Articoli di riviste: "Mechanial behavior"

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Wang, Haitao, Wenxiang Hua, Zhengyan Wang e Yanlei Yang. "ICOPE-15-C066 Local mechanical behavior and damage mechanism for high temperature rotor considering steady and transient operation". Proceedings of the International Conference on Power Engineering (ICOPE) 2015.12 (2015): _ICOPE—15——_ICOPE—15—. http://dx.doi.org/10.1299/jsmeicope.2015.12._icope-15-_150.

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Green, P. A., M. J. McHenry e A. Rico-Guevara. "Mechanoethology: The Physical Mechanisms of Behavior". Integrative and Comparative Biology 61, n. 2 (14 giugno 2021): 613–23. http://dx.doi.org/10.1093/icb/icab133.

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Abstract Research that integrates animal behavior theory with mechanics—including biomechanics, physiology, and functional morphology—can reveal how organisms accomplish tasks crucial to their fitness. Despite the insights that can be gained from this interdisciplinary approach, biomechanics commonly neglects a behavioral context and behavioral research generally does not consider mechanics. Here, we aim to encourage the study of “mechanoethology,” an area of investigation intended to encompass integrative studies of mechanics and behavior. Using examples from the literature, including papers in this issue, we show how these fields can influence each other in three ways: (1) the energy required to execute behaviors is driven by the kinematics of movement, and mechanistic studies of movement can benefit from consideration of its behavioral context; (2) mechanics sets physical limits on what behaviors organisms execute, while behavior influences ecological and evolutionary limits on mechanical systems; and (3) sensory behavior is underlain by the mechanics of sensory structures, and sensory systems guide whole-organism movement. These core concepts offer a foundation for mechanoethology research. However, future studies focused on merging behavior and mechanics may reveal other ways by which these fields are linked, leading to further insights in integrative organismal biology.

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Huang, Haibo, Cihai Dai, Hao Shen, Mingwei Gu, Yangjun Wang, Jizhu Liu, Liguo Chen e Lining Sun. "Recent Advances on the Model, Measurement Technique, and Application of Single Cell Mechanics". International Journal of Molecular Sciences 21, n. 17 (28 agosto 2020): 6248. http://dx.doi.org/10.3390/ijms21176248.

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Since the cell was discovered by humans, it has been an important research subject for researchers. The mechanical response of cells to external stimuli and the biomechanical response inside cells are of great significance for maintaining the life activities of cells. These biomechanical behaviors have wide applications in the fields of disease research and micromanipulation. In order to study the mechanical behavior of single cells, various cell mechanics models have been proposed. In addition, the measurement technologies of single cells have been greatly developed. These models, combined with experimental techniques, can effectively explain the biomechanical behavior and reaction mechanism of cells. In this review, we first introduce the basic concept and biomechanical background of cells, then summarize the research progress of internal force models and experimental techniques in the field of cell mechanics and discuss the latest mechanical models and experimental methods. We summarize the application directions of cell mechanics and put forward the future perspectives of a cell mechanics model.

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Bueno, S., e C. Baudín. "Comportamiento mecánico de materiales cerámicos estructurales". Boletín de la Sociedad Española de Cerámica y Vidrio 46, n. 3 (30 giugno 2007): 103–18. http://dx.doi.org/10.3989/cyv.2007.v46.i3.241.

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García Santos, Alfonso. "Comportamiento mecánico de yeso reforzado con polímeros sintéticos". Informes de la Construcción 40, n. 397 (30 ottobre 1988): 67–89. http://dx.doi.org/10.3989/ic.1988.v40.i397.1550.

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Appoothiadigal, M. "Mechanical Behaviour of AZ31 Mg/Ti Composites". International journal of Emerging Trends in Science and Technology 03, n. 12 (15 dicembre 2016): 4855–57. http://dx.doi.org/10.18535/ijetst/v3i12.09.

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Liu, Guo Ning, Hua Dong Zhao, Qian Qian Guo e Sheng Gang Ma. "A Simple Model for Mechanical Behavior of PET Thin Film Deposited with Pure Aluminum on Both Surfaces and the Experimental Study". Advanced Materials Research 602-604 (dicembre 2012): 1488–91. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.1488.

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A commercially available PET thin film material with pure aluminum material deposited on its two surfaces is studied in this work to investigate the relationship between the mechanical behaviors and the structure of this “composite” material with the application of the concepts for the composite mechanics. This kind of structure has excellent anti-corrosion properties and can act as the good functional barrier material. Experimental researches are further carried out here to study the mechanical performance under various loading conditions as well as the influence of loading rates over the structure’s failure behavior, and over its mechanical properties like the yielding strength and the elastic modulus.

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Petcrie, S., A. Rengsomboon, W. Samit, N. Moonrin, R. Sirichaivetkul e J. Kajornchaiyakul. "E-23 IMPLICATION OF STANDARD TENSION TEST ON MECHANICAL PROPERTIES OF ALUMINUM CASTING(Session: Mechanical Behavior)". Proceedings of the Asian Symposium on Materials and Processing 2006 (2006): 115. http://dx.doi.org/10.1299/jsmeasmp.2006.115.

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Faria, A. M., C. H. Silva e O. Bianchi. "INFLUÊNCIA DO ÉSTER DE PENTAERITRITOL NO COMPORTAMENTO MECÂNICO DO ABS". Revista SODEBRAS 17, n. 193 (gennaio 2022): 137–48. http://dx.doi.org/10.29367/issn.1809-3957.17.2022.193.137.

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Karumuri, Srikanth. "Mechanical Behaviour of Metal Matrix Composites - A Review". Journal of Advanced Research in Dynamical and Control Systems 12, SP7 (25 luglio 2020): 1042–49. http://dx.doi.org/10.5373/jardcs/v12sp7/20202201.

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Giannopoulos, Georgios I. "Mechanical behavior of planar borophenes: A molecular mechanics study". Computational Materials Science 129 (marzo 2017): 304–10. http://dx.doi.org/10.1016/j.commatsci.2016.12.045.

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Kim, Hyun-Woo, e Eun-Ha Song. "Behavior Detection Mechanism for Trust Sensor Data Using Deep Learning in the Internet of Things". Webology 19, n. 1 (20 gennaio 2022): 4546–54. http://dx.doi.org/10.14704/web/v19i1/web19301.

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In this paper, we propose BDM-TSD(Behavior Detection Mechanism for Trust Sensing Data) to classify risk group and non-risk group for reliable sensor data identification in IoT environment with sensing function. BDM-TSD collects trust data such as sensing time, operation cycle, and type of sensing data of sensor devices connected to the IoT environment and artificial malicious data. The collected data performs network packet analysis and sensing data behavior analysis through the behavior of the sensor device that is subsequently operated through deep learning. Previously, research was conducted to detect unauthorized system calls of each device through security agents or abnormal behaviors through monitoring servers, and research to detect new and variant malicious behaviors with advanced attack techniques in IoT environments is insufficient A trusted IoT configuration is possible through malicious packet filtering and multi-sensor behavior detection. In this paper, we show how deep learning can be used to detect anomalies and malicious behaviors in the IoT environment based on the sensing function of multiple sensors.

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Rech, Joël, Christophe Claudin, Patrick Polly e Cédric Courbon. "New aspects of metrology of frictional behaviour in metal cutting". Mechanik, n. 11 (novembre 2016): 1751–53. http://dx.doi.org/10.17814/mechanik.2016.11.520.

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Shim, Jee Soo, Gi Hun Lee, Cheng Yu Cui e Hyeon Gyu Beom. "Mechanical Behaviors of Si/CNT Core/Shell Nanocomposites under Tension: A Molecular Dynamics Analysis". Nanomaterials 11, n. 8 (2 agosto 2021): 1989. http://dx.doi.org/10.3390/nano11081989.

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The silicon/carbon nanotube (core/shell) nanocomposite electrode model is one of the most promising solutions to the problem of electrode pulverization in lithium-ion batteries. The purpose of this study is to analyze the mechanical behaviors of silicon/carbon nanotube nanocomposites via molecular dynamics computations. Fracture behaviors of the silicon/carbon nanotube nanocomposites subjected to tension were compared with those of pure silicon nanowires. Effective Young’s modulus values of the silicon/carbon nanotube nanocomposites were obtained from the stress and strain responses and compared with the asymptotic solution of continuum mechanics. The size effect on the failure behaviors of the silicon/carbon nanotube nanocomposites with a fixed longitudinal aspect ratio was further explored, where the carbon nanotube shell was found to influence the brittle-to-ductile transition behavior of silicon nanowires. We show that the mechanical reliability of brittle silicon nanowires can be significantly improved by encapsulating them with carbon nanotubes because the carbon nanotube shell demonstrates high load-bearing capacity under tension.

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Zhang, Siyuan, Dawei Li e Yanwei Liu. "Friction Behavior of Rough Surfaces on the Basis of Contact Mechanics: A Review and Prospects". Micromachines 13, n. 11 (4 novembre 2022): 1907. http://dx.doi.org/10.3390/mi13111907.

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Contact and friction are closely related as friction cannot happen without contact. They are widely used in mechanical engineering, traffic, and other fields. The real contact surface is not completely smooth, but it is made up of a series of tiny contact asperities as viewed in the micro-scale. This is just the complexity of the contact and friction behaviors of rough surfaces: the overall mechanical behavior is the result of all asperities which are involved during the contact. Due to the multiplicity of surface topography, the complexity of contact scale, and the nonlinearity of the constitutive material, there are still many open topics in the research of contact and friction behavior of rough surfaces. Based on the perspective of the macroscopic and micro-nano scale contact mechanics, this review gives a brief overview of friction for the latest developments and points out the existing issues and opportunities for future studies.

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Kim, Yeon-Wook, Tae-Hyun Nam e Seong-Min Lee. "Martensitic Transformation Behaviors of Compositionally Graded Ti–Ni-Based Shape Memory Alloys". Science of Advanced Materials 12, n. 10 (1 ottobre 2020): 1586–90. http://dx.doi.org/10.1166/sam.2020.3802.

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In this study, we demonstrate a simple and effective way to fabricate functionally graded TiNi-based alloys with linear variations of composition and martensitic transformation behavior. Ti50Ni50 and Ti50Ni35Cu15 alloy strips were fabricated through a melt overflow process. The compositionally graded diffusion couple was fabricated by annealing two strips of different alloy compositions after being placed face to face in a pressing graphite mold. The mechanical properties and martensitic transformation behaviour of the diffusion couple were analysed by tensile test and DSC. The compositionally graded specimens exhibited unique superelastic property and wide martensitic formation temperature range. Such mechanical and thermal behaviors of the compositionally graded TiNi-based alloy offer good function and controllability for actuators.

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Tabourot, Laurent, Pascale Balland, Jonathan Raujol-Veillé, Mathieu Vautrot, Christophe Déprés e Franck Toussaint. "Compartmentalized Model for the Mechanical Behavior of Titanium". Key Engineering Materials 504-506 (febbraio 2012): 673–78. http://dx.doi.org/10.4028/www.scientific.net/kem.504-506.673.

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As close as you watch them, the materials (especially metals) present discontinuities that can easily be qualified as strong. Dislocations, structures formed by these dislocations, phases and grains are all discontinuities, also sources of heterogeneity, with effects on material behavior that are not really well reproduced by a model based on a continuity assessment. Consequently, the materials should be considered as a set of compartments with different behaviors. This promotes an alternative way to define models. A coherent modeling process is probably the integration of the different behaviors of the material compartments within the global model. The objective is here to build an efficient elasto(visco)plastic model of the mechanical behavior of titanium combining compartmentalized behaviors. After setting the frame of the study, which is of primary importance, the proposed modeling process is running as follows (i) choose a local behavior, (ii) identify the parameters of crystalline texture that must be integrated into the simulation and (iii) finally formulate a way of combining local compartments behaviors. The intrinsic properties of Finite Element codes are used to achieve the integration of the whole system.

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Hobson, Chad M., e Andrew D. Stephens. "Modeling of Cell Nuclear Mechanics: Classes, Components, and Applications". Cells 9, n. 7 (6 luglio 2020): 1623. http://dx.doi.org/10.3390/cells9071623.

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Cell nuclei are paramount for both cellular function and mechanical stability. These two roles of nuclei are intertwined as altered mechanical properties of nuclei are associated with altered cell behavior and disease. To further understand the mechanical properties of cell nuclei and guide future experiments, many investigators have turned to mechanical modeling. Here, we provide a comprehensive review of mechanical modeling of cell nuclei with an emphasis on the role of the nuclear lamina in hopes of spurring future growth of this field. The goal of this review is to provide an introduction to mechanical modeling techniques, highlight current applications to nuclear mechanics, and give insight into future directions of mechanical modeling. There are three main classes of mechanical models—schematic, continuum mechanics, and molecular dynamics—which provide unique advantages and limitations. Current experimental understanding of the roles of the cytoskeleton, the nuclear lamina, and the chromatin in nuclear mechanics provide the basis for how each component is subsequently treated in mechanical models. Modeling allows us to interpret assay-specific experimental results for key parameters and quantitatively predict emergent behaviors. This is specifically powerful when emergent phenomena, such as lamin-based strain stiffening, can be deduced from complimentary experimental techniques. Modeling differences in force application, geometry, or composition can additionally clarify seemingly conflicting experimental results. Using these approaches, mechanical models have informed our understanding of relevant biological processes such as migration, nuclear blebbing, nuclear rupture, and cell spreading and detachment. There remain many aspects of nuclear mechanics for which additional mechanical modeling could provide immediate insight. Although mechanical modeling of cell nuclei has been employed for over a decade, there are still relatively few models for any given biological phenomenon. This implies that an influx of research into this realm of the field has the potential to dramatically shape both future experiments and our current understanding of nuclear mechanics, function, and disease.

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Riad, Beshoy, e Xiong Zhang. "Modified State Surface Approach to Study Unsaturated Soil Hysteresis Behavior". Transportation Research Record: Journal of the Transportation Research Board 2674, n. 10 (21 luglio 2020): 484–98. http://dx.doi.org/10.1177/0361198120937014.

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Unsaturated soils are often used as a construction material in transportation infrastructures. In this situation, unsaturated soils are subjected to cyclic mechanical loading from traffic loads or wetting-drying cycles in seasonal climatic conditions. While mechanical hysteresis is a common feature of soils in general, hydraulic hysteresis is associated with unsaturated soils. Although several constitutive models for unsaturated soils have been proposed, the mechanical and hydraulic hysteresis behavior of unsaturated soils has been little studied. A modified state surface approach (MSSA) was first proposed for investigating the mechanical behavior of unsaturated soils. It was then extended to study the coupled hydro-mechanical behavior of unsaturated soils with a special focus on the consistency between different soil phases. However, hydraulic and mechanical hysteresis were neglected in MSSA formulations. In this paper, based on evidence from experimental results, the MSSA is extended further to study the coupled hydro-mechanical hysteresis behavior of unsaturated soils. The extended MSSA can reproduce several forms of mechanical and hydraulic behavior observed in experimental results that cannot be represented by existing constitutive models. To demonstrate the capabilities of the extended MSSA, typical behaviors are simulated and compared, qualitatively, with the characteristic trends of the behavior of unsaturated soils. Experimental results from the literature are then used to evaluate the model to predict, quantitatively, the observed behaviors. The agreement between measured and predicted results is considered satisfactory and confirms the possibility of the proposed approach to reproduce the hysteresis behavior of unsaturated soils.

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Jia, Shan Po, e Wei Zhong Chen. "Study on Excavation-Induced Permeability Changes in Clay Stone". Advanced Materials Research 243-249 (maggio 2011): 2548–51. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.2548.

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The mechanical and hydraulic behavior of clay in the excavation damaged zone (EDZ) around underground repository is relevant for the assessment of the safety of geotechnical barriers. By integrating Mohr-Coulomb criterion and damage mechanics considerations, an elasto-plastic damage model is established for clay stone. Based on laboratory and in site investigations, the hydro-mechanical coupled damage model and permeability healing model is developed by the fully coupled hydro-mechanical coupled model, which can predict permeability changes and fractures self-healing in EDZ. Considering the construction of connecting gallery of radioactive waste disposal in deep clay formation in Belgium, a finite element damage model for simulating shield tunneling is proposed. The variations of damage and permeability around the tunnel with time are analyzed in detail. The proposed model is able to effectively depict the main features of hydro-mechanical behaviors of Boom clay.

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Giannopoulos, Georgios I., e Stylianos K. Georgantzinos. "Mechanical Characterization of Boron-Nitride Nanoribbons via Nonlinear Structural Mechanics". Journal of Nano Research 40 (marzo 2016): 58–71. http://dx.doi.org/10.4028/www.scientific.net/jnanor.40.58.

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In the present paper, the tensile mechanical behavior of different sized, almost squared shaped, boron nitride nanoribbons is numerically investigated and predicted by using a structural mechanics approach based on the use of appropriate nonlinear potential functions concerning both two-body and three-body interatomic interactions appearing within their nanostructure. According to the proposed method, appropriate spring elements are combined in nanoscale in order to simulate the interatomic interactions appearing within boron-nitride nanostructure. The dimensions of boron-nitride nanoribbons as well as the shape of their edges, which may be armchair or zigzag, have influence on the overall behavior of the nanoribbons. Therefore, the study focuses on the prediction of tensile stress-strain behavior of boron-nitride nanoribbons of different sizes and edge shapes as well as on the estimation of significant corresponding material properties such as Young’s modulus, tensile strength, tensile failure strain and tensile toughness. The numerical results, which are compared with corresponding data given in the open literature where possible, demonstrate thoroughly the important influence of size and chirality of a narrow boron nitride monolayer on its mechanical behavior.

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He, Peng, Zhiqiang Fan, Xiangyu Yu e Zhansheng Liu. "Influence of the axial position of the external load on the mechanical behavior of the bolted lap joint with different materials". Mechanics & Industry 20, n. 6 (2019): 623. http://dx.doi.org/10.1051/meca/2019066.

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The axial mechanical behaviors of the bolted joint are a primary concern of the bolted joint structures. The axial load position has obvious influence on the axial mechanical behaviors of the bolted joint with different materials, while it can not be considered by the analytical method yet. The objective of this work is to fill this gap. With the pressure cone assumption, the axial resilience of the stress zones is derived, and the detailed formulation of the load introduction factor is proposed. The mechanical behavior of the bolted joint subjected to external axial load is formulated and compared with finite element analysis. Results show that the distance between load planes has apparent influence on the axial mechanical behaviors of the bolted joint. In particular for the bolted joint with different materials, the axial positions of the external load have obvious effect on the mechanical behavior. Comparisons with the finite element results indicate that with the proposed formulation of load introduction factor, the analytical formulations could predict the mechanical behavior of the bolted joint with different materials accurately. The proposed formulation of load introduction factor in this work could be an effective supplement of the heavy duty bolt design guideline.

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Harp, S. R., e R. F. Salant. "Analysis of Mechanical Seal Behavior During Transient Operation". Journal of Tribology 120, n. 2 (1 aprile 1998): 191–97. http://dx.doi.org/10.1115/1.2834409.

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A mathematical model that predicts the transient behavior of gas or liquid lubricated hydrostatic mechanical seals has been developed. The analysis includes an evaluation of the fluid, contact, and deformation mechanics of a mechanical seal subject to constant or varying rotational speed and sealed pressure. Squeeze film effects are included. For gas seals, slip at the walls is also taken into account. Results include predictions of film thickness distributions, contact forces, leakage rates, pressure distributions, heat generation rates, thermal deformation, and mechanical deformation.

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Jaouadi, Nour, Mohamed Jaziri, Abderrahim Maazouz e Khalid Lamnawar. "Biosourced Multiphase Systems Based on Poly(Lactic Acid) and Polyamide 11 from Blends to Multi-Micro/Nanolayer Polymers Fabricated with Forced-Assembly Multilayer Coextrusion". International Journal of Molecular Sciences 24, n. 23 (24 novembre 2023): 16737. http://dx.doi.org/10.3390/ijms242316737.

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The objective of the present study was to investigate multiphase systems based on polylactic acid (PLA) and polyamide 11 (PA11) from blends to multilayers. Firstly, PLA/PA11 blends compatibilized with a multifunctionalized epoxide, Joncryl, were obtained through reactive extrusion, and the thermal, morphological, rheological, and mechanical behaviors of these materials were investigated. The role of Joncryl as a compatibilizer for the PLA/PA11 system was demonstrated by the significant decrease in particle size and interfacial tension as well as by the tensile properties exhibiting a ductile behavior. Based on these findings, we were able to further clarify the effects of interdiffusion and diffuse interphase formation on the structure, rheology, and mechanics of compatible multilayered systems fabricated with forced-assembly multilayer coextrusion. The results presented herein aim to provide a deeper understanding of the interfacial properties, including the rheological, mechanical, and morphological behaviors, towards the control of the interface and confinement in multilayer polymers resulting from coextrusion, and also to permit their use in advanced applications.

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Ragueneau, Frédéric, Arnaud Delaplace e Luc Davenne. "Mechanical behaviour related to continuum damage mechanics for concrete". Revue Française de Génie Civil 7, n. 5 (maggio 2003): 635–45. http://dx.doi.org/10.1080/12795119.2003.9692514.

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Lv, Xiaoyong, Zhiwu Yu, Zhi Shan e Ju Yuan. "A Stochastic Damage Model for Bond Stress-Slip Relationship of Rebar-Concrete Interface under Monotonic Loading". Materials 12, n. 19 (26 settembre 2019): 3151. http://dx.doi.org/10.3390/ma12193151.

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The stochastic bond stress-slip behavior is an essential topic for the rebar-concrete interface. However, few theoretical models incorporating stochastic behavior in current literature can be traced. In this paper, a stochastic damage model based on micro-mechanical approach for bond stress-slip relationship of the interface under monotonic loading was proposed. In order to describe the mechanical behaviors of the rebar-concrete interface, a microscopic damage model was proposed. By introducing a micro-element consists of parallel spring element, friction element and a switch element, the model is formulated. In order to reflect the randomness of the bond stress-slip behavior contributed by the micro-fracture in the interface, a series of paralleled micro-elements are adopted with the failure threshold of individual spring element is set as a random variable. The expression of both mean and variance for the bond stress-slip relationship was derived based on statistical damage mechanics. Furthermore, by utilizing a search heuristic global optimization algorithm (i.e., a genetic algorithm), parameters of the proposed model are able to be identified from experimental results, which a lognormal distribution has adopted. The prediction was verified against experimental results, and it reveals that the proposed model is capable of capturing the random nature of the micro-structure and characterizing the stochastic behavior.

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Trương, Quốc Bảo, Anh Tuấn Vũ e Hoàng Kiên Phạm. "Nghiên cứu thực nghiệm và mô phỏng số ứng xử cơ học của xốp siêu nhẹ EPS". Vietnam Institute for Building Science and Technology 2023, vi.vol3 (ottobre 2023): 48–55. http://dx.doi.org/10.59382/j-ibst.2023.vi.vol3-7.

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EPS (Expanded Polystyrene) geofoam is the generic name for any cellular material used in geotechnical applications for over 40 years, in order to reduce the settlement of the ground. The material of EPS is polystyrene resin, produced by polymerizing styrene monomer which is created by oil refining, with a density of 12-35kg/m3, whose weight is only 1% ~ 2% compared with rock or concrete with the same volume but can withstand relatively large compressive stresses. In this study, the uniaxial compression and direct shear tests were carried out to investigate the mechanical behavior of EPS geofoam. After that, the numerical simulation of the uniaxial tests was conducted to select an appropriate material model as well as the corresponding parameters to simulate the mechanical behaviour of geofoam. From the numerical simulation results, it is seen that the Hardening Soil (HS) model and Mohr – Coulomb (MC) model can be used to simulate the mechanical behaviour of EPS geofoam.

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Trương, Quốc Bảo, Anh Tuấn Vũ e Hoàng Kiên Phạm. "Nghiên cứu thực nghiệm và mô phỏng số ứng xử cơ học của xốp siêu nhẹ EPS". Vietnam Institute for Building Science and Technology 2023, vi.vol3 (ottobre 2023): 48–55. http://dx.doi.org/10.59382/j-ibst.2023.vi.vol3-9.

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Abstract (sommario):

EPS (Expanded Polystyrene) geofoam is the generic name for any cellular material used in geotechnical applications for over 40 years, in order to reduce the settlement of the ground. The material of EPS is polystyrene resin, produced by polymerizing styrene monomer which is created by oil refining, with a density of 12-35kg/m3, whose weight is only 1% ~ 2% compared with rock or concrete with the same volume but can withstand relatively large compressive stresses. In this study, the uniaxial compression and direct shear tests were carried out to investigate the mechanical behavior of EPS geofoam. After that, the numerical simulation of the uniaxial tests was conducted to select an appropriate material model as well as the corresponding parameters to simulate the mechanical behaviour of geofoam. From the numerical simulation results, it is seen that the Hardening Soil (HS) model and Mohr – Coulomb (MC) model can be used to simulate the mechanical behaviour of EPS geofoam.

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Gunjal, Swati, e V. S. Jadhav V.S.Jadhav. "Mechanical Behavior of A Orthodontic Retraction Loop : A Analytical And Experimental Study". Indian Journal of Applied Research 1, n. 10 (1 ottobre 2011): 67–69. http://dx.doi.org/10.15373/2249555x/jul2012/23.

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Kinoshita, Hiroyuki, Koichi Kaizu, Hitoo Tokunaga e Kiyohiko Ikeda. "E-20 DISTORTION AND JOINT STRENGTH OF RIVETED PLATES(Session: Mechanical Behavior)". Proceedings of the Asian Symposium on Materials and Processing 2006 (2006): 112. http://dx.doi.org/10.1299/jsmeasmp.2006.112.

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Bidhendi, Amir J., Hongbo Li e Anja Geitmann. "Modeling the nonlinear elastic behavior of plant epidermis". Botany 98, n. 1 (gennaio 2020): 49–64. http://dx.doi.org/10.1139/cjb-2019-0058.

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Cell growth and organ development in plants are often correlated with the tensile behavior of the primary cell wall. To understand the mechanical behavior of plant material, various mechanical testing techniques have been employed, such as tensile testing of excised tissue samples. The onion (Allium cepa L.) epidermis has emerged as a model system for plant tissue mechanics. In this study, we performed tensile tests on strips of adaxial onion epidermis. While the tissue appeared stiffer in the direction along the major growth axis compared with the transverse direction, the tensile strength of tissue was not significantly different between the two orientations, indicating a nontrivial link between the cell wall and tissue mechanical anisotropy. Importantly, we observed the stress–strain behavior of the onion epidermis under tension to be highly nonlinear. Several hyperelastic models were fitted to the test data to evaluate their capacity to describe the nonlinear deformation of onion epidermis. The Yeoh hyperelastic model could successfully simulate the uniaxial tensile test data. This study suggests that accounting for nonlinearity in the deformation of the primary tissue may be essential for the accurate interpretation of mechanical test data, and a better understanding of the mechanics of the primary plant cell wall.

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Mollaeian, Keyvan, Yi Liu, Siyu Bi, Yifei Wang, Juan Ren e Meng Lu. "Nonlinear Cellular Mechanical Behavior Adaptation to Substrate Mechanics Identified by Atomic Force Microscope". International Journal of Molecular Sciences 19, n. 11 (4 novembre 2018): 3461. http://dx.doi.org/10.3390/ijms19113461.

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Cell–substrate interaction plays an important role in intracellular behavior and function. Adherent cell mechanics is directly regulated by the substrate mechanics. However, previous studies on the effect of substrate mechanics only focused on the stiffness relation between the substrate and the cells, and how the substrate stiffness affects the time-scale and length-scale of the cell mechanics has not yet been studied. The absence of this information directly limits the in-depth understanding of the cellular mechanotransduction process. In this study, the effect of substrate mechanics on the nonlinear biomechanical behavior of living cells was investigated using indentation-based atomic force microscopy. The mechanical properties and their nonlinearities of the cells cultured on four substrates with distinct mechanical properties were thoroughly investigated. Furthermore, the actin filament (F-actin) cytoskeleton of the cells was fluorescently stained to investigate the adaptation of F-actin cytoskeleton structure to the substrate mechanics. It was found that living cells sense and adapt to substrate mechanics: the cellular Young’s modulus, shear modulus, apparent viscosity, and their nonlinearities (mechanical property vs. measurement depth relation) were adapted to the substrates’ nonlinear mechanics. Moreover, the positive correlation between the cellular poroelasticity and the indentation remained the same regardless of the substrate stiffness nonlinearity, but was indeed more pronounced for the cells seeded on the softer substrates. Comparison of the F-actin cytoskeleton morphology confirmed that the substrate affects the cell mechanics by regulating the intracellular structure.

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Watan, Anaam W., Intehaa A. Mohammed, Hayat K. Hameed, Kareem A. Jasim e Auday H. Shaban. "Thermal and Mechanical Behaviour of Heat-resistant Clay-silica Composites". NeuroQuantology 20, n. 3 (26 marzo 2022): 43–46. http://dx.doi.org/10.14704/nq.2022.20.3.nq22038.

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The ceramic composite with different proportions of clay and silica was prepared with a grain size of 70 μm and the weight percentage was selected for four groups (clayx silica100-x) were x q15, 25, 30 and 50. In this manuscript, for each pressured sample, a sintering procedure was carried out for 3 hours under static air and at various sintering temperatures (1000, 1100, 1200, 1400)°C. After sintering, the density, porosity, water absorption, compression strength and thermal conductivity were measured. The best results were obtained using a mixture of 15% clay and 85% silica which were sintering at 1400°C for three hours under air.

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Velev, Valentin. "THERMO - MECHANICAL MODIFICATION OF AMORPHOUS POLYESTER FIBRES: I. DEFORMATION BEHAVIOUR". Journal scientific and applied research 4, n. 1 (10 ottobre 2013): 223–28. http://dx.doi.org/10.46687/jsar.v4i1.101.

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The deformation behaviour of as-spun amorphous poly (ethylene terephthalate) (PET) yarns subjected to simultaneous thermal and mechanical treatments has been studied. The samples heat mechanical treatments were realized using constructed and produced in the author’s laboratory device. Thermal deformation experiments were carried out on conditions of linear samples heating from room temperature up to 200 0C while they were subjected to a well-defined constant tensile force. It was observed very interesting and seemingly strange dependence of the final fibre length from the values of the applied tensile stress. The results obtained show the role of the strain stress on the causing samples deformation and in the control of the rival processes of the fluid like deformation and stress-induced crystallization.

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KIRAD, Abdelkader, Bassam Gamal Nasser MUTHANNA, Fateh MADANI e Loukmane ZEDDAM. "Numerical Study of the Mechanical Behavior of a Composite Material Plate". Eurasia Proceedings of Science Technology Engineering and Mathematics 26 (30 dicembre 2023): 458–61. http://dx.doi.org/10.55549/epstem.1411062.

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Composite materials are playing an increasingly significant role in the field of mechanics, such as aeronautics, aerospace, ships, and modern cars. The objective of this work was to investigate the mechanical properties and behavior of a composite plate (carbon/epoxy) through various tests, including tension, compression, and bending, using numerical analysis. Additionally, static analysis of mechanical behavior was performed, as well as the natural vibration of undamped structures. This analysis aimed to determine stresses, displacements, natural frequencies, and modes of free vibration. The obtained results illustrated that the composite material has a significant impact on improving the quality of mechanical properties and increasing the lifetime of materials, making it a valuable option for design and repair techniques. Furthermore, the results obtained in this work align well with previous literature studies. By examining these parameters, this study aimed to enhance our understanding of how composite materials perform under different mechanical loads and dynamic conditions, thus contributing valuable data to advance the field of composite mechanics.

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Suleymanova, Parvin. "SCIENTIFIC BASES OF THE DYNAMICS OF MACHINES AS A SECTION OF APPLIED MECHANICS". Global Sustainable Development 1, n. 1 (27 dicembre 2023): 33–38. http://dx.doi.org/10.69471/gsd-5.

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This article aims to synthesize the existing knowledge in the literature by examining the scientific foundations of machine dynamics, an important branch of applied mechanics. Machine dynamics is a field that focuses on the analysis of moving systems and understanding the behavior of these systems over time. In this article, the concepts of machine dynamics, its history and its relationship with applied mechanics are discussed through a literature review, and its scientific foundations in the field of mechanical engineering are discussed. The article provides a synthesis on the understanding of the dynamic behavior of mechanical systems and the role of this knowledge in applied mechanics projects.

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Byakova, O. V., A. O. Vlasov, M. V. Semenov, O. V. Zatsarna e S. V. Gnyloskurenko. "Mechanical Behaviour of the Porous and Foam Aluminium in Conditions of Compression: Determination of Key Mechanical Characteristics". METALLOFIZIKA I NOVEISHIE TEKHNOLOGII 39, n. 10 (29 dicembre 2017): 1363–75. http://dx.doi.org/10.15407/mfint.39.10.1363.

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Haeri, S. Mohsen. "Hydro-mechanical behavior of collapsible soils in unsaturated soil mechanics context". Japanese Geotechnical Society Special Publication 2, n. 1 (2016): 25–40. http://dx.doi.org/10.3208/jgssp.kl-3.

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QIAO, Jisen. "Method in testing of mechanics performance of materials local mechanical behavior". Chinese Journal of Mechanical Engineering 43, n. 12 (2007): 190. http://dx.doi.org/10.3901/jme.2007.12.190.

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40

Drosopoulos, Georgios A., Nikolaos Kaminakis, Nikoletta Papadogianni e Georgios E. Stavroulakis. "Mechanical Behaviour of Auxetic Microstructures Using Contact Mechanics and Elastoplasticity". Key Engineering Materials 681 (febbraio 2016): 100–116. http://dx.doi.org/10.4028/www.scientific.net/kem.681.100.

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The design of novel mechanical microstructures having auxetic behaviour is proposed in this paper using techniques of topology optimization for compliant mechanisms. The resulting microstructure can be modified in order to cover additional needs, not included in the topology optimization formulation. Classical structural optimization, contact mechanics, homogenization and nonlinear finite element analysis are used for this step. Thus, the modified microstructure or composite is studied with numerical homogenization in order to verify that it still has the wished auxetic behaviour. Finally, nonlinear finite element analysis shows how the auxetic behaviour is influenced by unilateral contact between the constituent materials, large displacements and elastoplasticity.

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Kim, Hyang Sook, Chung Eun Lee e Yong Sook Yang. "Factors associated with caring behaviors of family caregivers for patients receiving home mechanical ventilation with tracheostomy: A cross-sectional study". PLOS ONE 16, n. 7 (21 luglio 2021): e0254987. http://dx.doi.org/10.1371/journal.pone.0254987.

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Background The number of patients on home mechanical ventilation (HMV) worldwide has been steadily rising as medical technological advanced. To ensure the safety and quality care of the patients receiving HMV with tracheostomy, caring behavior of family caregivers is critical. However, studies on caring behavior of family caregivers and its associated factors were remained unexplored. This study aimed to describe the caring behaviors of family caregivers for patients receiving home mechanical ventilation with tracheostomy and to identify factors associated with their caring behaviors. Methods This was a cross-sectional study for 95 family caregivers for patients with invasive home mechanical ventilation in South Korea. Caring behaviors were assessed by the Caring Behavior Scale with 74 items with 5-point Likert scale. Data were analyzed using multiple regression analysis. Results Caring behaviors score of caregivers was 304.68±31.05 out of 370. They were significantly associated with knowledge on emergency care (β = 0.22, p = .011), number of required instruments for care (β = 0.21, p = .010), frequency of home visit care (β = 0.19, p = .017), experience of emergency situation for the last six months (β = 0.19, p = .009) and activities of daily living of patient (β = 0.27, p = .002). Conclusion Development of standardized multidisciplinary discharge education for improving the caring capacity of caregivers is required for successful and healthy application of home mechanical ventilation.

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Lahey, T. J., e G. R. Heppler. "Mechanical Modeling of Fabrics in Bending". Journal of Applied Mechanics 71, n. 1 (1 gennaio 2004): 32–40. http://dx.doi.org/10.1115/1.1629757.

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A fabric bending model that includes contributions from nonlinear elasticity, and viscous and Coulomb friction with hysteretic effects is presented. The model allows the recovery of the loading, unloading and hysteresis behaviors observed in the Kawabata evaluation system (KES) bending tests and provides the ability to simulate a continuum of property curves and to extrapolate to loading conditions not covered in the KES regimen. Model results are compared to experimental results. It is found that hysteretic behavior is observed due to friction between the yarns, and that nonlinear elastic behavior arises from jamming of the yarns and their subsequent compression.

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Wang, Peng, Jiawei Han, Siyuan Wang e Yu Guo. "Mechanical Behavior of Flexible Fiber Assemblies: Review and Future Perspectives". Materials 17, n. 24 (10 dicembre 2024): 6042. https://doi.org/10.3390/ma17246042.

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Flexible fibers, such as biomass particles and glass fibers, are critical raw materials in the energy and composites industries. Assemblies of the fibers show strong interlocking, non-Newtonian and compressible flows, intermittent avalanches, and high energy dissipation rates due to their elongation and flexibility. Conventional mechanical theories developed for regular granular materials, such as dry sands and pharmaceutical powders, are often unsuitable for modeling flexible fibers, which exhibit more complex mechanical behaviors. This article provides a comprehensive review of the current state of research on the mechanics of flexible fiber assemblies, focusing on their behavior under compression, shear flow, and gas–fiber two-phase flow processes. Finally, the paper discusses open issues and future directions, highlighting the need for advancements in granular theories to better accommodate the unique characteristics of flexible fibers, and suggesting potential strategies for improving their handling in industrial applications.

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Zhou, Bo, Zhen Qing Wang, Sung Ho Yoon e Guang Ping Zou. "Mechanical Behaviors of Torsion Actuator of Shape Memory Alloy". Key Engineering Materials 385-387 (luglio 2008): 213–16. http://dx.doi.org/10.4028/www.scientific.net/kem.385-387.213.

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A shape memory alloy (SMA) torsion actuator is designed by using SMA wires and a thin-walled tube. A mechanical model, which predicts the thermo-mechanical behaviors of the SMA torsion actuator, is developed based on the knowledge of solid mechanics and constitutive relation of SMA. The relationship of the torsion-angle and temperature of the SMA torsion actuator is numerically described by using the mechanical model coupled with Tanaka’s, Liang’s and Zhou’s phase transformation models of SMA respectively. Results show the mechanical model well predict the thermo-mechanical behaviors of the SMA torsion actuator.

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Sikoń, M. "Physical interpretation of the Cosserat mechanics for a collection of atoms". Bulletin of the Polish Academy of Sciences Technical Sciences 64, n. 2 (1 giugno 2016): 333–38. http://dx.doi.org/10.1515/bpasts-2016-0038.

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Abstract In this work, the Cosserat medium is analyzes as a set of atoms. These atoms are under the action of a mechanical load. The statistical analysis is preceded by a description of a single atom using classical mechanics and quantum mechanics. The behavior of the atoms in the field generated by mechanical change of the interatomic distance is shown as a phenomenon which can explain the Cosserat mechanics in a continuum.

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RIBEIRO, G. O., P. C. GUETTI e P. SERNA. "Experimental study of the mechanical behavior of self-compacting concrete based on fracture mechanics". Revista IBRACON de Estruturas e Materiais 10, n. 3 (giugno 2017): 744–59. http://dx.doi.org/10.1590/s1983-41952017000300010.

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ABSTRACT Considering the physical nonlinearity of concrete and the fundamentals of fracture mechanics for quasi-brittle materials, the objective of this study was to determine the fracture energy and the length of the fracture process zone (FPZ) as well as the modulus of elasticity, the tensile strength and the compressive strength of self-compacting concrete (SCC) to characterize its mechanical behavior. A series of tests, including a three-point bending test of SCC and conventional vibrated concrete (CVC) specimens, with a notch at mid-span, and tensile and compressive tests were performed. The mechanical parameters obtained from the CVC specimens were considered as a comparative reference. The effect of the following variables was evaluated and considered at two levels: compressive strength (30 and 50 MPa), granular composition (fine and coarse particle size) and maximum diameter of the aggregate (12 and 20 mm). The effect of these variables on the mechanical behaviors of the SCC specimens was evaluated based on the test results of specimens of four types of concrete, which were obtained from the combination of the variables. The bending tests were performed according to the RILEM TC 89-FMT recommendations, which are based on the size-effect method.

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Dai, L. H., e Y. L. Bai. "Basic mechanical behaviors and mechanics of shear banding in BMGs". International Journal of Impact Engineering 35, n. 8 (agosto 2008): 704–16. http://dx.doi.org/10.1016/j.ijimpeng.2007.10.007.

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SHIOYA, T. "Macroscopic and Microscopic Scale Effects in Mechanical Behavior of Materials(OTANI MEMORIAL LECTURE)". Proceedings of the JSME Materials and Processing Conference (M&P) 2005 (2005): 1. http://dx.doi.org/10.1299/jsmeintmp.2005.1_1.

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49

P, Thagappillai, e Tamilarasan Tamilarasan. "Evaluation of Mechanical Behavior of Hybrid Aluminium Metal Matrix by Using Stir Casting". International Journal of Research Publication and Reviews 5, n. 1 (2 gennaio 2024): 321–24. http://dx.doi.org/10.55248/gengpi.5.0124.0112.

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Wang, Jun, Rahul Rai e Jason N. Armstrong. "Investigation of compressive deformation behaviors of cubic periodic cellular structural cubes through 3D printed parts and FE simulations". Rapid Prototyping Journal 26, n. 3 (17 novembre 2019): 459–72. http://dx.doi.org/10.1108/rpj-03-2019-0069.

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Purpose This paper aims to clarify the relationship between mechanical behaviors and the underlying geometry of periodic cellular structures. Particularly, the answer to the following research question is investigated: Can seemingly different geometries of the repeating unit cells of periodic cellular structure result in similar functional behaviors? The study aims to cluster the geometry-functional behavior relationship into different categories. Design/methodology/approach Specifically, the effects of the geometry on the compressive deformation (mechanical behavior) responses of multiple standardized cubic periodic cellular structures (CPCS) at macro scales are investigated through both physical tests and finite element simulations of three-dimensional (3D) printed samples. Additionally, these multiple CPCS can be further nested into the shell of 3D models of various mechanical domain parts to demonstrate the influence of their geometries in practical applications. Findings The paper provides insights into how different CPCS (geometrically different unit cells) influence their compressive deformation behaviors. It suggests a standardized strategy for comparing mechanical behaviors of different CPCS. Originality/value This paper is the first work in the research domain to investigate if seemingly different geometries of the underlying unit cell can result in similar mechanical behaviors. It also fulfills the need to infill and lattify real functional parts with geometrically complex unit cells. Existing work mainly focused on simple shapes such as basic trusses or cubes with spherical holes.

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