Journal articles on the topic 'Eco-mechanical analysis'
To see the other types of publications on this topic, follow the link: Eco-mechanical analysis.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Eco-mechanical analysis.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Probst, Karin. "Eco-Efficiency Analysis of Environmental and Industrial Engineering." Pollution Engineering 49, no. 4 (October 26, 2020): 01–02. http://dx.doi.org/10.17762/pe.v49i4.33.
Full textAbstract:
With the expanding weighty weight from condition and nature asset, individuals has taken creative measures to liberate themselves from the current unreasonable financial improvement design, and unequivocally advanced the improvement of round sort and ecotype economy. The fundamental undertakings of eco-mechanical building are to bring the thoughts of ecotype into the plan of modern framework dependent on the speculations of roundabout economy, and accomplish the agreement of financial advantage and natural advantage. So as to acquire viable use proportion of asset and lower condition contamination, eco-effectiveness consolidates economy with condition. This paper dependent on exploring eco-proficiency markers framework, calls attention to eco-mechanical designing assessment strategies because of the eco-effectiveness.
2
Nor Hasnidawani, Johari, Noor Azlina Hassan, and Zahurin Halim. "Thermal Analysis of Kenaf Sandwich Panel." Advanced Materials Research 812 (September 2013): 271–74. http://dx.doi.org/10.4028/www.scientific.net/amr.812.271.
Full textAbstract:
The introduction of the eco-core sandwich panel composite is contributing a new approach to the designer to achieve high performance and light weight. In this research project, the new kenaf eco-core sandwich panel will be developed and then laminated with galvanized steel. The final goal is to find the optimum eco-core metal matrix composite sandwich structure with maximum mechanical properties such as stiffness and buckling. Kenaf eco-core sandwich will be fabricated and study on the interaction between eco-core sandwich panel and metal faces will be performed. The characterization of the eco-core sandwich panel will be done using different analytical tools. This study would provide a way to enhance the application of this new eco-core metal matrix composite sandwich structure.The amount of sample used was approximately 12 mg. The temperature profile was from 27°C to 1000°C at a heating rate of 10°C/min. In this study, result shows that degradation of composites starts to occur at about 180°C. Increasing the kenaf percent ratio will decrease the percent residue.
3
Liu, Xiao Ming, Yu Li, Ling Ling Zhang, and Da Qing Cang. "Utilization of CFB Fly Ash in Eco-Cement: Mechanical Properties and Microstructural Analysis." Advanced Materials Research 150-151 (October 2010): 885–89. http://dx.doi.org/10.4028/www.scientific.net/amr.150-151.885.
Full textAbstract:
The disposal of circulating fluidized bed (CFB) fly ash has been a serious environmental problem in the development of our society. In this work, the feasibility of recycling CFB fly ash as a blended material incorporating blast furnace slag (BFS), clinker and gypsum for the preparation of Eco-cement has been investigated. The mechanical properties of CFB fly ash based Eco-cements, including CFB fly ash–clinker system, CFB fly ash–ground BFS system, and CFB fly ash–ground BFS–clinker system, were evaluated in this paper. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques were used to analyze the microstructural changes and the hydration products of the CFB fly ash based Eco-cement pastes. The results indicated that it is feasible to use CFB fly ash along with BFS and clinker to produce Eco-cement. The hydration products of CFB fly ash based Eco-cement are mostly ettringite and amorphous C-S-H gel, which are principally responsible for the strength and structure development of CFB fly ash based Eco-cement in the hydration process.
4
Doddamani, Mrityunjay. "Dynamic mechanical analysis of 3D printed eco-friendly lightweight composite." Composites Communications 19 (June 2020): 177–81. http://dx.doi.org/10.1016/j.coco.2020.04.002.
Full text
5
Yao, Wu, Yu Kun Yang, and Meng Xue Wu. "Greenhouse Effect Reduction through Sustainable Magnesium Oxide Eco-Cement Products." Key Engineering Materials 680 (February 2016): 472–76. http://dx.doi.org/10.4028/www.scientific.net/kem.680.472.
Full textAbstract:
Portland cement production leads to significant carbon dioxide emission and greenhouse effect. Magnesium oxide eco-cement, which is a mixture of Portland cement, magnesium oxide and fly ash, may be an alternative production. In this paper, the issue is focused on the carbon dioxide absorption ability and mechanical performance of this eco-cement. Several mix proportions of eco-cement were designed to conduct forced carbonation, strength and expansion tests. Also, microstructure analysis after carbonation was conducted. The results indicate that magnesium oxide eco-cement can efficiently absorb carbon dioxide and carbonation can improve mechanical performance substantially, also expansion of the eco-cement is found to fall within the safe limits and possesses good stability and soundness.
6
Naumova, Yulia A., L. R. Lyusova, S. V. Kotova, and A. O. Volkov. "Influence of Phytonorman Eco-Oils Nature and Content on Processing of the Elastomeric Materials Based on Nitrile Butadiene Rubber Analysis." Key Engineering Materials 899 (September 8, 2021): 752–58. http://dx.doi.org/10.4028/www.scientific.net/kem.899.752.
Full textAbstract:
The work presents the results of testing new eco-oils in elastomeric materials based on nitrile butadiene rubber (NBR). The influence of eco-oils grade and content on the rubber mixes based on NBR 2665 processing was studied. It is established that Phytonorman 212 acts as a technologically active additive that improves the rheological and relaxation characteristics of rubber mixes. Phytonorman 213 acts as an activator of the vulcanization process when eco-oils content is 2 phr. To maintain the complex of physical, mechanical and working performances, so as to prevent the slowdown of the vulcanization process at 7 phr eco-oil content it is recommended to adjust vulcanizing group component content and filler grade.
7
Rabiman, Rabiman, and Nurcholish Arifin Handoyono. "KESADARAN BERLALU LINTAS MAHASISWA PENDIDIKAN TEKNIK MESIN UNIVERSITAS SARJANAWIYATA TAMANSISWA YOGYAKARTA." Jurnal Pendidikan Vokasi Otomotif 1, no. 2 (May 1, 2019): 27–44. http://dx.doi.org/10.21831/jpvo.v1i2.24029.
Full textAbstract:
This study aimed to determine: 1) The level of safety riding for students of Mechanical Engineering Education; and 2) The level of eco riding for students of Mechanical Engineering Education. The type of research used is descriptive. The research population was all students of Mechanical Engineering Education at The Faculty of Teacher Training and Education at Universitas Sarjanawiyata Tamansiswa. The sample was taken using the Stratified random sampling technique which found 199 students. The instrument used is a multiple choice test to measure the level of safety riding and the level of eco riding. The data analysis technique uses descriptive statistics. The result results showed that: 1) The level of safety riding for students of Mechanical Engineering Education was categorized very hight with an average value of 24,78; and 2) 1) The level of eco riding for students of Mechanical Engineering Education was categorized very hight with an average value of 6,85.
8
Derewonko, Agnieszka, Wojciech Fabianowski, and Jerzy Siczek. "Mechanical Testing of Epoxy Resin Modified with Eco-Additives." Materials 16, no. 5 (February 24, 2023): 1854. http://dx.doi.org/10.3390/ma16051854.
Full textAbstract:
The future belongs to biodegradable epoxies. In order to improve epoxy biodegradability, it is crucial to select suitable organic additives. The additives should be selected so as to (maximally) accelerate the decomposition of crosslinked epoxies under normal environmental conditions. However, naturally, such rapid decomposition should not occur within the normal (expected) service life of a product. Consequently, it is desirable that the newly modified epoxy should exhibit at least some of the mechanical properties of the original material. Epoxies can be modified with different additives (such as inorganics with different water uptake, multiwalled carbon nanotubes, and thermoplastics) that can increase their mechanical strength but does not lead to their biodegradability. In this work, we present several mixtures of epoxy resins together with organic additives based on cellulose derivatives and modified soya oil. These additives are environmentally friendly and should increase the epoxy’s biodegradability on the one hand without deteriorating its mechanical properties on the other. This paper concentrates mainly on the question of the tensile strength of various mixtures. Herein, we present the results of uniaxial stretching tests for both modified and unmodified resin. Based on statistical analysis, two mixtures were selected for further studies, namely the investigation of durability properties.
9
Shi, Dongmei, Lili Ren, Hongyu Li, Haizhen Zhang, and Rufei Zhang. "Analysis of the Spatial Differentiation and Promotion Potential for Agricultural Eco-Efficiency—Evidence of Pollution’s Strong Disposability." International Journal of Environmental Research and Public Health 20, no. 3 (January 29, 2023): 2397. http://dx.doi.org/10.3390/ijerph20032397.
Full textAbstract:
Agricultural eco-efficiency is an important indicator used to measure agriculture’s high-quality and sustainable development. Therefore, this paper uses the EBM-Super-ML method with strong disposability of undesired output to calculate Chinese agricultural eco-efficiency and uses a geographical detector to measure the driving force of the factor. The research conclusions are mainly reflected in three aspects. Firstly, from the perspective of eco-efficiency changes, the overall mean value of agricultural eco-efficiency increased by 3.5%, and the regional heterogeneity is significant, with the fastest growth in the eastern region. Secondly, the results of driving force analysis show that the main driving factors of agricultural eco-efficiency divergence are capital inputs, total carbon emissions, labor inputs, agricultural film residues, fertilizer use, and pesticide residues, with driving forces of 0.43, 0.37, 0.34, 0.31, 0.28, and 0.20, respectively. Finally, from the perspective of eco-efficiency improvement potential, the mean value of output improvement potential is 5%, and the input factor is 7%. Among the non-desired outputs, the reduction rate of agricultural films can reach 40%. Among the input factors, labor input has the highest potential for intensive use, while agricultural machinery has a negative effect. Therefore, strengthening the development of the agricultural service industry is of great significance to improve the utilization rate of mechanical equipment and reduce the undesired output of agriculture.
10
Gargol, Mateusz, Tomasz Klepka, Łukasz Klapiszewski, and Beata Podkościelna. "Synthesis and Thermo-Mechanical Study of Epoxy Resin-Based Composites with Waste Fibers of Hemp as an Eco-Friendly Filler." Polymers 13, no. 4 (February 7, 2021): 503. http://dx.doi.org/10.3390/polym13040503.
Full textAbstract:
The synthesis, thermal, and mechanical properties of epoxy resin composites incorporating waste fibers of hemp were studied. Five different systems with increasing quantity of the eco-filler were obtained. For the synthesis of polymeric materials, the commercial epoxy resins Epidian® 5 and triethylenetetramine (TETA) were applied as crosslinking agents. The composites were obtained based on the polyaddition reaction of an amine group with an epoxide ring. ATR/FT-IR (Attenuated Total Reflection-Fourier Transform Infrared) analysis was used to confirm the chemical structure of the composites and the course of curing processes. Moreover, the influence of the eco-friendly components on the mechanical properties was determined, while thermal properties of the materials were investigated by thermogravimetry analysis (TGA) and differential scanning calorimetry (DSC). Dynamic mechanical studies (DMA) and Shore hardness tests of the obtained polymers were also carried out. The DSC curves and DMA analysis revealed that all materials were characterized by a similar glass transition range. Furthermore, the DMA and hardness measurements of the composites demonstrated an increasing elasticity with the increase in the amount of eco-filler present in the compositions.
11
Salem, Tuffaha Fathe, Seha Tirkes, Alinda Oyku Akar, and Umit Tayfun. "Enhancement of mechanical, thermal and water uptake performance of TPU/jute fiber green composites via chemical treatments on fiber surface." e-Polymers 20, no. 1 (March 21, 2020): 133–43. http://dx.doi.org/10.1515/epoly-2020-0015.
Full textAbstract:
AbstractChopped jute fiber (JF) surfaces were modified using alkaline, silane and eco-grade epoxy resin. Surface characteristics of jute fibers were confirmed by FTIR and EDX analyses. JF filled polyurethane elastomer (TPU) composites were prepared via extrusion process. The effect of surface modifications of JF on mechanical, thermo-mechanical, melt-flow, water uptake and morphological properties of TPU-based eco-composites were investigated by tensile and hardness tests, dynamic mechanical analysis (DMA), melt flow index (MFI) test, water absorption measurements and scanning electron microscopy (SEM) techniques, respectively. Mechanical test results showed that silane and epoxy treated JF additions led to increase in tensile strength, modulus and hardness of TPU. Glass transition temperature (Tg) of TPU rose up to higher values after JF inclusions regardless of treatment type. Si-JF filled TPU exhibited the lowest water absorption among composites. Surface treated JFs displayed homogeneous dispersion into TPU and their surface were covered by TPU according to SEM micro-photographs.
12
Ali, Farhan Afif, Khairum Hamzah, Najiyah Safwa Khashi’ie, Iskandar Waini, Nuzaimah Mustafa, and Nik Mohd Asri Nik Long. "MECHANICAL AND PHYSICAL PROPERTIES OF SAWDUST-REINFORCED EPOXY RESIN COMPOSITES." Journal of Southwest Jiaotong University 57, no. 3 (June 30, 2022): 292–99. http://dx.doi.org/10.35741/issn.0258-2724.57.3.23.
Full textAbstract:
Sawdust is one of the beneficial by-products of wood production, along with a number of others. In the construction of structures, sawdust, considered a waste material, is successfully used to create sawdust concrete. In the present study, a new analysis of the mechanical and physical properties of sawdust-reinforced epoxy resin composites (SRER) was presented. This mixing composite was fabricated using the compression molding techniques to produce three eco-friendly ratios between natural and synthetic materials: 75% of sawdust and 25% of epoxy (75S25E), 80% of sawdust and 20% of epoxy (80S20E), and 85% of sawdust and 15% of epoxy (85S15E). The images of the sawdust material were captured using Nikon SMZ 745T microscope, and their mechanical properties were analyzed using tensile, impact, and surface roughness tests. The collected data were analyzed using statistical analysis. Numerical computations and graphical demonstrations were carried out to observe the mechanical and physical properties of the SRER composite according to the three ratios. Their mechanical and physical properties will affect the different ratios of SRER composite. The outcomes demonstrated that due to the synergistic effect of reinforcements, the composite with 80% of sawdust had better mechanical properties than the other eco-friendly ratios composites. Furthermore, the mechanically tested samples were subjected to a surface roughness test to investigate the impact of the speed parameters of the CNC router machine spindle. The results show the significance of the CNC router machine spindle speed parameters for the eco-friendly ratios of SRER composite.
13
Oliaei, Erfan, Tom Lindström, and Lars A. Berglund. "Sustainable Development of Hot-Pressed All-Lignocellulose Composites—Comparing Wood Fibers and Nanofibers." Polymers 13, no. 16 (August 16, 2021): 2747. http://dx.doi.org/10.3390/polym13162747.
Full textAbstract:
Low-porosity materials based on hot-pressed wood fibers or nanocellulose fibrils (no polymer matrix) represent a new concept for eco-friendly materials with interesting mechanical properties. For the replacement of fossil-based materials, physical properties of wood fiber materials need to be improved. In addition, the carbon footprint and cumulative energy required to produce the material also needs to be reduced compared with fossil-based composites, e.g., glass fiber composites. Lignin-containing fibers and nanofibers are of high yield and special interest for development of more sustainable materials technologies. The present mini-review provides a short analysis of the potential. Different extraction routes of lignin-containing wood fibers are discussed, different processing methods, and the properties of resulting fiber materials. Comparisons are made with analogous lignin-containing nanofiber materials, where mechanical properties and eco-indicators are emphasized. Higher lignin content may promote eco-friendly attributes and improve interfiber or interfibril bonding in fiber materials, for improved mechanical performance.
14
Luan, Kun, Bao Zhong Sun, Bo Hong Gu, and Jia Jin Zhang. "Design of an Eco-Power Automobile Body Made from Green Composite and its Structural Optimization in FEA." Advanced Materials Research 287-290 (July 2011): 405–9. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.405.
Full textAbstract:
Ramie (Boehmeria nivea) is a kind of natural fiber that has good mechanical and environmental friendly properties. The fabric woven by ramie yarns shows excellent dimensional stability. Polypropylene (PP) was used as matrix for its recyclable and thermoplastic properties. PP is the widely used thermoplastics for composite and currently it is very common in building, construction, furniture and automotive products. Since the eco-power automobile body was designed for light-weight and low fuel consumption, there seems to be high potential application to automobile industry for ramie-PP composite. Therefore, in this paper, we developed a constitution of fabric to form stable structure reinforcement. The reinforcement and PP particles were treated in vulcanizer by thermo-compression technology. The fundamental mechanical properties of the composite were tested for finite element analysis (FEA). An eco-power automobile body was designed in Pro/E® Wildfire 5.0 and transferred to Finite Element Analysis Software for material and structural simulation analysis. Structural improvement and sizing optimization of the eco-power automobile body model were simulated to judge the material application and its structure effectiveness.
15
Prasomsin, Wassika, Tewarak Parnklang, Chaweewan Sapcharoenkun, Sunan Tiptipakorn, and Sarawut Rimdusit. "Multiwalled Carbon Nanotube Reinforced Bio-Based Benzoxazine/Epoxy Composites with NIR-Laser Stimulated Shape Memory Effects." Nanomaterials 9, no. 6 (June 14, 2019): 881. http://dx.doi.org/10.3390/nano9060881.
Full textAbstract:
Smart materials with light-actuated shape memory effects are developed from renewable resources in this work. Bio-based benzoxazine resin is prepared from vanillin, furfurylamine, and paraformaldehyde by utilizing the Mannich-like condensation. Vanillin-furfurylamine-containing benzoxazine resin (V-fa) is subsequently copolymerized with epoxidized castor oil (ECO). When the copolymer is reinforced with multiwalled carbon nanotubes (MWCNTs), the resulting composite exhibits shape memory effects. Molecular characteristics of V-fa resin, ECO, and V-fa/ECO copolymers are obtained from Fourier transform infrared (FT-IR) spectroscopy. Curing behavior of V-fa/ECO copolymers is investigated by differential scanning calorimetry. Dynamic mechanical properties of MWCNT reinforced V-fa/ECO composites are determined by dynamic mechanical analysis. Morphological details and distribution of MWCNTs within the copolymer matrix are characterized by transmission electron microscopy. Shape memory performances of MWCNT reinforced V-fa/ECO composites are studied by shape memory tests performed with a universal testing machine. After a significant deformation to a temporary shape, the composites can be recovered to the original shape by near-infrared (NIR) laser actuation. The shape recovery process can be stimulated at a specific site of the composite simply by focusing NIR laser to that site. The shape recovery time of the composites under NIR actuation is four times faster than the shape recovery process under conventional thermal activation. Furthermore, the composites possess good shape fixity and good shape recovery under NIR actuation.
16
Ashraful Alam, Zakaria Ahmed, Neaz Morshed, Pulak Talukder, and Taslima Rahman. "Analysis of physio-mechanical properties of pineapple leaf fiber." International Journal of Life Science Research Archive 3, no. 2 (November 30, 2022): 113–16. http://dx.doi.org/10.53771/ijlsra.2022.3.2.0127.
Full textAbstract:
The present research demonstrated that different fiber intimate blends allow the broader use of pineapple leaf fiber for the textile and clothing industries. This fiber is obtained from the leaves of pineapple plants by extraction, carried out to separate the cambium and fiber using a decorticator Machine. The physic-mechanical properties such as bundle strength, whiteness, lustre, linear density, breaking load, breaking extension tenacity, textile modulus were determined as per standard method using different testing machine. There is correlation between length, width and thickness where, if the length is higher than width and thickness also higher. Pineapple (PALF) has tremendous mechanical properties and can be applied in making eco-friendly textile goods. Density of PALF is similar to other natural fibers while Textile modulus is very high, and tensile strength is highest among the related natural fibers. These properties are suitable for its application so this pineapple fibers by blending and mixing with other natural fibers and can be produce various types of cloths.
17
Abdeljaber, Abdulrahman, Rawan Zannerni, Wedad Masoud, Mohamed Abdallah, and Lisandra Rocha-Meneses. "Eco-Efficiency Analysis of Integrated Waste Management Strategies Based on Gasification and Mechanical Biological Treatment." Sustainability 14, no. 7 (March 25, 2022): 3899. http://dx.doi.org/10.3390/su14073899.
Full textAbstract:
Integrated solid waste management (ISWM) strategies are developed towards promoting sustainable approaches for handling waste. Recently, gasification and mechanical biological treatment (MBT) technologies were recognized as effective processes for treating municipal solid waste. This study investigates the feasibility of integrating gasification and MBT technologies in multiple ISWM strategies, compared to incineration- and anaerobic digestion (AD)-based strategies. A comprehensive techno-economic and environmental assessment was carried out to evaluate the performance of the examined ISWM strategies. The evaluation was based on the energy generation potential, carbon footprint, and life cycle costing (LCC). An eco-efficiency analysis was conducted to quantify the environmental costs by incorporating the carbon footprint and LCC results. The proposed strategies were applied for the city of Abu Dhabi, United Arab Emirates, based on local bylaws and guidelines. The analysis revealed that the gasification-based strategy had the highest energy production of 47.0 million MWh, followed by the incineration- (34.2 million MWh), AD- (17.2 million MWh), and MBT-based (14.9 million MWh) strategies. Results of the environmental analysis indicated that the MBT- and AD-based strategies contributed the least to global warming with greenhouse gas emissions of 4442 and 4539 GgCO2-eq, respectively, compared to the gasification- (9922 GgCO2-eq) and incineration-based (15,700 GgCO2-eq) strategies. Furthermore, over a 25-year assessment period, the LCC findings demonstrated that the gasification- and MBT-based strategies were the most financially feasible with a positive net present value (NPV) of USD 364 and USD 284 million, respectively. The eco-efficiency analysis indicated that the MBT and gasification strategies are the most sustainable among the examined strategies. The sustainability of the assessed systems was improved by implementing policy and legal reforms, including incentive programs, less stringent bylaws on digestate, and encouraging source separation of wastes. Overall, this research emphasized the potential environmental and financial benefits of incorporating MBT and gasification technologies into ISWM strategies.
18
Yasin, I., and A. Priyanto. "Analysis of bamboo mechanical properties as construction eco-friendly materials to minimizing global warming effect." IOP Conference Series: Materials Science and Engineering 535 (June 17, 2019): 012001. http://dx.doi.org/10.1088/1757-899x/535/1/012001.
Full text
19
Wan, Ai Lan, and Wei Dong Yu. "Surface Modification of Wool Fibers by Ecologically Ozone-Assisted Treatment." Advanced Materials Research 181-182 (January 2011): 383–88. http://dx.doi.org/10.4028/www.scientific.net/amr.181-182.383.
Full textAbstract:
Wool fiber was modified using ecologically acceptable ozone-assisted treatment (ECO) in this study. Chemical and mechanical analysis of the treated samples compared with the untreated and Basolan○,R88 treated ones are reported. An atom force microscope (AFM) results show that the crimple was generated on the surface of ECO treated wool fiber and the peak-to-valley decreased slightly. However, Fourier transforms infrared spectra (FTIR) results suggest the absorbency and the oxidation of disulfide bonds increased after the ECO treatment, especially at 1024cm-1. The crystallinity of the treated wool fiber slightly increased based on the X-ray results. The treatment also led to reduction in strength of the wool fiber.
20
A, Sudalai Raja, and Jebakani D. "Experimental Analysis on Mechanical Properties of Natural Bio-Polymer Composite." Journal of Manufacturing Engineering 16, no. 1 (March 1, 2021): 012–17. http://dx.doi.org/10.37255/jme.v16i1pp012-017.
Full textAbstract:
Bio-composites are used in many engineering applications due to various desirable properties that they offer such as light weight, low cost, bio-degradable and bio-compatible. Bio-composites are used in many industries such as automotive, sporting goods, marine, electrical and household appliances. Kenaf, jute, banana, flux is used as fibers. The mechanical properties are evaluated by appropriate testing methods. The strength of material is important to each material so that bio-material to be evaluated by mechanical testing methods. In this study an attempt is made to prepare natural resin with neem oil and Thennamarakudi oil and to fabricate Bio-composite with fish shell and screw pine fiber as reinforcement and test for its mechanical properties such as tensile, Impact and Flexural. The pure resin samples have tensile and flexible properties. After taken testing. the neem oil-based biomaterial flexibility is higher than the oil-based biomaterial. The stiffness is higher in Tk oil-based biomaterial. The result is expected from the biomaterial as eco-friendly material and applicable for medical field as biocompatible
21
Sergi, Claudia, Jacopo Tirillò, Fabrizio Sarasini, Enrique Barbero Pozuelo, Sonia Sanchez Saez, and Christoph Burgstaller. "The Potential of Agglomerated Cork for Sandwich Structures: A Systematic Investigation of Physical, Thermal, and Mechanical Properties." Polymers 11, no. 12 (December 17, 2019): 2118. http://dx.doi.org/10.3390/polym11122118.
Full textAbstract:
Considering the major role played by sandwich structures in many fields where high stiffness-to-weight ratio is required, the selection of a suitable core material is of paramount importance. In order to face the environmental problems related to waste disposal, the selection of an eco-friendly core material is now included in the design criteria of sandwich structures. Agglomerated cork is recognized as a good solution that combines satisfactory mechanical performances and eco-sustainability. Many research studies individually addressed cork’s morphological, thermal, and mechanical features without providing a comprehensive overview of the relationships that exist between them. In this work, the investigation of the peculiar cork morphology allowed learning more about its good insulation capacity and its impressive recovery capability. The use of dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA) clarified the influence of temperature on both flexural and compressive performances. The effect of testing parameters such as temperature and speed on agglomerated cork properties was validated through statistical analysis. Moreover, to highlight agglomerated cork advantages and drawbacks, the work provides also a comparison with more traditional polyvinylchloride (PVC) foams commonly used in industrial applications.
22
Chang, Tao. "Analysis on PLA Textile Fiber Production Technology and Properties." Applied Mechanics and Materials 52-54 (March 2011): 2145–50. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.2145.
Full textAbstract:
PLA fiber is a green eco-fiber of excellent properties and sustainable development, with adequate sources of raw materials, low energy consumption, good biodegradability, and excellent physical and mechanical properties, thus the development of this product not only has considerable economic benefits, and also has excellent social benefits. In this paper, through comprehensively testing the properties of PLA fiber, it carries out the systematical analysis and research on the Tests of PLA fiber length, fineness, over length, double length, and defects, combustion property, heat resistance, and hydrolysis property, etc. several aspects.
23
Li, Feng, and Ying Cheng Hu. "The Dominant Factor Analysis of Production Technology of Poplar LVL Based on Grey Theory." Materials Science Forum 658 (July 2010): 284–87. http://dx.doi.org/10.4028/www.scientific.net/msf.658.284.
Full textAbstract:
Wood is one kind of natural renewable eco-material. Laminated veneer lumber (LVL) is an engineered wood product made from veneers glued together with parallelly oriented grains under heat and pressure. This paper designed Poplar LVL production experiments under different process conditions, and measured the mechanical properties of poplar LVL specimens under different experimental conditions. In this study, grey theory was used to analyze the influences of different production processes on the mechanical properties, such as press duration, press temperature, pressure and adhesive spread. The result showed that, it is feasible that grey theory is used to analyze the influence level of production technology of poplar LVL on the mechanical properties. So this paper offered a new method to analyze and design the production technology of LVL.
24
Li, Feng, and Ying Cheng Hu. "The Dominant Factor Analysis of Dynamic Shear Modulus of Poplar LVL Based on Grey Theory." Advanced Materials Research 113-116 (June 2010): 811–14. http://dx.doi.org/10.4028/www.scientific.net/amr.113-116.811.
Full textAbstract:
Wood is one kind of natural renewable eco-material. Laminated veneer lumber (LVL) is an engineered wood product made from veneers glued together with parallelly oriented grains under heat and pressure. This paper designed Poplar LVL production experiments under different process conditions, and measured the mechanical properties of poplar LVL specimens under different experimental conditions. In this study, grey theory was used to analyze the influences of different production processes on the mechanical properties, such as press duration, press temperature, pressure and adhesive spread. The results showed that, it is feasible that grey theory is used to analyze the influence level of production technology of poplar LVL on the mechanical properties. So this paper offered a new method to analyze and design the production technology of LVL.
25
Lanante, Francis Denrick, Christian Lloyd E. Tambis, Geselle C. Bacunawa, Marianne Agnes T. Mendoza, Jeruel A. Espinazo, and Loudie B. Suliva. "PERFORMANCE AND PROPERTIES OF ECO-FRIENDLY CEMENT BRICKS ADDED WITH POLYESTER FABRIC WASTES." Journal of BIMP-EAGA Regional Development 7, no. 1 (January 24, 2022): 1–9. http://dx.doi.org/10.51200/jbimpeagard.v7i1.3690.
Full textAbstract:
With brick a common construction material, there is a shortage of sources for making bricks. Fabric wastes can serve as replacement for a portion of brick aggregates both for practicality and sustainability. This is especially since the fashion industry has been known to contribute to negative environmental impacts. This paper describes the materials and methods as well as properties of eco-friendly cement bricks added with polyester fabric wastes. The eco-friendly bricks were compared to traditional cement bricks in terms of physical and mechanical properties. Traditional bricks were prepared at a ratio of 1:5 of cement to sand while eco-friendly bricks were prepared at a ratio of 1:5:1 of cement to sand to fabric wastes. All the methods used in this study were based on the standards set by the American Society for Testing and Materials (ASTM, 2006). Statistical analysis using t-test revealed that both bricks were comparable in terms of physical properties of mass (kg) (t=1.780, p=0.086), bulk density (kg/m3) (t=1.780, p=0.086), and water absorption percentage (%) (t=–0.336, p=0.740) as well as mechanical properties of maximum load (kN) (t=1.000, p=0.326) and compressive strength (Mpa) (t=1.000, p=0.326) with results having no significant differences in their means. In terms of cost, eco-friendly bricks are cheaper by Php 3.00 than traditional bricks. Eco-friendly cement bricks added with polyester fabric wastes can therefore serve as a viable alternative for traditional bricks. Additional testing such as in situ testing can be conducted to determine practical applications of the eco-friendly bricks added with fabric wastes in non-load bearing walls for instance.
26
Lanante, Francis Denrick, Christian Lloyd E. Tambis, Geselle, C. Bacunawa, Marianne Agnes T. Mendoza, Jeruel A. Espinazo, and Loudie B. Suliva. "PERFORMANCE AND PROPERTIES OF ECO-FRIENDLY CEMENT BRICKS ADDED WITH POLYESTER FABRIC WASTES." Journal of BIMP-EAGA Regional Development 6, no. 1 (December 30, 2020): 71–80. http://dx.doi.org/10.51200/jbimpeagard.v6i1.3278.
Full textAbstract:
With brick a common construction material, there is a shortage of sources for making bricks. Fabric wastes can serve as replacement for a portion of brick aggregates both for practicality and sustainability. This is especially since the fashion industry has been known to contribute to negative environmental impacts. This paper describes the materials and methods as well as properties of eco-friendly cement bricks added with polyester fabric wastes. The eco-friendly bricks were compared to traditional cement bricks in terms of physical and mechanical properties. Traditional bricks were prepared at a ratio of 1:5 of cement to sand while eco-friendly bricks were prepared at a ratio of 1:5:1 of cement to sand to fabric wastes. All the methods used in this study were based on the standards set by the American Society for Testing and Materials (ASTM, 2006). Statistical analysis using t-test revealed that both bricks were comparable in terms of physical properties of mass (kg) (t=1.780, p=0.086), bulk density (kg/m3 ) (t=1.780, p=0.086), and water absorption percentage (%) (t=–0.336, p=0.740) as well as mechanical properties of maximum load (kN) (t=1.000, p=0.326) and compressive strength (Mpa) (t=1.000, p=0.326) with results having no significant differences in their means. In terms of cost, eco-friendly bricks are cheaper by Php 3.00 than traditional bricks. Eco-friendly cement bricks added with polyester fabric wastes can therefore serve as viable alternative for traditional bricks. Additional testing such as in situ testing can be conducted to determine practical applications of the eco-friendly bricks added with fabric wastes in non-load bearing walls for instance.
27
Çakıroğlu, Celal, and Gebrail Bekdaş. "Buckling analysis of natural fiber reinforced composites." Challenge Journal of Structural Mechanics 7, no. 2 (June 23, 2021): 58. http://dx.doi.org/10.20528/cjsmec.2021.02.001.
Full textAbstract:
In the recent years natural fiber reinforced composites are increasingly receiving attention from the researchers and engineers due to their mechanical properties comparable to the conventional synthetic fibers and due to their ease of preparation, low cost and density, eco-friendliness and bio-degradability. Natural fibers such as kenaf or flux are being considered as a viable replacement for glass, aramid or carbon. Extensive experimental studies have been carried out to determine the mechanical behavior of different natural fiber types such as the elastic modulus, tensile strength, flexural strength and the Poisson’s ratio. This paper presents a review of the various experimental studies in the field of fiber reinforced composites while summarizing the research outcome about the elastic properties of the major types of natural fiber reinforced composites. Furthermore, the performance of a kenaf reinforced composite plate is demonstrated using finite element analysis and results are compared to a glass fiber reinforced laminated composite plate.
28
Sambucci, Matteo, Abbas Sibai, Luciano Fattore, Riccardo Martufi, Sabrina Lucibello, and Marco Valente. "Finite Element Multi-Physics Analysis and Experimental Testing for Hollow Brick Solutions with Lightweight and Eco-Sustainable Cement Mix." Journal of Composites Science 6, no. 4 (April 5, 2022): 107. http://dx.doi.org/10.3390/jcs6040107.
Full textAbstract:
Combining eco-sustainability and technological efficiency is one of the “hot” topics in the current construction and architectural sectors. In this work, recycled tire rubber aggregates and acoustically effective fractal cavities were combined in the design, modeling, and experimental characterization of lightweight concrete hollow bricks. After analyzing the structural and acoustic behavior of the brick models by finite element analysis as a function of the type of constituent concrete material (reference and rubberized cement mixes) and hollow inner geometry (circular- and fractal-shaped hollow designs), compressive tests and sound-absorption measurements were experimentally performed to evaluate the real performance of the developed prototypes. Compared to the traditional circular hollow pattern, fractal cavities improve the mechanical strength of the brick, its structural efficiency (strength-to-weight ratio), and the medium–high frequency noise damping. The use of ground waste tire rubber as a total concrete aggregate represents an eco-friendlier solution than the ordinary cementitious mix design, providing, at the same time, enhanced lightweight properties, mechanical ductility, and better sound attenuation. The near-compliance of rubber-concrete blocks with standard requirements and the value-added properties have demonstrated a good potential for incorporating waste rubber as aggregate for non-structural applications.
29
Dieterle, Michael, Elisa Seiler, and Tobias Viere. "Application of Eco-Efficiency Analysis to Assess Three Different Recycling Technologies for Carbon Fiber Reinforced Plastics (CFRPs)." Key Engineering Materials 742 (July 2017): 593–601. http://dx.doi.org/10.4028/www.scientific.net/kem.742.593.
Full textAbstract:
The purpose of this paper is to evaluate the eco-efficiency of three different recycling technologies for carbon fiber reinforced plastic (CFRP) waste, and to identify the preferable and most efficient solution. Recycling via mechanical shredding, microwave pyrolysis and subcritical solvolysis is compared and comprehensive primary data on energy demand and process throughput are examined. Following an ecological and economic assessment, the results are normalized and summarized into three single-score indicators. To decide which solution is most efficient, economic and ecological data are plotted on an eco-efficiency portfolio. The achieved results demonstrate that the eco-efficiency of the recycling technologies investigated is entirely positive on an industrial scale, and that the efficient use of CFRPs across the entire life cycle is possible. The material recycling of CFRP waste is consequently a promising topic for future development. The use of recycled material as conductivity additives in secondary applications can be considered as a valuable option for all three technologies, although the benefits of recycling are strongly dependent on the quality and quantity of the recycled material. Depending on the resources substituted in a secondary application, different recycling technologies offer considerable advantages. To ensure a consistently high quality of output materials on an industrial scale, specific process parameters have to be identified, for which, further research is necessary.
30
Mao, Haiquan, Chun Wei, Yongyang Gong, Shiqi Wang, and Wenwen Ding. "Mechanical and Water-Resistant Properties of Eco-Friendly Chitosan Membrane Reinforced with Cellulose Nanocrystals." Polymers 11, no. 1 (January 18, 2019): 166. http://dx.doi.org/10.3390/polym11010166.
Full textAbstract:
Environmentally benign and biodegradable chitosan (CS) membranes have disadvantages such as low mechanical strength, high brittleness, poor heat resistance and poor water resistance, which limit their applications. In this paper, home-made cellulose nanocrystals (CNC) were added to CS to prepare CNC/CS composite membranes through mechanical mixing and solution casting approaches. The effects of CNC dispersion patterns and CNC contents on the properties of composite membranes were studied. The analysis of the surface and cross-section morphology of the membranes showed that the dispersion performance of the composite membrane was better in the case that CNC was dissolved in an acetic acid solution and then mixed with chitosan by a homogenizer (Method 2). CNC had a great length-diameter ratio and CNC intensely interacted with CS. The mechanical properties of the composite membrane prepared with Method 2 were better. With a CNC content of 3%, the tensile strength of the composite membrane reached 43.0 MPa, 13.2% higher than that of the CNC-free membrane. The elongation at break was 41.6%, 56.4% higher than that of the CNC-free membrane. Thermogravimetric, contact angle and swelling analysis results showed that the addition of CNC could improve the heat and water resistance of the chitosan membrane.
31
Namboonruang, Weerapol. "An Effect on Properties of Hybrid Fibres Bio-Composite: Sustainable on Rural Building Materials." Key Engineering Materials 777 (August 2018): 491–98. http://dx.doi.org/10.4028/www.scientific.net/kem.777.491.
Full textAbstract:
These are developed to the Eco-composite structure for using of the rural building materials. The chemical and physical properties were carried associated with Ratchaburi lateritic red soil and cellulose fibers for product development. Also mechanical testing, thermal conductivity, leachability, environmental toxic and Finite element analysis (FEA) were conducted for product evaluation.
32
KHUMALO, NDUDUZO L., SAMSON M. MOHOMANE, SETUMO V. MOTLOUNG, LEHLOHONOLO F. KOAO, THEMBINKOSI D. MALEVU, and TSHWAFO E. MOTAUNG. "PREPARATION AND ANALYSIS OF CELLULOSE PFA COMPOSITES: A CRITICAL REVIEW." Cellulose Chemistry and Technology 55, no. 3-4 (April 20, 2021): 299–309. http://dx.doi.org/10.35812/cellulosechemtechnol.2021.55.30.
Full textAbstract:
"Many researchers have studied ways to convert various agricultural by-products into useful eco-friendly polymer composites due to the demand for sustainable production. Poly(furfuryl) alcohol (PFA) seems to be one of the emerging eco-friendly polymers, particularly when impregnated with cellulose. Cellulose is the most abundant biopolymer and organic compound on earth, extracted from a variety of materials, such as plants, animals (tunicates), algae and bacteria. Nanocrystalline cellulose serves as elementary “building blocks”, with properties such as uniformity and durability, which are critical for second-generation cellulose-based products and their engineering applications. This review focuses on the latest research on PFA reinforced with cellulose nanowhiskers. The most commonly used method to prepare composites is in-situ polymerization, which yields cellulose PFA composites with a significant increase in thermal stability and mechanical properties. The viscoelastic properties of cellulose PFA nanocomposites were also proven to enhance, in terms of storage modulus and flexural strength, with a reduction in the energy loss, evident by the intensity of the tan peaks. Critical milestones that still need to be achieved by researchers are clearly outlined in the review. Also, solid recommendations in terms of interrupting polymer composites markets using PFA composites are made."
33
Elbehiry, Amgad, and Marwan Mostafa. "Finite Element Analysis of Beams Reinforced with Banana Fiber Bars (BFB)." Fibers 8, no. 8 (August 14, 2020): 52. http://dx.doi.org/10.3390/fib8080052.
Full textAbstract:
One of the challenges of the century is to reach compatibility between the required resistance and the usage of lightweight building materials that may negatively affect the mechanical properties. Natural fibers nowadays are used as enhancers in the industrial field. Hence, the fibers contribute by giving an ideal solution to improve mechanical proprieties of the structural elements such as tensile and impact strength. In previous studies, the use of natural fibers as reinforcement in construction materials has increased. Natural fibers have a lot of characteristics such as being strong, lightweight, inexpensive, and eco-friendly. This paper aims to investigate the performance of banana fiber bars (BFB) as reinforced material. Through this study, the development and characterization of natural fibers-based composite beams were observed. After the beams were designed, several types of finite element analysis were conducted using ‘ANSYS’ nonlinear finite element program under one-point loading. Results show good correlations between experimental and predicted results.
34
Tian, Ying Xia, Wei Huang, Dong Zhao, and Cheng Hua Zhang. "Simplified Calculation Model of Eco-Composite Wall Structure Based on Composite." Advanced Materials Research 250-253 (May 2011): 2098–101. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.2098.
Full textAbstract:
The eco-composite wall structure is a new structural system, characterized by ecology, low weight, high strength, saving energy and good aseismic performance. As the main load-bearing member of the structure, Multi-ribbed composite wall consists of concealed frame, concrete frame grids, ecological filling blocks and so on, which makes the entities calculation model extremely complicated. Therefore, it is necessary to present the simplified calculation model of the structure. Based on constitution and mechanical analysis of the multi-ribbed composite wall, the wall is equaled to an elastic plate with the filling blocks as matrix and concrete grids as reinforced fibers in elastic stage, consequentially rigid frame-composite elastic plate of eco-composite wall structure is proposed, and the model is employed to perform the time-history analysis. Experimental analysis shows that rigid frame-composite elastic plate model can meet the usage of engineering in elastic stage, and it provides a more simplified calculation method.
35
Sun, Bao Zhong, Kun Luan, Bo Hong Gu, Xiao Meng Fang, and Jia Jin Zhang. "Light-Weighting Design of Eco-Power Automobile Chassis Made from Green Composite and its Topology Optimization in FEA." Advanced Materials Research 341-342 (September 2011): 183–88. http://dx.doi.org/10.4028/www.scientific.net/amr.341-342.183.
Full textAbstract:
Green composite made from ramie fabric and polypropylene (PP) is a kind of recyclable and environmental friendly material. Ramie fiber tows have relatively good mechanical properties comparing with other bast fibers, and hence the fabric woven by ramie yarn shows excellent in-plane mechanical behaviors. PP can be fully recovered and recycling used for its thermoplastic character. Ramie fabrics reinforced by PP have better shape formability and maintenance. In this paper, we proposed a plain weave in sample dobby loom, and reinforced four laid-layers together by PP particle through hot pressing. The mechanical behaviors of the ramie-PP composite were tested by MTS-810 Material Testing System in weft and warp directions separately which were essential parameters to the following topology optimization in finite element analysis (FEA) software. A body of eco-power automobile consisting of shell and chassis was original designed in Pro/E® Wildfire 5.0. For the chassis is the main bearing structure, it is an important part in the eco-power automobile body and was chosen to be topology optimized. Fiber volume fraction and structure optimization of the chassis model are evaluated and simulated to guide the material formation of manufacture progress.
36
Sadaf, Shama, Muhammad Saeed, and Samia Kalsoom. "Application of Eco-friendly Antimicrobial Finish Butea monosperma Leaves on Fabric Properties of Polyester and Cotton/Polyester." Pakistan Journal of Scientific & Industrial Research Series A: Physical Sciences 60, no. 3 (October 30, 2017): 154–61. http://dx.doi.org/10.52763/pjsir.phys.sci.60.3.2017.154.161.
Full textAbstract:
The study was aimed to check the effect of eco-friendly antimicrobial finish on 100% polyesterand 50/50 cotton/polyester woven fabrics. The leaves extract of Butea monosperma was used as an eco-friendly antimicrobial finish. The fabric was first desized, scoured, bleached and washed then antimicrobialfinish was applied by using pad dry cure method. The aesthetic, comfort and mechanical fabrics propertieswere checked before and after applying antimicrobial finish. Under aesthetic property stiffness andsmoothness appearance was checked, under comfort related property absorbency and air permeability waschecked and under mechanical property tear and tensile strength was checked. The antimicrobial finishwas checked by using ASTEM E2149 Shake Flask method. The AATCC and ISO standard testing methodswere used for checking fabric properties. One way ANOVA statistical test was applied for analysis ofresults. Antimicrobial finish has increased aesthetic (stiffness, smoothness appearance), comfort (absorbency,air permeability) and mechanical (tensile and tear strengths) properties of polyester and cotton/polyesterfabrics. The antimicrobial finish was effective on both 100% polyester and 50/50 cotton/polyester fabricsup to 25 washes. This study is beneficial to medical industry, paramedical staff, sports wears, homefurnishing as well as common people.
37
Scalisi, Francesca. "Nanotechnology and Earth Construction: The Mechanical Properties of Adobe Brick Stabilized by Laponite Nanoparticles." Advanced Materials Research 983 (June 2014): 63–66. http://dx.doi.org/10.4028/www.scientific.net/amr.983.63.
Full textAbstract:
The contribution describes the experimental analysis for the improvement of the mechanical properties of samples of earth with the addition of Laponite nanoparticles. Were made two types of samples: the first consisting of soil, sand and water; the second consisting of soil, water, sand and Laponite nanoparticles. The operations performed were: chemical analysis of soil and sand; preparation of samples; Scanning Electron Microscope (SEM) observation of samples for the distribution of the elements, especially the Laponite nanoparticles; testing of compression strength and flexural strength of two types of samples; comparisons of the resulted of the mechanical tests. The improvement of the mechanical characteristics of the earth material using nanotechnology, will increase the use of eco-friendly, non-toxic, cost effective, available materials in architecture.
38
Pantano, Antonio, Carmelo Militello, Francesco Bongiorno, and Bernardo Zuccarello. "Analysis of the Parameters Affecting the Stiffness of Short Sisal Fiber Biocomposites Manufactured by Compression-Molding." Polymers 14, no. 1 (December 31, 2021): 154. http://dx.doi.org/10.3390/polym14010154.
Full textAbstract:
The use of natural fiber-based composites is on the rise in many industries. Thanks to their eco-sustainability, these innovative materials make it possible to adapt the production of components, systems and machines to the increasingly stringent regulations on environmental protection, while at the same time reducing production costs, weight and operating costs. Optimizing the mechanical properties of biocomposites is an important goal of applied research. In this work, using a new numerical approach, the effects of the volume fraction, average length, distribution of orientation and curvature of fibers on the Young’s modulus of a biocomposite reinforced with short natural fibers were studied. Although the proposed approach could be applied to any biocomposite, sisal fibers and an eco-sustainable thermosetting matrix (green epoxy) were considered in both simulations and the associated experimental assessment. The results of the simulations showed the following effects of the aforementioned parameters on Young’s modulus: a linear growth with the volume fraction, nonlinear growth as the length of the fibers increased, a reduction as the average curvature increased and an increase in stiffness in the x-y plane as the distribution of fiber orientation in the z direction decreased.
39
Pietrosanto, Arianna, Paola Scarfato, Luciano Di Maio, and Loredana Incarnato. "Development of Eco-Sustainable PBAT-Based Blown Films and Performance Analysis for Food Packaging Applications." Materials 13, no. 23 (November 27, 2020): 5395. http://dx.doi.org/10.3390/ma13235395.
Full textAbstract:
In this work, eco-sustainable blown films with improved performance, suitable for flexible packaging applications requiring high ductility, were developed and characterized. Films were made by blending two bioplastics with complementary properties—the ductile and flexible poly(butylene-adipate-co-terephthalate) (PBAT) and the rigid and brittle poly(lactic acid) (PLA)—at a 60/40 mass ratio. With the aim of improving the blends’ performance, the effects of two types of PLA, differing for viscosity and stereoregularity, and the addition of a commercial polymer chain extender (Joncryl®), were analyzed. The use of the PLA with a viscosity ratio closer to PBAT and lower stereoregularity led to a finer morphology and better interfacial adhesion between the phases, and the addition of the chain extender further reduced the size of the dispersed phase domains, with beneficial effects on the mechanical response of the produced films. The best system composition, made by the blend of PBAT, amorphous PLA, and the compatibilizer, proved to have improved mechanical properties, with a good balance between stiffness and ductility and also good transparency and sealability, which are desirable features for flexible packaging applications.
40
Stabile, Pietro, Federico Ballo, Gianpiero Mastinu, and Massimiliano Gobbi. "An Ultra-Efficient Lightweight Electric Vehicle—Power Demand Analysis to Enable Lightweight Construction." Energies 14, no. 3 (February 1, 2021): 766. http://dx.doi.org/10.3390/en14030766.
Full textAbstract:
A detailed analysis of the power demand of an ultraefficient lightweight-battery electric vehicle is performed. The aim is to overcome the problem of lightweight electric vehicles that may have a relatively bad environmental impact if their power demand is not extremely reduced. In particular, electric vehicles have a higher environmental impact during the production phase, which should be balanced by a lower impact during the service life by means of a lightweight design. As an example of an ultraefficient electric vehicle, a prototype for the Shell Eco-marathon competition is considered. A “tank-to-wheel” multiphysics model (thermo-electro-mechanical) of the vehicle was developed in “Matlab-Simscape”. The model includes the battery, the DC motors, the motor controller and the vehicle drag forces. A preliminary model validation was performed by considering experimental data acquisitions completed during the 2019 Shell Eco-marathon European competition at the Brooklands Circuit (UK). Numerical simulations are employed to assess the sharing of the energy consumption among the main dissipation sources. From the analysis, we found that the main sources of mechanical dissipation (i.e., rolling resistance, gravitational/inertial force and aerodynamic drag) have the same role in the defining the power consumption of such kind of vehicles. Moreover, the effect of the main vehicle parameters (i.e., mass, aerodynamic coefficient and tire rolling resistance coefficient) on the energy consumption was analyzed through a sensitivity analysis. Results showed a linear correlation between the variation of the parameters and the power demand, with mass exhibiting the highest influence. The results of this study provide fundamental information to address critical decisions for designing new and more efficient lightweight vehicles, as they allow the designer to clearly identify which are the main parameters to keep under control during the design phase and which are the most promising areas of action.
41
Yusupova, M. A., X. A. Idrisov, H. Abduxakimova, Sh Ya Eshpulatov, D. Yo Darmonov, R. B. Matxoliqov, and O. O. Mamatqulov. "Changes in the morphological structure and mechanical properties of sandy soils." IOP Conference Series: Earth and Environmental Science 1138, no. 1 (February 1, 2023): 012036. http://dx.doi.org/10.1088/1755-1315/1138/1/012036.
Full textAbstract:
Abstract The analysis of the genesis, properties of sand and sandy soils developed in different periods in Central Fergana, the changes in the agro-ecological and reclamation conditions under the influence of anthropogenic factors involves in the efficient use of land resources. The main purpose of the study is to study the genesis, geography, and formation of soils formed in sandy areas, eco-reclamation processes occurring under the influence of natural conditions and irrigation, to determine the agrochemical, physicochemical and other properties of irrigated sandy soils. The research was carried out in the field, laboratory, and cameral conditions according to generally accepted standard methods in soil science, the research used geographical, morphological, natural-historical, chemical-analytical, and cross-sectional methods. The scientific significance of the results of the study is explained by the laws of specific formation and distribution of sandy soils and irrigated sandy soils of Central Fergana, changes in the eco-reclamation state under the influence of anthropogenic factors, disclosure of physical and mechanical dynamics, productivity, conservation, and restoration.
42
Babafemi, Adewumi John, Nina Sirba, Suvash Chandra Paul, and Md Jihad Miah. "Mechanical and Durability Assessment of Recycled Waste Plastic (Resin8 & PET) Eco-Aggregate Concrete." Sustainability 14, no. 9 (May 9, 2022): 5725. http://dx.doi.org/10.3390/su14095725.
Full textAbstract:
The massive amount of plastic waste in our natural environment is a global concern. In this study, recycling plastic waste to partially replace natural sand in concrete is investigated. The performance of Resin8, a unique combination of all types of plastics and Polyethylene Terephthalate (PET) in concrete, has also been investigated. Replacement contents of 5%, 10%, and 15% for sand by volume were performed. The concrete mixes incorporating recycled plastic waste were tested against a reference concrete mix without plastic. The workability, compressive strength, tensile strength, oxygen permeability index (OPI), and effect of temperature were assessed. Scanning Electron Microscopy (SEM) analysis was conducted on the plastics and plastic concretes, pre- and post-temperature exposure. PET at a replacement content of 10% slightly increased the compressive strength by 2.4%. Regarding the OPI test, all the mixes incorporating recycled plastic waste are classified as “good”. When exposed to a temperature of 250 °C, no significant change in compressive strength was observed for the concrete mixes incorporating Resin8 at a replacement content of 15%, and the mixes incorporating PET at a replacement content of 5%, 10%, and 15%. It was clear from the results that both Resin8 and PET are suitable as a partial replacement for sand in concrete.
43
Choi, Soon, Min Lee, and Eun Shin. "One-Pot Processing of Regenerated Cellulose Nanoparticles/Waterborne Polyurethane Nanocomposite for Eco-friendly Polyurethane Matrix." Polymers 11, no. 2 (February 18, 2019): 356. http://dx.doi.org/10.3390/polym11020356.
Full textAbstract:
Regenerated cellulose nanoparticles (RCNs) reinforced waterborne polyurethanes (WPU) were developed to improve mechanical properties as well as biodegradability by using a facile, eco-friendly approach, and introducing much stronger chemical bonding than common physical bonding between RCNs and WPU. Firstly, RCNs which have an effect on improving the solubility and stability of a solution, thereby resulting in lower crystallinity, were fabricated by using a NaOH/urea solution. In addition, the stronger chemical bond between RCNs and WPU was here introduced by regarding at which stage in particular added RCNs worked best on strengthening their bond in the process of WPU synthesis. The chemical structure, mechanical, particle size and distribution, viscosity, and thermal properties of the resultant RCNs/WPU nanocomposites were investigated by Fourier transform infrared analysis (FTIR), Zeta-potential analysis, viscometer, thermogravimetric analysis (TGA), Instron, and dynamic mechanical analysis (DMA). The results of all characterizations indicated that the RCNs/WPU-DMF associated with the addition of RCNs in DMF-dispersed step resulted in more effectively crosslinked between WPU and nano-fillers of nanocellulose particles in the dispersion than Acetone and Water-dispersed steps, thereby attributing to novel interactions formed between RCNs and WPU.
44
Nallusamy, S. "Analysis of Mechanical Properties on Roselle Fibre with Polymer Matrix Reinforced Composite." Advanced Engineering Forum 16 (April 2016): 1–6. http://dx.doi.org/10.4028/www.scientific.net/aef.16.1.
Full textAbstract:
Over the past two decades it has been established that composite materials are the leading emerging materials. The natural fibres present a number of advantages over traditional synthetic fibres because of their better corrosion resistance, excellent thermo-mechanical properties and high strength to weight ratio. Also the composite materials play an important role in maintaining the eco-friendly design requirements. Among this, polymer matrix composite is one of the recent developing sectors on the composite field, because it has high strength with less density as compared to the metal matrix composite. Depending on the applications, the properties of the polymer reinforced composite are improved by modifying compositions, process of fabrication and direction of fibre etc. In this analysis the Roselle Fibre (Hibiscus Sabdariffa) is reinforced with polymer composite by wt % in the mode of compression molding. The mechanical properties of the above fabricated material were analyzed by ASTM Standards and also the characterization of polymer composites were analysed using SEM. The compressive strength and the hardness value were high as compared to other strength properties; hence it is more suitable for compressive and structural applications. The results concluded that the treated fibre with chemical reveals better compatibility with polymer matrix than that of untreated fibre.
45
Zhang, Hai Xia, Guang Li Meng, and Yue Jing Lv. "Analysis of Mechanical Behavior of Fine Sand Filling Embankment." Applied Mechanics and Materials 99-100 (September 2011): 1039–42. http://dx.doi.org/10.4028/www.scientific.net/amm.99-100.1039.
Full textAbstract:
It is serious problem of the deficiency of high quality embankment filling in the expressway construction in shanghai, the Yangtze estuary fine sand has been extensive applied as the substitute filling material to avoid destroying the cultivated land and cropland. It is signality of the fine sand filling embankment technique popularization and application to the improvement of highway construction level, the protection of the cultivated land and the protection of the eco-environment. For the natural sand is no-viscous bulk solid material with great variation on mechanical properties to traditional embankment filling, now there are some problems on the application of fine sand filling embankment engineering haven’t been analyzed such as the highway performance of fine sand filling embankment. In the paper, it analyzed the fine sand filling embankment stability by considering with the shape of landslide and safety factor by using the combination method of the strength reduction method and Fast Lagrange method. The analysis included geometrical and material properties of the slope ratio, the subgrade height, the presence or absence of the surrounding soil and the thickness of it, the top seal coat, pavement structure etc. and proposed the design suggestions of the optimum fine sand filling embankment based on the analysis above[5].
46
Arenas, Alyssa Sarah E., Chelsea Mae Escutin, and Persia Ada N. de Yro. "Mechanical Properties and Morphological Analysis of High-Density Polyethylene/Poly(Ethylene Glycol) Methacrylate/Rice Husk Composite." Materials Science Forum 1069 (August 31, 2022): 3–8. http://dx.doi.org/10.4028/p-947d0p.
Full textAbstract:
Polymers that are low-cost, lightweight, durable, and eco-friendly can be considered as one of the aims of recent research studies to solve environmental problems, especially those caused by the abundance of plastic wastes. The notable mechanical properties of such polymers could be achieved with reinforcements such as using natural fibers like hemp, sisal, wood-fiber, jute, and the focus of the study, rice husk. Using high-density polyethylene (HDPE) as the matrix, the addition of rice husk fillers was able to improve the mechanical properties of the polymer composites. However, the microstructure of the composite seems to be uneven, and voids could be observed. This must be due to disturbances or inhomogeneity in the interfacial dispersion of the filler (rice husk) and the matrix (polyethylene). This paper aims to introduce a poly (ethylene glycol) methacrylate (PEGMA) compatibilizer that can help provide stronger interfacial dispersion between the filler and matrix to improve the mechanical properties and morphology of the composite. It also offers a broader perspective regarding the possible component combinations and ratios in fabricating polyethylene which may, later on, lead to the manufacture of more efficient polyethylene-based products.
47
Bergoglio, Matteo, David Reisinger, Sandra Schlögl, Thomas Griesser, and Marco Sangermano. "Sustainable Bio-Based UV-Cured Epoxy Vitrimer from Castor Oil." Polymers 15, no. 4 (February 18, 2023): 1024. http://dx.doi.org/10.3390/polym15041024.
Full textAbstract:
Vitrimers brought new properties in thermosets by allowing their reshaping, self-healing, reprocessing, and network rearrangement without changing structural integrity. In this study, epoxidized castor oil (ECO) was successfully used for the straightforward synthesis of a bio-based solvent-free vitrimer. The synthesis was based on a UV-curing process, which proceeded at low temperatures in the absence of any solvents, and within a short time. Real time Fourier-transformed infrared spectroscopy and photo-DSC were exploited to monitor the cationic photocurable process. The UV-cured polymer networks were able to efficiently undergo thermo-activated bond exchange reactions due to the presence of dibutyl phosphate as a transesterification catalyst. Mechanical properties, thermal resistance, glass transition temperature, and stress relaxation were investigated as a function of the amount of transesterification catalyst. Mechanical properties were determined by both DMTA and tensile tests. Glass transition temperature (Tg) was evaluated by DMTA. Thermal stability was assessed by thermogravimetric analysis, whilst vitrimeric properties were studied by stress relaxation experiments. Overall, the ECO-based vitrimer showed high thermal resistance (up to 200 °C) and good mechanical properties (elastic modulus of about 10 MPa) and can therefore be considered as a promising starting point for obtaining more sustainable vitrimers.
48
Ellouzi, Imane, and Hicham Abou Oualid. "Efficient and Eco-Friendly Mechanical Milling Preparation of Anatase/Rutile TiO2-Glucose Composite with Energy Gap Enhancement." Proceedings 3, no. 1 (September 4, 2018): 3. http://dx.doi.org/10.3390/iocn_2018-1-05497.
Full textAbstract:
In the current study, Anatase/rutile TiO2 and Anatase/rutile TiO2@Glucose composites were successfully prepared by a simple method using mechanical technique. The as-prepared composite materials powders were characterized by Powder X-ray diffraction analysis (PXRD), Scanning electronic microscopy (SEM), and Solid-state UV-visible spectroscopy. X-ray patterns showed the fractional phase transformation from TiO2 anatase to rutile. SEM observations revealed that the particle shape was affected by the ball milling process. Energy-dispersive X-ray spectroscopy (EDS) analysis exhibits quantitatively the elemental composition of Ti and O. UV-Visible spectroscopy confirmed that the bandgap is slightly affected using Tauc.
49
Turco, Rosa, Rodrigo Ortega-Toro, Riccardo Tesser, Salvatore Mallardo, Sofia Collazo-Bigliardi, Amparo Chiralt Boix, Mario Malinconico, Massimo Rippa, Martino Di Serio, and Gabriella Santagata. "Poly (Lactic Acid)/Thermoplastic Starch Films: Effect of Cardoon Seed Epoxidized Oil on Their Chemicophysical, Mechanical, and Barrier Properties." Coatings 9, no. 9 (September 8, 2019): 574. http://dx.doi.org/10.3390/coatings9090574.
Full textAbstract:
In this work, biodegradable films based on poly (lactic acid) (PLA) and corn thermoplastic starch (TPS), additivated with epoxidized cardoon oil plasticizer (ECO) at 3% by weight with respect to PLA mass fraction, were prepared by melt extrusion process and compression molding. The effect of ECO on structural, thermal, mechanical, barrier, and spectral optical properties of the films was investigated. Spectroscopic analysis evidenced the development of physical interaction between oil and polymers, mainly PLA. In addition, no oil migration occurrence was detected after six months of film preparation, as evidenced by oil mass evaluation by precipitation as well as by 1H-NMR methods, thus highlighting the good inclusion of oil inside the polymeric network. The plasticizing action of the oil induced a lean improvement of the interfacial adhesion between hydrophobic PLA and hydrophilic TPS, particularly accentuated in PLA80_ECO composition, as evidenced by morphological analysis of blend fracture surfaces. TGA data underlined that, differently from TPS-based films, PLA-based systems followed one degradative thermal profile suggesting a slight compatibilization effect of epoxidized oil in these films. The shifting of Tg values, by differential scanning calorimetry (DSC) analysis, indicated a weak miscibility at molecular level. Generally, in the investigated blends, the phase separation between PLA and TPS polymers was responsible for the mechanical properties failing; in particular, the tensile strength evidenced a negative deviation from the rule of mixtures, particularly marked in TPS-based blends, where no physical entanglements occurred between the polymers since their immiscibility even in presence of ECO. The epoxidized oil strongly improved the barrier properties (water vapor permeability (WVP) and oxygen permeability (O2P)) of all the films, likely developing a physical barrier to water and oxygen diffusion and solubilization. With respect to neat PLA, PL80 and PL80_ECO films evidenced the improvement of surface wettability, due to the presence of polar groups both in TPS (hydroxyl residues) and in epoxidized oil (oxirane rings). Finally, following to the conditioning in climatic chamber at T = 25 °C and RH = 50%, PLA80 film became opaque due to TPS water absorption, causing a light transmittance decreasing, as evidenced by spectral optical analysis.
50
Habbar, Ghania, Abdelhakim Maizia, Abdelkader Hocine, João Ribeiro, and Mohamed Houcine Dhaou. "Micromechanical Analysis of a Bio-Sandwich Application for Cylinder under Pressure." Journal of Composites Science 6, no. 3 (February 23, 2022): 69. http://dx.doi.org/10.3390/jcs6030069.
Full textAbstract:
In recent years, there has been a growing replacement of synthetic fibers by natural ones, particularly by autochthonous materials. In the case of Algeria, the most abundant plant resources are the PALF (Pineapple leaf fiber), the date palm, and the Alfa fibers. In this work, the development and use of analytical and numerical methods are proposed to predict the mechanical properties of layers based on natural fibers that will be applied to manufacture skins of the sandwich cylinder. To achieve these predictions, four analytical models were used, namely the Halpin–Tsai, the Chamis, the Hashin vs. Rosen, and the ROM. The analytical results were compared with the numerical simulations and experimental data. The prediction of the elastic properties of the three fiber-based eco-composites showed an important dispersion in terms of stiffness.