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Статті в журналах з теми "Eco-mechanical analysis"
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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.
Повний текст джерелаАнотація:
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.
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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.
Повний текст джерелаАнотація:
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.
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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.
Повний текст джерелаАнотація:
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.
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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.
Повний текст джерела
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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.
Повний текст джерелаАнотація:
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.
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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.
Повний текст джерелаАнотація:
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.
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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.
Повний текст джерелаАнотація:
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.
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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.
Повний текст джерелаАнотація:
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.
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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.
Повний текст джерелаАнотація:
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.
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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.
Повний текст джерелаАнотація:
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.
Дисертації з теми "Eco-mechanical analysis"
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Enoksson, Frida. "Implementering av ekodesignmetoder i Nobias befintliga designprocess." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-13644.
Повний текст джерелаАнотація:
Examensarbetet har genomförts vid Högskolan i Skövde i samverkan med Nobia AB. Målet var att implementera ekodesignmetoder i Nobias befintliga designprocess och att genomföra en fallstudie på en kökslucka. Fallstudien genomfördes för att verifiera ekodesignprocessen och för att föreslå ett lämpligt material till en kökslucka. Under litteraturstudien undersöktes begrepp såsom hållbar utveckling, ekodesign och livscykel. Intervjuer genomfördes för att undersöka Nobias designprocess och för att identifiera aktiviteterna i varje fas i processen. Faserna var Idégenerering, Konceptutveckling, Produktutveckling och Industrialisering. Flera alternativa ekodesignmetoder studerades för att undersöka om de var lämpliga att implementera i Nobias befintliga designprocess, bland annat Statusanalys och olika Checklistor. De förväntade egenskaperna för ekodesignprocessen sammanställdes i en kravspecifikation. Ekodesignmetoderna som implementerades i Nobias befintliga designprocess resulterade i en ekodesignprocess, som bestod av Ekostrategihjul, Philips five fast, Jämförelsematris, Ekodesignportfolio, Miljöriskanalys och Scorecard. Fallstudien inleddes med skapandet av en kravspecifikation beträffande materialets förväntade egenskaper. De mest intressanta materialen var Medium Density Fibreboard, bambu och gran. Genom en analys av olika material ansågs gran vara det bästa materialet, eftersom det medförde minst utsläpp vid transport, tillgången är god samt är lokalt producerat. Det framkom att tillämpningen av ekodesign inom produktutveckling medför många fördelar, som till exempel en trivsam arbetsplats, motiverade medarbetare och en mer hållbar designprocess. En hållbar designprocess bidrar till att utveckla hållbara produkter, vilket bidrar till en bättre miljö.The bachelor project has been carried out at the University of Skövde in collaboration with Nobia AB. The purpose of the project was to implement eco-design methods into the company’s existing design process and to accomplish a case study of a cabinet door. The purpose of the case study was to verify the proposed eco-design process and suggest a material for a cabinet door. Sustainable development, eco-design and lifecycle were studied during the literature study. Interviews were carried out to study the design process at Nobia and to identify the different activities in every phase of the process. The phases were Idea Generation, Concept Development, Product Development and Industrialization. Several eco-design methods were studied to assess their potential to be implemented into Nobia’s existing design process, for example Status Analysis and various Checklists. The expected characteristics of the eco-design process were compiled into a requirement specification. The methods which were implemented into Nobia’s existing design process resulted in an Eco-design process which consisted of Ekostrategihjul, Philips five fast, Jämförelsematris, Eco-design portfolio, Environmental Failure Mode and Effect Analysis and Scorecard. The case study was initiated by compiling a requirement specification. The most promising materials were Medium Density Fibreboard, bamboo and fir. Through analysis of various materials fir was considered as the best material because of low levels of pollution during transportation, good access to the raw material and it is also locally manufactured. The results show that the use of eco-design within product development entails many advantages, such as, a pleasant place of work, motivated staff, and a more sustainable design process. A sustainable design process will contribute to the development of sustainable products, which entails a better environment.
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"Feasibility Study of Use of Renewable Energy to Power Greenfield Eco-Industrial Park." Master's thesis, 2014. http://hdl.handle.net/2286/R.I.27383.
Повний текст джерелаАнотація:
abstract: An eco-industrial park (EIP) is an industrial ecosystem in which a group of co-located firms are involved in collective resource optimization with each other and with the local community through physical exchanges of energy, water, materials, byproducts and services - referenced in the industrial ecology literature as "industrial symbiosis". EIPs, when compared with standard industrial resource sharing networks, prove to be of greater public advantage as they offer improved environmental and economic benefits, and higher operational efficiencies both upstream and downstream in their supply chain.
Although there have been many attempts to adapt EIP methodology to existing industrial sharing networks, most of them have failed for various factors: geographic restrictions by governmental organizations on use of technology, cost of technology, the inability of industries to effectively communicate their upstream and downstream resource usage, and to diminishing natural resources such as water, land and non-renewable energy (NRE) sources for energy production.
This paper presents a feasibility study conducted to evaluate the comparative environmental, economic, and geographic impacts arising from the use of renewable energy (RE) and NRE to power EIPs. Life Cycle Assessment (LCA) methodology, which is used in a variety of sectors to evaluate the environmental merits and demerits of different kinds of products and processes, was employed for comparison between these two energy production methods based on factors such as greenhouse gas emission, acidification potential, eutrophication potential, human toxicity potential, fresh water usage and land usage. To complement the environmental LCA analysis, levelized cost of electricity was used to evaluate the economic impact. This model was analyzed for two different geographic locations; United States and Europe, for 12 different energy production technologies.
The outcome of this study points out the environmental, economic and geographic superiority of one energy source over the other, including the total carbon dioxide equivalent emissions, which can then be related to the total number of carbon credits that can be earned or used to mitigate the overall carbon emission and move closer towards a net zero carbon footprint goal thus making the EIPs truly sustainable.Dissertation/Thesis
LCOE calculation charts
Gabi Life-cycle analysis
Masters Thesis Mechanical Engineering 2014
Частини книг з теми "Eco-mechanical analysis"
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Gaurav and Raj Kumar. "Analysis of Solar Ejector–Jet Refrigeration System Using Eco-Friendly Material R1234yf." In Lecture Notes in Mechanical Engineering, 831–38. New Delhi: Springer India, 2016. http://dx.doi.org/10.1007/978-81-322-2740-3_80.
Повний текст джерела
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Favi, Claudio, Marco Marconi, Marta Rossi, and Federica Cappelletti. "Product Eco-Design in the Era of Circular Economy: Experiences in the Design of Espresso Coffee Machines." In Lecture Notes in Mechanical Engineering, 194–99. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70566-4_31.
Повний текст джерелаАнотація:
AbstractProduct eco-design includes several methodologies aimed at supporting companies in the development of sustainable products. Currently, this theme is assuming an important role in both the academia and industry worlds due to the increasing attention to environmental problems and the need for a transition toward circular economy business/organizational models. In this context, the present paper focuses on the industrial sector of espresso coffee machines manufacturing which has several unexploited potentialities. The analysis of the sector specificity (internal and external contexts), as well as of the product lifecycle allowed to define an eco-design framework to guide companies involved in the design and production of espresso coffee machines. Effective eco-design strategies should include the combined use of specific methods, tools and metrics to manage all the most important lifecycle phases (beginning of life, middle of life, end of life) during the design activities in order to set preventive actions that avoid future potential environmental impacts. Only in this way, the environmental and economic benefits of the circular economy paradigm (e.g. remanufacturing/reuse of selected components) can be practically exploited in real industrial contexts. The presented case studies confirmed that the application of design for disassembly rules positively contributes to increase the product performances during maintenance and end of life, while a re-design oriented to component modularity could be a key strategy to pursue remanufacturing for boilers, a key and expensive component included in espresso coffee machines.
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Devikala, Sundaramurthy, and Johnson Maryleedarani Abisharani. "Green Synthesis of TiO2 Nanoparticles Using Averrhoa Bilimbi Fruits Extract and DPT-PEG Polymer Electrolyte for Enhance Dye-Sensitized Solar Cell Application." In Dyes and Pigments - Insights and Applications [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.106944.
Повний текст джерелаАнотація:
Green synthesis of nanoparticles has grown substantial interest as a developing technology to reduce the toxicity of metal oxide commonly associated with conventional physical and chemical synthesis methods. Among these, green synthesis of nanoparticles from plants parts to be a very active method in developing nontoxic, eco-friendly and clean technology. We prepared green synthesized TiO2 using a fruits extract of Averrhoa bilimbi with a cost effective and non-toxic method and reports better PCE of DSSCs application. The green synthesized TiO2 nanoparticles (working electrode) with DPT dopant PEG polymer electrolyte shows better power conversion efficiency in dye-sensitized solar cells. The green TiO2 was characterized with XRD, UV, FTIR, SEM, TEM and EDX techniques analysis the band gap, crystallite size and shape for green synthesized TiO2 nanoparticles. The electrical and mechanical properties of DPT organic doped PEG/KI/I2 polymer electrolyte were characterized with XRD, FTIR, EIS, DSC and TGA and it was analysis that the DPT well miscible with PEG polymer electrolyte and improves the electrical conductivity and enhances the efficiency of DSSC.
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Kumar, Rajneesh, Prabhat Agnihotri, Rohit Kumar, Pradyumn Yadav, and Pawan Kumar Arora. "Review on Process Parameters of FDM and Their Impact on Flexure Strength of Additive Manufacturing Specimen." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220807.
Повний текст джерелаАнотація:
Lately, analysts and researchers are dealing with issues regarding natural unevenness and a worldwide temperature alteration inferable from various utilization of composite materials arranged by manufactured strands and petrochemical polymers. Subsequently, a rising consideration has been dedicated to the innovative work of polymer composites supported with the normal filaments. The normal strands are the most reasonable option of engineered filaments because of their biodegradability, eco-benevolence and mechanical properties. The normal strands are drawing in the specialists and researchers to take advantage of their properties by amalgamating them with the polymer. The properties of normal fiber built up polymer composites basically rely on different factors, for example, properties of filaments and lattices, fiber stacking rate, size and direction of strands, stacking groupings, level of interfacial holding, fiber surface medicines, hybridization and fuse of added substances and coupling specialists. Elastic and flexural tests are the main examinations to foresee the uses of the materials. A lot of exploration has been done of flexural properties of regular fiber supported polymer. In this paper, a survey on weakness and flexural properties of regular fiber supported polymer as far as impacts of fiber process parameter like Layer thickness, Infill density, Extrusion temperature, print speed using 3-D printer and process of fused deposition modelling (FDM). So, Analysis of data we have used Taguchi Analysis and compared with ANN (Artificial Neural Networks). Additionally, late utilizations of regular fiber supported polymer are likewise introduced in this review.
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Anbupalani, M. S. "Polymer Natural Fibre Composites and its Mechanical Characterization." In Materials Research Foundations, 238–55. Materials Research Forum LLC, 2022. http://dx.doi.org/10.21741/9781644901854-10.
Повний текст джерелаАнотація:
Increasing environmental concern and the dynamic market demand is a driving force for eco-friendly materials, therefore researchers focus on developing biodegradable materials for various applications. Bio- composites are one such eco-friendly material utilizing the advantages of polymer matrix and natural fibre reinforcement. Natural fibre composites are replacing environmentally harmful synthetic materials with better mechanical properties and they have potential applications in different fields like biomedical applications, construction materials, defence, automobiles etc., In addition, they are economically feasible and require low energy for production. Analysing the mechanical characteristics of natural fibre reinforced polymers are crucial to fine tune their utilization and processing techniques. This chapter aims to provide an overview of the mechanical characteristics of NFCs reinforced polymer composites and the details of milestones made with them.
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Bertagna, Serena, Pasqualino Corigliano, Vincenzo Crupi, and Alberto Marinò. "On the Structural Response of Bio-Based Adhesives for Wooden Hulls." In Progress in Marine Science and Technology. IOS Press, 2022. http://dx.doi.org/10.3233/pmst220024.
Повний текст джерелаАнотація:
In the last years, the idea of implementing greener and sustainable solutions merged with the basic principles of life cycle assessment concept has turned to be of paramount importance for the boatbuilding industry. In this framework, construction technologies based on wood such as strip-planking represent possible solutions, as they allow the use of a natural-grown material for attaining refined and solid structures. However, since these techniques imply wood bonding through conventional epoxy adhesives, the global eco-friendliness of the final product is lowered. As a consequence, the adoption of innovative bio-based adhesives is a promising solution to investigate. It is known that, generally, bonded joints in wooden hulls are weak spots of the structure, so the performances of the used adhesives should be duly assessed in order to guarantee an effective bonding. In the present research activity, the assessment of the performances of bonded joints manufactured with bio-adhesives is carried out through a FEM-based methodology, starting from the data present in both technical datasheets and literature for the materials used. In such a way, the most promising products can be preliminarily identified in order to deeply investigate their mechanical characteristics through experimental tests, so limiting expensive and time-consuming activities. The proposed methodology was validated through the comparison between the results coming from the FE analysis and the ones stemming from experimental tests. Moreover, the proposed methodology could be profitably used to analyse more complex geometries, such as real and large structures of wooden hulls.
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Benavente, Rut, Maria Dolores Salvador, and Amparo Borrell. "Design and Development of Zirconia-Alumina Bioceramics Obtained at Low Temperature through Eco-Friendly Technology." In Smart and Advanced Ceramic Materials and Applications [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.102903.
Повний текст джерелаАнотація:
Ceramics are increasingly used as structural materials with biomedical applications due to their mechanical properties, biocompatibility, esthetic characteristics and durability. Specifically, zirconia-based compounds are commonly used to develop metal-free restorations and dental implants. The consolidation of ceramics is usually carried out through powders by means of processes that require a lot of energy, as long as processing times and high temperatures (over 1400°C) are required. In the recent years, new research is being developed in this field to reduce both energy consumption and processing time of ceramic powders. One of the most promising techniques for sintering ceramics is microwave heating technology. The main objective of this chapter is to obtain highly densified zirconia-alumina compounds by microwave technology. After sintering, the materials are characterized to determine whether the final properties meet the mechanical requirements for their final applications as dental material. Finally, the characterization of specimens treated by low-temperature degradation (LTD) is carried out after each 20 h of LTD exposure up to 200 h. In addition, the quantification of monoclinic phase by micro-Raman spectroscopy, analysis by AFM and Nomarski optical microscopy and assessment of the roughness and mechanical properties (hardness and Young’s modulus) by nanoindentation technique have been studied.
Тези доповідей конференцій з теми "Eco-mechanical analysis"
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Alzebdeh, Khalid I., Mahmoud M. A. Nassar, and Nasr Al-Hinai. "Development of New Eco-Composites From Natural Agro-Residues and Recycled Polymers." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23536.
Повний текст джерелаАнотація:
Abstract Wood plastic composite materials have shown a remarkable performance in various applications due to its inherent properties like strength, durability, and lightweight over conventional composite materials. However, utilization of wood as an organic filler for polymers poses a serious negative impact to the green areas. Therefore, utilization of agro-residues as organic fillers instead of wood offers a sustainable solution to the aforementioned problem. In this context, this study aims to investigate the potential use of date palm pedicel agro-residues as natural fillers in eco-composites in which recycled post-consumer polypropylene is used as a matrix. Three levels of date palm flour content, namely, 10 v.%, 20 v.% and 30 v.% are used. The influence of the date palm pedicels flour content on the mechanical, physical and thermal behavior of the developed eco-composites is examined. Material properties of the fabricated eco-composites are characterized experimentally according to ASTM standards. Thermogravimetric analysis (TGA) is also performed to assess the thermal decomposition of the developed composites. Moreover, the morphology of fractured regions is captured using Scanning Electron Microscope (SEM). Generally, adding natural fillers to the polymer matrix is a cost effective option. However, it also slightly affects tensile strength, elongation, and flexural strength at break and enhance the Young’s modulus compared to the neat polypropylene. Interestingly, it is observed that the recycled polypropylene based composites are more repellent to water absorption in comparison to the virgin polypropylene-based composites. This attribute might be due to the surface quality transformation for the reprocessed plastic polymer.
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Sleiti, Ahmad K., and Mohammed Al-Khawaja. "Heat Transfer Analysis of Regenerative Thermo-Mechanical Refrigeration System." In ASME 2020 Heat Transfer Summer Conference collocated with the ASME 2020 Fluids Engineering Division Summer Meeting and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ht2020-8901.
Повний текст джерелаАнотація:
Abstract Refrigeration systems contribute to the critical environmental concerns including global warming and ozone depletion. It is necessary to develop new systems that use renewable energy resources and waste heat to perform the cooling function with eco-friendly working fluids. This improves the energy efficiency of the power systems and minimizes the harmful effects of conventional refrigeration systems. This paper introduces an analysis of a regenerative thermo-mechanical refrigeration system that is powered with renewable heat sources (solar, geothermal) or waste heat (from internal combustion engines, gas power plants, and steam power plants). The system operates at the supercritical conditions of the working fluids. The performance of the system is evaluated based on power efficiency, the COP, and the expander-compressor diameters. Also, a number of working fluids were compared with each other based on their performance and environmental effects. There is a trade-off between high-performance fluids and their environmental effects. Using R32 as a working fluid at Th = 150 °C and Tc1 = 40 °C, the system produces a cooling capacity of 1 kW with power efficiency of 10.23%, expander diameter of 53.12 mm and compressor diameter of 75.4mm. The regenerator increases the power efficiency by about 1%. However, the size of the regenerator is small (Dr = 6.5 mm, Lr = 142 mm].
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Mertz, George A., Gregory S. Raffio, Kelly Kissock, and Kevin P. Hallinan. "Conceptual Design of Net Zero Energy Campus Residence." In ASME 2005 International Solar Energy Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/isec2005-76199.
Повний текст джерелаАнотація:
In response to both global and local challenges, the University of Dayton is committed to building a net-zero energy student residence, called the Eco-house. A unique aspect of the Eco-house is the degree of student involvement; in accordance with UD’s mission, interdisciplinary student teams from mechanical engineering, civil engineering and the humanities are leading the design effort. This paper discusses the conceptual design of a net-zero energy use campus residence, and the analysis completed thus far. Energy use of current student houses is analyzed to provide a baseline and to identify energy saving opportunities. The use of the whole-system inside-out approach to guide the overall design is described. Using the inside-out method as a guide, the energy impacts of occupant behavior, appliances and lights, building envelope, energy distribution systems and primary energy conversion equipment are discussed. The design of solar thermal and solar photovoltaic systems to meet the hot water and electricity requirements of the house is described. Eco-house energy use is simulated and compared to the energy use of the existing houses. The analysis shows the total source energy requirements of the Eco-house could be reduced by about 340 mmBtu per year over older baseline houses, resulting in CO2 emission reductions of about 54,000 lb per year and utility cost savings of about $3,000 per year. Detailed cost analysis and cost optimization have not been performed but are critical aspects of the UD Eco-house project, which will be performed in the future.
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Stelescu, Maria Daniela, Daniela Ioana Constantin, Maria Sonmez, Laurentia Alexandrescu, Mihaela Nituica, and Mihai Georgescu. "Development of elasto-plastic eco-nano-materials for the footwear industry." In The 8th International Conference on Advanced Materials and Systems. INCDTP - Leather and Footwear Research Institute (ICPI), Bucharest, Romania, 2020. http://dx.doi.org/10.24264/icams-2020.iv.22.
Повний текст джерелаАнотація:
The paper refers to the obtaining of new types of eco-nano elasto-plastic materials with high-performance characteristics based on ethylene-propylene-terpolymer rubber (EPDM), high-density polyethylene (HDPE), plasticized starch and organically modified montmorillonite (OMMT). The new materials were obtained by the technique of dynamic vulcanization and melt intercalation in a Plasti-Corder Brabender internal mixer, at 80 rpm and a temperature of 170°C. The influence of using the OMMT type nanofiller and the plasticized starch filler on the characteristics was observed. The new materials have a melt flow index of over 12g/10 min at 180°C for a force of 10 kg, which allows injection processing - an ecological method of processing polymeric materials. The samples show very good physical-mechanical characteristics both in the normal state and after accelerated aging at 168 hours at 170°C (tensile strength over 16 N/ mm2, tear strength over 102 N/mm, hardness 55-59°ShD, elasticity over 30%, etc.). The materials show high values of abrasion resistance (below 30 mm3), and very good results for mass and volume variation after 22 hours at 23°C in: water, acids and concentrated bases. These characteristics are due both to the composition of the new materials and to the obtaining technology. For evaluating the structural modification, analysis of the FT-IR spectral of the samples was carried out. The new materials can be used in different fields such as: in the footwear industry (soles, heels and plates), safety equipment (boots, etc), obtaining gaskets, hoses, technical rubber products for cars etc.
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Pompidou, Stéphane, Marion Prinçaud, Nicolas Perry, and Dimitri Leray. "Recycling of Carbon Fiber: Identification of Bases for a Synergy Between Recyclers and Designers." In ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82106.
Повний текст джерелаАнотація:
In order to decrease both energy consumption and CO2 emissions, the automotive, aeronautics and aerospace industries aim at making lighter vehicles. To achieve this, composite materials provide good opportunities, ensuring high material properties and free definition of geometry. As an example, for cold applications, the use of carbon fiber/thermoset composites is ever increasing, in spite of a high fiber price. But in a global and eco-friendly approach, the major limitation for their use remains their potential recyclability. Recycling a composite means having a recycling technology available, getting a dismantle solution and an access for the product, and disposing identification plus selection possibilities to the materials. Thus, carbon fibers recovery (i.e. recycling and re-processing) would both help design engineers to balance energy efficiency and cost, and open new opportunities for developing second-life composites, dedicated to the manufacture of medium or low loaded parts (non-structural in many cases). A first section presents an overview of composite recycling possibilities. Indeed, environmentally and economically, composite incineration is not attractive (even with an energetic valorization), let-alone burying. Reuse and recycling thus remain the two most interesting options. Aeronautics offers a high potential in terms of fiber deposit. In southwest France, composites recycling will increase in terms of quantity due to dismantling platforms Tarmac (dedicated to civil aircraft applications) and P2P (for the disassembly of ballistic weapons). In addition, from a technical point of view, and even if end-of-life solutions for composites still remain under development, solvolysis (i.e. water under supercritical conditions) already offers the opportunity to recover carbon fibers. The resulting recyclate retains up to 90 percent of the fiber’s mechanical properties. A second part will explore the recycling to design issue (i.e. how recycling processes have to balance the previous aspects of the end-of-life proposal). The recycler clearly becomes a new supplier in the carbon fiber lifecycle, by revalorizing wastes with alternatives to burning. Moreover, increasing carbon fiber shelf life reduces its product life impact. Finally, promoting carbon fiber end-of-life would ensure to link aeronautics, automotive, and leisure and sports industries; but one can create demand for recycled reinforcement, by packaging it in useful and attractive forms for those end-users (e.g. pseudo-continuous fiber, felt, strips, bands, patches, etc.). These sections will be enlightened by several examples from collaborations between I2M and local industries.
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Guo, Hong, Steven Keil, John Ackerman, Ivan Puchades, Brian Landi, and Patricia Iglesias. "The Effects of Single-Walled Carbon Nanotubes and Ionic Liquids in Reduction of Friction and Wear." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86703.
Повний текст джерелаАнотація:
A significant amount of energy dissipates from frictional losses of moving components in machinery and devices in industry. This contact friction leads to the wear and eventual failure of industrial mechanical components over extended time through adhesion, abrasion, fatigue, or corrosion. Frictional losses could be mitigated by utilizing more effective lubricants, which would allow the translating surfaces to slide over one another more fluently. There is reason to study eco-friendly alternatives over traditional lubricants to reduce negative impact to the environment. The implementation of Ionic Liquids (ILs) as additives to oil-based lubricants is a development in tribology with the potential to lower the friction coefficient and reduce wear. When carbon nanotubes are dispersed into these ionic liquids, the reduction of losses due to friction and wear can be even greater. In this experiment, single-walled carbon nanotubes (SWCNTs) of four concentrations, 0 wt.%, 0.01 wt.%, 0.02 wt.%, and 0.03 wt.% were dispersed in a room temperature ionic liquid, Trihexyl(tetradecyl)phosphonium bis(2,4,4-trimethylpentyl) phosphinate, or [THTDP][Phos] for short, to form four homogeneous mixtures. Then, each mixture was added in 1 wt.% to a base vegetable oil. Friction tests were also conducted with pure vegetable oil for comparative purposes. The experiments consist of a pin-on-disk rotational tribometer and a ball-on-flat reciprocating tribometer both applying a steel-steel (AISI 52100) contact to evaluate the lubricating ability of combining SWCNTs and ILs as lubricant additives. The load, speed, wear radius, sliding distance, and duration of the experiment were held constant to isolate lubrication as the experimental parameter. Optical microscopy (OM), thermogravimetric analysis (TGA), and viscometer analysis were utilized after experimentation to analyze and discuss the wear mechanisms of the worn surfaces. Results differed between rotational and translational experiments, with the rotational results yielding a decrease of 14.21% in wear loss with the VO+1%[THTDP][Phos] lubricant. The translational results yielded a continuous decrease in wear loss with the increase in SWCNT wt.%.
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Vilarinho, Cândida, André Ribeiro, Joana Carvalho, Jorge Araújo, Manuel Eduardo Ferreira, and José Teixeira. "Development of a Methodology for Paint Dust Waste Energetic Valorization Through RDF Production." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71979.
Повний текст джерелаАнотація:
Industrial activity of aluminum surface coating, namely by electrostatic painting with a polyester powder based resin, generates a significant array of wastes. Among these wastes, paint dust is classified as 08 01 12 on the European List of Wastes. As consequence of the inexistence of adequate treatment routes for its correct management, this waste is currently landfilled, without any energy and / or material recovery. Therefore, the development of proper waste management technologies in line with the environmental policies is imperative in order to improve the industrial competitiveness and to preserve the natural resources. In the present work, RDFs (Refused Derived Fuel) were produced, as pellets, for energetic valorization. These experimental RDF pellets were manufactured by mixing the industrial paint dust with sawdust (1.5 and 3%) and with paperboard (1.5%). They were subsequently tested on a purpose built experimental boiler and the combustion efficiency was assessed in terms of gaseous emissions and chemical composition of the bottom and fly ashes. The paint dust waste was delivered by a local surface treatment company and characterized concerning chemical, physical and eco toxicological properties, proving to be rich in Carbon (50.2%) and Hydrogen (4.73%). The obtained RDFs were characterized for mechanical durability, elemental and chemical analysis, bulk density and lower heating value. Results show that the utmost lower heating value (19670 kJ/kg) was obtained for the maximum incorporation content of paint dust waste tested (3%). Combustion trials were carried out at a fuel flow rate between 2 and 3 kg/h. The results showed that the incorporation of paint dust waste resulted in a decrease of the thermal efficiency which suggests that the air fuel ratio was not properly adjusted to the varying heat value of the fuel blend. For all the tests, the mass flow rate and the quality of the gaseous emissions were evaluated for the most relevant pollutants such as particles, SO2, TOC, CO and NOx. All parameters, except for particles in one single case, comply with strict environmental limits applicable. Samples of ashes have also been collected and their chemical composition correlated with the fusibility behavior. The results show that such levels of incorporation could be an effective process for paint dust waste management from both the environmental and energetic points of view.
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Gheorghe, Razvan, and Kosuke Ishii. "Eco-Design Value Alignment: Keys to Success." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-41228.
Повний текст джерелаАнотація:
This article analyzes the eco-design challenges in the 21st century. In a world of globalization and outsourcing, environmental legislation became a main driver for doing eco-design. Eco-innovation and green money are concepts to create marketing advantages and differentiation from their competitors, transforming a legislative handicap into financial benefits and societal recognition. This paper introduces Life cycle Environmental Value Chain Analysis (LC-EVCA) and Environmental Worth Analysis (EWA) to identify the stake-holders implementing environmental improvement programs and the value relationships among them. Life cycle information and societal concerns are the keys to success for the eco-design value alignment. Philips environmental programs and a brief example illustrate how eco-design can be integrated into product development, and how both customer (society) and producers find themselves in a win-win situation.
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Roth, Brian D., and Ilan M. Kroo. "Enhanced Collaborative Optimization: A Decomposition-Based Method for Multidisciplinary Design." In ASME 2008 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/detc2008-50038.
Повний текст джерелаАнотація:
Astute choices made early in the design process provide the best opportunity for reducing the life cycle cost of a new product. Optimal decisions require reasonably detailed disciplinary analyses, which pose coordination challenges. These types of complex multidisciplinary problems are best addressed through the use of decomposition-based methods, several of which have recently been developed. Two of these methods are collaborative optimization (CO) and analytical target cascading (ATC). CO was conceived in 1994 in response to multidisciplinary design needs in the aerospace industry. Recent progress has led to an updated version, enhanced collaborative optimization (ECO), that is introduced in this paper. ECO addresses many of the computational challenges inherent in CO, yielding significant computational savings and more robust solutions. ATC was formalized in 2000 to address needs in the automotive industry. While ATC was originally developed for object-based decomposition, it is also applicable to multidisciplinary design problems. In this paper, both methods are applied to a set of test cases. The goal is to introduce the ECO methodology by comparing and contrasting it with ATC, a method familiar within the mechanical engineering design community. Comparison of ECO and ATC is not intended to establish the computational superiority of either method. Rather, these two methods are compared as a means of highlighting several promising approaches to the coordination of distributed design problems.
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Zhou, Yi, Kayvan Pazouki, and Rose Norman. "The Modelling and Optimal Control of a Hybrid Propulsion System for an Ice-Capable Ship." In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-95142.
Повний текст джерелаАнотація:
Abstract Due to the effect of global warming, navigation on the Northern Sea Route (NSR) has become a more economical and reliable choice for international cargo transportation. In some ways, global warming has increased the opportunity of shipping activities in the Arctic region and hence the need for ice-capable vessels. NSR shipping provides benefits for international trade, but challenges still exist. Although conventional direct drive propulsion system connected to 2 stroke marine engine is normally considered the most efficient approach for long-range transport, for icebreaking operation which requires prime movers to work at partial load, conventional mechanical propulsion systems generally have poor fuel efficiency and high emissions. Moreover, the harmful gases produced by ships trading in NSR have a significant impact on the Arctic climate. Moreover, a traditional mechanical drive icebreaker with a diesel engine is required to operate at high torque, low rpm during icebreaking operation. Thus conventional diesel engine that isn’t optimised to operate at this point would be inefficient and would produce black carbon due to incomplete combustion, which has the potential to cause ice, snow, and cloud albedo out of proportion with normal pattern, thus lead to serious impacts on the Arctic environment and eco-system. Arctic ship propulsion systems have been developing since the 19th century, with modifications such as the use of diesel electric propulsion systems and nuclear power propulsion systems which can ideally meet the requirements of ice breaking operation (low speed and high torque), however, drawbacks still exist in these systems, such as poor fuel efficiency at low speeds for diesel electric propulsion and for nuclear power, there are limitations such as high initial cost, management of nuclear waste and the fact that the required deep knowledge of nuclear technology is mastered by few countries. Hybrid propulsion is a new technology for ice-capable ships, which can address the partial loading efficiency problem in diesel-electric propulsion by charging and discharging a battery energy storage unit which can allow the ship to work in zero-emission mode in some sensitive areas. In this paper, detailed modelling, primary control strategies (voltage and frequency stability) and efficiency analysis of system components such as the motor, generator, battery and conversion devices etc. are and implemented in software, and then the whole power system is simulated with a secondary control strategy (load power sharing and battery aging concern) in both ice and open water load conditions. The results from the diesel electric system and hybrid system total fuel consumption within a target journey are compared to investigate the advantage of the hybrid system, which show up to a 40% fuel consumption reduction for hybrid propulsion arrangement. A tertiary control strategy for energy management is analysed and implemented in the system to further reduce system fuel consumption.
Звіти організацій з теми "Eco-mechanical analysis"
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Whisler, Daniel, Rafael Gomez Consarnau, and Ryan Coy. Novel Eco-Friendly, Recycled Composites for Improved CA Road Surfaces. Mineta Transportation Institute, July 2021. http://dx.doi.org/10.31979/mti.2021.2046.
Повний текст джерелаАнотація:
The continued use of structural plastics in consumer products, industry, and transportation represents a potential source for durable, long lasting, and recyclable roadways. Costs to dispose of reinforced plastics can be similar to procuring new asphalt with mechanical performance exceeding that of the traditional road surface. This project examines improved material development times by leveraging advanced computational material models based on validated experimental data. By testing traditional asphalt and select carbon and glass reinforced composites, both new and recycled, it is possible to develop a finite element simulation that can predict the material characteristics under a number of loads virtually, and with less lead time compared to experimental testing. From the tested specimens, composites show minimal strength degradation when recycled and used within the asphalt design envelopes considered, with an average of 49% less wear, two orders of magnitude higher compressive strength, and three orders for tensile strength. Predictive computational analysis using the validated material models developed for this investigation confirms the long-term durability.