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Journal articles on the topic 'Elasticity features original'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

І.Г., Яловега, Сидоров М.В. та Гончаров Д.О. "МЕТОДОЛОГІЧНІ ОСНОВИ ДОСЛІДЖЕННЯ ЕЛАСТИЧНОСТІ ПОПИТУ ТА ПРОПОЗИЦІЇ". ЗБІРНИК НАУКОВИХ ПРАЦЬ ХАРКІВСЬКОГО НАЦІОНАЛЬНОГО ПЕДАГОГІЧНОГО УНІВЕРСИТЕТУ ІМЕНІ Г.С. СКОВОРОДИ "ЕКОНОМІКА", № 15 (18 липня 2015): 51–60. https://doi.org/10.5281/zenodo.20695.

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In the article the methodological features of the study of the concept of elasticity functions as an important direction of application of differential calculus in economics. Highlight features original concept, the central concept of differential calculus, which is important in the economy and is the foundation of basic economic concept of elasticity. The problem of matching process teaching of mathematical analysis for students of our university requirements and the present state of scientific development. On the basis of educational materials on mathematical analysis the failure of illustra

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Zhang, Peng, Guoqi Yu, Dongri Shan, Zhenxue Chen, and Xiaofang Wang. "Identifying the Strength Level of Objects’ Tactile Attributes Using a Multi-Scale Convolutional Neural Network." Sensors 22, no. 5 (2022): 1908. http://dx.doi.org/10.3390/s22051908.

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In order to solve the problem in which most currently existing research focuses on the binary tactile attributes of objects and ignores identifying the strength level of tactile attributes, this paper establishes a tactile data set of the strength level of objects’ elasticity and hardness attributes to make up for the lack of relevant data, and proposes a multi-scale convolutional neural network to identify the strength level of object attributes. The network recognizes the different attributes and identifies differences in the strength level of the same object attributes by fusing the origina

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Ohayon, Jacques, Philippe Tracqui, Redouane Fodil, et al. "Analysis of Nonlinear Responses of Adherent Epithelial Cells Probed by Magnetic Bead Twisting: A Finite Element Model Based on a Homogenization Approach." Journal of Biomechanical Engineering 126, no. 6 (2004): 685–98. http://dx.doi.org/10.1115/1.1824136.

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An original homogenization method was used to analyze the nonlinear elastic properties of epithelial cells probed by magnetic twisting cytometry. In this approach, the apparent rigidity of a cell with nonlinear mechanical properties is deduced from the mechanical response of the entire population of adherent cells. The proposed hyperelastic cell model successfully accounts for the variability in probe-cell geometrical features, and the influence of the cell–substrate adhesion. Spatially distributed local secant elastic moduli had amplitudes ranging from 10 to 400 Pa. The nonlinear elastic beha

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Oanta, Emil. "Original Computer Based Solutions in Structural Studies." Advanced Materials Research 837 (November 2013): 440–45. http://dx.doi.org/10.4028/www.scientific.net/amr.837.440.

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The paper is inspired by the computer based solutions developed over a period of almost 30 years. Thus, the original computer based solutions were developed for a wide range of problems: computer aided geometry for domain definition, data generators for finite element applications, output data file processors with visualization facilities, matrices defined as random access files with a wide range of subsequent applications in several disciplines and domains of science, FDM and FEM applications, customized solutions for heat transfer problems, computational fluid dynamics, experimental data red

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Меньшикова, С. Г., А. А. Шушков та В. В. Бражкин. "Микроструктура и физико-механические свойства бинарного сплава Al-=SUB=-90-=/SUB=-Gd-=SUB=-10-=/SUB=- после баротермической обработки". Физика твердого тела 64, № 8 (2022): 920. http://dx.doi.org/10.21883/ftt.2022.08.52683.361.

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Microindentation, X-ray phase analysis, optical and electron microscopy have been used to study the microstructure and bulk physical and mechanical properties (hardness, reduced modulus of elasticity, plasticity index, elastic recovery parameter) of two samples of the binary hypereutectic alloy Al90Gd10 (hereinafter at.%). The first sample was obtained by rapid cooling of the melt at a rate of 1000 deg/sec at a high pressure of 10 GPa, the hardening temperature was 1800 K. The second sample was obtained by pressing the original sample at a high pressure of 5 GPa without melting. Compared to th

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Ganjdanesh, Yousef, Keivan Maghooli, A. Motie Nasrabadi, and Mohammad-Shahram Moein. "A NEW METHOD FOR SIGNATURE VERIFICATION BASED ON PHYSIOLOGICAL CHARACTERISTICS OF HAND MUSCLES AND TENDONS." Biomedical Engineering: Applications, Basis and Communications 29, no. 01 (2017): 1750006. http://dx.doi.org/10.4015/s1016237217500065.

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Signature authentication with static and dynamic features of signature has been studied for decades, in this paper a novel and new method based on estimating elasticity and viscoelasticity characteristics of the muscles and tendons of index finger of the right hand was presented and the angles between the finger knuckles were collected by data collection glove and the location of digital pen tip on sensitive pad is stored in computer too. With NMC model and writing required mathematical equations and inverse modeling, physiological characteristics of muscles and tendons of right hand were esti

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Grytsenko, Oleksandr, Ludmila Dulebova, Oleh Suberlyak, Volodymyr Skorokhoda, Emil Spišák, and Ivan Gajdoš. "Features of Structure and Properties of pHEMA-gr-PVP Block Copolymers, Obtained in the Presence of Fe2+." Materials 13, no. 20 (2020): 4580. http://dx.doi.org/10.3390/ma13204580.

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This paper presents the research results of the copolymer structure and properties of 2-hydroxyethylmethacrylate (HEMA) with polyvinylpyrrolidone (PVP) and their hydrogels, obtained by block polymerization in the presence of iron sulfate (II). By the methods of chemical analysis, IR spectroscopy, Thermogravimetric (TG) and Differential Thermal Analysis (DTA), the course of grafted copolymerization of HEMA on PVP with the formation of a cross-linked copolymer was confirmed. The results received by scanning electron microscopy showed that due to the copolymerization of HEMA with PVP, macroporous

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Cyrek, Piotr. "Kluczowe cechy pracowników w rozwoju przedsiębiorstw handlowych." Zeszyty Naukowe SGGW - Ekonomika i Organizacja Gospodarki Żywnościowej, no. 113 (April 3, 2016): 105–16. http://dx.doi.org/10.22630/eiogz.2016.113.9.

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The main aim of the paper was to specify features of employees that are the key ones for retailers selling products in Podkarpackie region. To do this, the retailing entities were categorized in a way allowing to search for employees’ features resulting in better economic results. The enterprises were cathegorised according to the place of activity and number of employees, taking into consideration the potential employees that gain a special interest of managers were identified. Direct interviews were carried out, with the use of an original questionnaire form, in 300 retailing enterprises in

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Dumbser, Michael, and Eleuterio F. Toro. "On Universal Osher-Type Schemes for General Nonlinear Hyperbolic Conservation Laws." Communications in Computational Physics 10, no. 3 (2011): 635–71. http://dx.doi.org/10.4208/cicp.170610.021210a.

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This paper is concerned with a new version of the Osher-Solomon Riemann solver and is based on a numerical integration of the path-dependent dissipation matrix. The resulting scheme is much simpler than the original one and is applicable to general hyperbolic conservation laws, while retaining the attractive features of the original solver: the method is entropy-satisfying, differentiable and complete in the sense that it attributes a different numerical viscosity to each characteristic field, in particular to the intermediate ones, since the full eigenstructure of the underlying hyperbolic sy

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Cavalli, Alberto, Paola Mazzanti, Lorenzo Riparbelli, and Marco Togni. "Strengthening of Ancient Timber Beams during Restoration Operations: Effect of Wood Cutting on Modulus of Elasticity." Forests 14, no. 9 (2023): 1854. http://dx.doi.org/10.3390/f14091854.

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In ancient buildings, timber members may require specific on-site interventions, including reinforcement or repair and sometimes the insertion of reinforcing material into grooves routed in the original sound wood. The required number, positions, and dimensions of grooves and the strengthening materials may differ according to the desired increases in bending stiffness and strength. The modulus of elasticity (MOE) of each beam is of key importance: the MOE is typically a point of weakness for wood and is considered a constant characteristic of each beam. However, taking into account the wood l

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Artyushkov, E. L., А. A. Lyzikov, M. L. Kaplan, Y. Y. Doroshko, and B. B. Osipov. "Bacterial biofilm as a risk factor for infectious complications in the use of polypropylene endoprostheses in surgery of anterior wall hernias." Health and Ecology Issues 22, no. 1 (2025): 15–22. https://doi.org/10.51523/2708-6011.2025-22-1-02.

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Objective. To analyze data on synthetic prostheses used in herniology, features of the body’s reaction to their implantation, possible infectious complications, and to search for ways to solve identified problems.Materials and methods. An analysis of publications in the PubMed, Web of Science, Elibrary and CyberLeninka systems was carried out, describing the use of synthetic prostheses for hernioplasty and the nature of complications in the postoperative period. The following search terms were used: “synthetic prostheses”, “tension-free hernioplasty”, “bacterial biofilm”, “infectious complicat

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Bukhsh, Ayman, Rahaf Bargat, Mohammed Alkuhl, et al. "Rates, Patterns and Prevalence of Mandibular Fractures in Children." JOURNAL OF HEALTHCARE SCIENCES 02, no. 07 (2022): 130–33. http://dx.doi.org/10.52533/johs.2022.2701.

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Maxillofacial pediatric fractures are highly uncommon due to their unique characteristics of high elasticity, cartilaginous tissue, lack of pneumatization, evolutionary stages of dentition and other protective features. However, despite their rarity, pediatric facial fractures often seen by pediatric surgeons, plastic surgeons and in the emergency department. The mandible is the most commonly fractured pediatric facial bone. In this review, we will discuss the various patterns of mandibular fractures, their rates and prevalence in the pediatric population. An extensive search was conducted fro

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Yan, Rui, and Bo Yan. "Location model for a remanufacturing reverse logistics network based on adaptive genetic algorithm." SIMULATION 95, no. 11 (2019): 1069–84. http://dx.doi.org/10.1177/0037549718821162.

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Energy saving and environmental protection are important issues of today. Concerning the environmental and social need to increase the utilization of used products, this paper introduces two remanufacturing reverse logistics (RL) network models, namely, the open-loop model and the closed-loop model. In an open-loop RL system, used products are recovered by outside firms, while in a closed-loop RL system, they are returned to their original producers. The open-loop model features a location selection with two layers. For this model, a mixed-integer linear program (MILP) is built to minimize the

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Andreianov, Boris, Mostafa Bendahmane, Alfio Quarteroni, and Ricardo Ruiz-Baier. "Solvability analysis and numerical approximation of linearized cardiac electromechanics." Mathematical Models and Methods in Applied Sciences 25, no. 05 (2015): 959–93. http://dx.doi.org/10.1142/s0218202515500244.

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This paper is concerned with the mathematical analysis of a coupled elliptic–parabolic system modeling the interaction between the propagation of electric potential and subsequent deformation of the cardiac tissue. The problem consists in a reaction–diffusion system governing the dynamics of ionic quantities, intra- and extra-cellular potentials, and the linearized elasticity equations are adopted to describe the motion of an incompressible material. The coupling between muscle contraction, biochemical reactions and electric activity is introduced with a so-called active strain decomposition f

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Anisimov, Alexander, Maksim Suslov, Anna Petrova, Tatyana Chernova, Oleg Gorshkov, and Tatyana Gorshkova. "Using the Inverse Three-Point Bending Test to Determine Mechanical Properties of Plant Stems." Methods and Protocols 8, no. 2 (2025): 32. https://doi.org/10.3390/mps8020032.

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Biomechanical parameters of plant tissues and organs are increasingly recognized as key factors in plant development and application, increasing the demand for convenient devices for their study. The paper presents an original device for performing a three-point bending test using the inverse method, which is a modification of the classical (straight) three-point test. The designed device was tested in experiments to determine the modulus of elasticity of flax plant stems, and the results were compared with data obtained using the vibration method and the straight three-point bending test on a

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Godyń, Katarzyna, and Alena Kožušníková. "Microhardness of Coal from Near-Fault Zones in Coal Seams Threatened with Gas-Geodynamic Phenomena, Upper Silesian Coal Basin, Poland." Energies 12, no. 9 (2019): 1756. http://dx.doi.org/10.3390/en12091756.

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Near-fault coal displays some specific structural and textural features. As the distance to the fault diminishes, one can observe ever stronger, gradual degradation of coal, demonstrated by the emergence of structural distortions exogenic in their origin, visible under a microscope. The process of gradual degradation of coal—manifested by the appearance of structural distortions exogenic in their origin—takes place. This can be observed under a microscope. The measurements of the microhardness of structurally altered coal carried out using the Vickers hardness test. For the purpose of this res

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PALATNIK, RUSLANA R., FABIO EBOLI, ANDREA GHERMANDI, IDDO KAN, MICKEY RAPAPORT-ROM, and MORDECHAI SHECHTER. "INTEGRATION OF GENERAL AND PARTIAL EQUILIBRIUM AGRICULTURAL LAND-USE TRANSFORMATION FOR THE ANALYSIS OF CLIMATE CHANGE IN THE MEDITERRANEAN." Climate Change Economics 02, no. 04 (2011): 275–99. http://dx.doi.org/10.1142/s2010007811000310.

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This study presents an internal modification of a dynamic computable general equilibrium model, ICES, employing inputs from a partial equilibrium model for the agricultural sector, VALUE. The aim is to quantify and analyze the medium-term socio-economic consequences of projected climate change. The methodology is innovative as it combines state-of-the-art knowledge from economic and biophysical sources and is demonstrated in application to two Mediterrenean countries: Israel and Italy. The information from the VALUE model was incorporated into the ICES economic model to improve the agricultura

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Cao, Wenfang, Jun Wang, and Lina Wang. "The diagnostic and prognostic value of real-time ultrasound elastography combined with contrast-enhanced ultrasound parameters for cervical cancer." Pakistan Journal of Medical Sciences 41, no. 6 (2025): 1664–69. https://doi.org/10.12669/pjms.41.6.11974.

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Objective: This study aimed to explore the diagnostic and prognostic value of real-time tissue elastography (RTE) and contrast-enhanced ultrasound (CEUS) parameters in cervical cancer (CC). Methods: This retrospective study included RTE and CEUS records of 144 patients who underwent cervical ultrasound in Xi’an People’s Hospital from January 2022 to August 2023. Patients were grouped into the malignant group and the benign group based on the characteristics of the cervical lesions. The RTE and CEUS parameters were compared between the groups and between patients with different pathological fea

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Phillips, Michael, Giuseppe Tronci, Christopher M. Pask, and Stephen J. Russell. "Nonwoven Reinforced Photocurable Poly(glycerol sebacate)-Based Hydrogels." Polymers 16, no. 7 (2024): 869. http://dx.doi.org/10.3390/polym16070869.

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Implantable hydrogels should ideally possess mechanical properties matched to the surrounding tissues to enable adequate mechanical function while regeneration occurs. This can be challenging, especially when degradable systems with a high water content and hydrolysable chemical bonds are required in anatomical sites under constant mechanical stimulation, e.g., a foot ulcer cavity. In these circumstances, the design of hydrogel composites is a promising strategy for providing controlled structural features and macroscopic properties over time. To explore this strategy, the synthesis of a new p

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Souza-Júnior, Milton Secundino de, Nelson Souto Rosa, and Fernando Antônio Aires Lins. "An execution environment as a service for adaptive long-running workflows." International Journal of Web Information Systems 17, no. 2 (2021): 117–39. http://dx.doi.org/10.1108/ijwis-12-2020-0077.

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Purpose This paper aims to present Long4Cloud (long-running workflows execution environment for cloud), a distributed and adaptive LRW execution environment delivered “as a service” solution. Design/methodology/approach LRWs last for hours, days or even months and their duration open the possibility of changes in business rules, service interruptions or even alterations of formal regulations of the business before the workflow completion. These events can lead to problems such as loss of intermediary results or exhaustion of computational resources used to manage the workflow execution. Existi

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Walasik, Artur. "The Size of Tax Jurisdiction and Tax Density." Annales Universitatis Mariae Curie-Skłodowska, sectio H – Oeconomia 57, no. 4 (2023): 201–15. http://dx.doi.org/10.17951/h.2023.57.4.201-215.

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Theoretical background: Theory of public finance theory quite widely recognized that the purest indicator of government size is to observe the determinants and trend of level of public spending. It could be easy translates into the statement that following demand of government for money, first satisfied by taxes, enables to conclude, in particular, that the ratio of tax revenues to gross domestic product is the most appropriate indicator of the fiscal efficiency of the tax system. Purpose of the article: The very aim of paper is to determine, on the basis of constructed original taxation densi

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IKEDA, Kei. "Symposium 5." Journal of Clinical Rheumatology and Immunology 23, Supp01 (2023): 14. http://dx.doi.org/10.1142/s2661341723740140.

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While magnetic resonance imaging (MRI) is the most established imaging modality to assess autoimmune myositis (AIM), there is a need for less expensive and more accessible tools. To analyze whether there is sufficient data from published literature to demonstrate that ultrasound presents good metric properties (truth, discrimination and feasibility) in AIM, the OMERACT ultrasound group for myositis performed a systematic literature review. The inclusion criteria required original research involving adult humans, reported in English, assessing ultrasound and elastography in patients with an AIM

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Chaudhary, Indresh, Piyush Garg, V. Shankar, and Ganesh Subramanian. "Elasto-inertial wall mode instabilities in viscoelastic plane Poiseuille flow." Journal of Fluid Mechanics 881 (October 24, 2019): 119–63. http://dx.doi.org/10.1017/jfm.2019.759.

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A linear stability analysis of plane Poiseuille flow of an upper-convected Maxwell (UCM) fluid, bounded between rigid plates separated by a distance $2L$, has been carried out to investigate the interplay of elasticity and inertia on flow stability. The stability is governed by the following dimensionless groups: the Reynolds number $Re=\unicode[STIX]{x1D70C}U_{max}L/\unicode[STIX]{x1D702}$ and the elasticity number $E\equiv W/Re=\unicode[STIX]{x1D706}\unicode[STIX]{x1D702}/(\unicode[STIX]{x1D70C}L^{2})$, where $W=\unicode[STIX]{x1D706}U_{max}/L$ is the Weissenberg number. Here, $\unicode[STIX

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Liu, Xiaoqian. "Optimization of College Students’ Mental Health Education Based on Improved Intelligent Recognition Model." Mathematical Problems in Engineering 2022 (March 22, 2022): 1–11. http://dx.doi.org/10.1155/2022/1573810.

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Paying attention to the mental health education of college students, optimizing the psychological quality of college students, and improving their mental health level are inevitable requirements of higher education facing the world. In recent years, the mental health education of college students has always been a hot issue in the education circle, which has attracted much attention. It is the main research purpose of this paper to correctly understand the problems existing in college students’ mental health education and to find reasonable countermeasures and approaches to solve these problem

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Bagaiskov, Yu. "Modeling of Gear-Hone Teeth with Consideration of Elasticity, Correction, and Operational Wear." Key Engineering Materials 910 (February 15, 2022): 30–35. http://dx.doi.org/10.4028/p-01e1n2.

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Gear hones are used as tools for gear honing. The efficiency of using gear hones mainly depends on the parameters of their compound material, first of all on the wear resistance and elasticity modulus. In terms of the elasticity modulus, gear hones can be hard and elastic, depending on the bonding agent type. Experience shows that gear-hone teeth distort during gear honing; they feature contact and flexural deformation and wear during metal removal, including along the tooth space. For this reason, it is necessary to consider the deformation and wear values for designing of gear hone geometry.

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Si, Wei, and Qiang Xu. "Virtual Boundary Element Collocation Method with RBF Interpolation on Virtual Boundary and Diagonalization Feature in Fast Multipole Method." Advanced Materials Research 378-379 (October 2011): 166–70. http://dx.doi.org/10.4028/www.scientific.net/amr.378-379.166.

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The algorithm idea of virtual boundary element collocation method with RBF interpolation on virtual boundary and diagonalization feature in fast multipole method is presented to study 2-D elasticity problems in this paper. In other words, the new fast multipole method (FMM) adopting diagonalization and the generalized minimal residual (GMRES) algorithm are jointly employed to solve the equations related to virtual boundary element collocation method (VBEM) with RBF interpolation on virtual boundary. In this paper, the numerical scheme suitable for original FMM with respect to two-dimensional p

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Zhang, Jianming, Lei Han, Yudong Zhong, Yunqiao Dong, and Weicheng Lin. "Boundary element analysis for elasticity problems using expanding element interpolation method." Engineering Computations 37, no. 1 (2019): 1–20. http://dx.doi.org/10.1108/ec-11-2018-0506.

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Purpose This paper aims to propose a boundary element analysis of two-dimensional linear elasticity problems by a new expanding element interpolation method. Design/methodology/approach The expanding element is made up based on a traditional discontinuous element by adding virtual nodes along the perimeter of the element. The internal nodes of the original discontinuous element are referred to as source nodes and its shape function as raw shape function. The shape functions of the expanding element constructed on both source nodes and virtual nodes are referred as fine shape functions. Boundar

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Nie, Zhen, Yuanqi Li, and Yehua Wang. "Mechanical Properties of Steels for Cold-Formed Steel Structures at Elevated Temperatures." Advances in Civil Engineering 2020 (July 1, 2020): 1–18. http://dx.doi.org/10.1155/2020/9627357.

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It is highly important to clarify the high-temperature mechanical properties in the design of cold-formed steel (CFS) structures under fire conditions due to the unique deterioration feature in material properties under fire environment and associated reduction to the mechanical performance of members. This paper presents the mechanical properties of widely used steels for cold-formed steel structures at elevated temperatures. The coupons were extracted from original coils of proposed full annealed steels (S350 and S420, with nominal yielding strengths 280 MPa and 350 MPa) and proposed stress

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Stankovic, Milan, Natasa Janjic, Srdjan Ninkovic, Vladimir Harhaji, Dragan Savic, and Miroslav Milankov. "Joined statistical – thermodynamic expression for entropy and Hook’s law in the analysis of states of elongated ligament biostructure." Thermal Science 20, suppl. 2 (2016): 573–80. http://dx.doi.org/10.2298/tsci150925039s.

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Analytic joined statistical - thermodynamic expression for entropy as a function of state for measuring disorder of the corresponding micro state and the mechanical parameters which feature in Hooke?s law on elasticity as a measure of macro state was used in the situation of isothermal elongation of viscoelastic ligament biostructure simultaneously with external force of constant intensity to determine the change of entropy and the resultant reactive elastic force in the function of relative elongation. The sample used for the analysis and testing of the original joined theory shown with adequ

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Mayorov, Alexander, Olga Musina, and Vitaly Loginov. "Assessing Cheese Texture with Deformeter: New Instrumental Options." Cheese- and buttermaking, no. 3 (September 17, 2024): 28–32. http://dx.doi.org/10.21603/2073-4018-2024-3-1.

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A deformeter is a deflection device that measures such structural and mechanical properties of cheese as hardness and elasticity. This technology facilitates cheese quality control. The article describes its operation principles and application options in cheese production. A penetrometer is the most common device for assessing the hardness of cheese. However, it cannot measure plasticity. A deformeter, on the other hand, tests both the elastic and plastic properties of cheese. This research featured Reokon 240 deflection device developed at the Siberian Research Institute of Cheese Making. Ha

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Zhang, Guangjian. "Problems of interpretation of the piano compositions byZhangZhao (on the example of the Fantasy “Pihuang”)." Aspects of Historical Musicology 21, no. 21 (2020): 230–47. http://dx.doi.org/10.34064/khnum2-21.15.

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Background. The article is devoted to the piano work of the famous Chinese composer Zhang Zhao. The focus is on the “Pihuang” Fantasy, which embodies the national characteristics of Peking opera. This work won an honorary award at the 2007 Chinese composition competition for high artistic qualities and deep content. The article examines, how the composer uses the musical elements of the Chinese opera tradition to create a certain drama of the work, how the sound specificity of the timbre colors of the voice, the techniques of vocal sound production and recitation, the image of Chinese instrume

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Kudryashov, A. E., Ph V. Kiryukhantsev-Korneev, S. K. Mukanov, M. I. Petrzhik, and E. A. Levashov. "The effect of electrospark deposition using zirconium electrodes on structure and properties of nickel-containing alloy obtained selective laser melting." Izvestiya vuzov. Poroshkovaya metallurgiya i funktsional’nye pokrytiya, no. 3 (September 6, 2022): 63–77. http://dx.doi.org/10.17073/1997-308x-2022-3-63-77.

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Protective coatings were applied by electrospark deposition (ESD) using zirconium electrodes to improve the performance of the Ni-containing alloy obtained using the selective laser melting (SLM) technology. The kinetics of mass transfer was studied in 5 different frequency-energy processing modes. An analog-to-digital converter was used to determine the average number of pulse discharges, single-pulse energy, and the total energy of pulse discharges for 1 min of processing (ΣЕ) for all the modes used. In low-energy processing modes (ΣЕ = 1459÷2915 J), a weak mass transfer was observed, and th

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Chudnovsky, Alexander. "Experimental and Theoretical Studies of Slow Crack Growth in Engineering Polymers." Key Engineering Materials 345-346 (August 2007): 493–96. http://dx.doi.org/10.4028/www.scientific.net/kem.345-346.493.

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The process zone (PZ) that surrounds and precedes a crack is a common feature of fracture in engineering polymers. Depending on the material, the specimen geometry, the temperature, and the loading conditions various types of microdefects such as crazes, shearbands, microcracks, micro-voids, etc, constitute the process zone. The microdefects are formed in response to stress concentration, and shield the crack tip from high stress level. There is a complex crack – damage interaction, which is briefly addressed by means of a semi-empirical method. On a continuum mechanics level, the PZ appears a

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Vo, Hung Trong, Kien Van Dang, Anh Ngoc Do, and Thai Ngoc Do. "Study on the stability of rock mass around large underground cavern based on numerical analysis: A case study in the Cai Mep project." Journal of Mining and Earth Sciences 63, no. 3a (2022): 50–58. http://dx.doi.org/10.46326/jmes.2022.63(3a).06.

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Geotechnical problems are complicated to the extent and cannot be expected in other areas since non-uniformities of existing discontinuous, pores in materials and various properties of the components. At present, it is extremely difficult to develop a program for tunnel analysis that considers all complicated factors. However, tunnel analysis has made remarkable growth over the past several years due to the development of numerical analysis methods and computer development, given the situation that it was difficult to solve the formula of elasticity, viscoelasticity, and plasticity for the dyn

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Faghidian, S. Ali, and Isaac Elishakoff. "Wave propagation in Timoshenko-Ehrenfest nanobeam: A mixture unified gradient theory." Journal of Vibration and Acoustics, September 27, 2022, 1–26. http://dx.doi.org/10.1115/1.4055805.

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Abstract A size-dependent elasticity theory, founded on variationally consistent formulations, is developed to analyze the wave propagation in nano-sized beams. The mixture unified gradient theory of elasticity, integrating the stress gradient theory, the strain gradient model, and the traditional elasticity theory, is invoked to realize the size-effects at the ultra-small scale. Compatible with the kinematics of the Timoshenko–Ehrenfest beam, a stationary variational framework is established. The boundary-value problem of dynamic equilibrium along with the constitutive model is appropriately

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S., S. Salehi, and Shamloo A. "Design and Fabrication of a Scaffold with Appropriate Features for Cartilage Tissue Engineering." April 1, 2017. https://doi.org/10.5281/zenodo.1130419.

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Poor ability of cartilage tissue when experiencing a damage leads scientists to use tissue engineering as a reliable and effective method for regenerating or replacing damaged tissues. An artificial tissue should have some features such as biocompatibility, biodegradation and, enough mechanical properties like the original tissue. In this work, a composite hydrogel is prepared by using natural and synthetic materials that has high porosity. Mechanical properties of different combinations of polymers such as modulus of elasticity were tested, and a hydrogel with good mechanical properties was s

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Neukamm, Stefan, and Kai Richter. "Linearization and homogenization of nonlinear elasticity close to stress-free joints." Calculus of Variations and Partial Differential Equations 64, no. 6 (2025). https://doi.org/10.1007/s00526-025-03018-1.

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Abstract In this paper, we study a hyperelastic composite material with a periodic microstructure and a prestrain close to a stress-free joint. We consider two limits associated with linearization and homogenization. Unlike previous studies that focus on composites with a stress-free reference configuration, the minimizers of the elastic energy functional in the prestrained case are not explicitly known. Consequently, it is initially unclear at which deformation to perform the linearization. Our main result shows that both the consecutive and simultaneous limits converge to a single homogenize

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Roman, Poya, Ortigosa Rogelio, and J. Gil Antonio. "Variational schemes and mixed finite elements for large strain isotropic elasticity in principal stretches: Closed-form tangent eigensystems, convexity conditions, and stabilised elasticity." May 7, 2023. https://doi.org/10.1002/nme.7254.

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A new computational framework for large strain elasticity in principal stretches is presented. Distinct from existing literature, the proposed formulation makes direct use of principal stretches rather than their squares that is, eigenvalues of Cauchy-Green strain tensor. The proposed framework has three key features. First, the eigen-decomposition of the tangent elasticity and initial (geometric) stiffness operators is obtained in closed-form from principal information alone. Crucially, these newly found eigenvalues describe the general convexity conditions of isotropic hyperelastic energies.

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Komari, Omid, and Zachary Merrill. "Development of an Occupant Load Criterion Model for Vehicle Frontal Crashes: Introduction of a Dynamic Model." Transportation Research Record: Journal of the Transportation Research Board, January 29, 2025. https://doi.org/10.1177/03611981241311577.

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The prevalent method for assessing the forces on a restrained occupant during a collision involves evaluating the restraining forces as the body decelerates in what is known as the occupant load criterion (OLC) model. This model quantifies the restraining forces on frontal occupants during vehicle deceleration in frontal crashes. The original OLC model features a single mass representing the occupant connected to the vehicle via a spring with constant stiffness. The original OLC model assumes that no force is applied to the occupant until the restraint reaches a specified relative distance (sl

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Gupta, Deepak Kumar, and Avanish Kumar Dubey. "Modeling and optimization of Wire –EDM parameters for machining of Ni_54.1Ti_45.9 shape memory alloy using hybrid approach." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, March 7, 2022, 095440892210851. http://dx.doi.org/10.1177/09544089221085144.

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Shape memory alloys are a distinct family of alloys recognized for their unique features, such as extreme anti-fatigue, exceptional specific strength, corrosion resistance, biocompatibility, and pseudo-elasticity. Due to strain-hardening effects displayed by the latter during a conventional machining process, these features make shape memory alloys particularly functional for machining utilizing non-traditional methods rather than conventional ones. The alloy's original qualities are at risk as a result of this consequence. Nickel-Titanium shape memory alloys with 54.1 and 45.9% Nickel-Titaniu

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Lekeckas, Kestutis, Julija Stirbe, Kristina Ancutiene, and Ruta Valusyte. "Testing of 3D printing on textile fabrics for garments application within circular design." International Journal of Clothing Science and Technology, May 23, 2023. http://dx.doi.org/10.1108/ijcst-06-2022-0080.

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PurposeTo explore the influence of various factors on the adhesion strength of 3D printing materials and chiffon fabrics, and to develop an original design clothing prototype with an extended functionality that would be compatible with the specifics of the circular design.Design/methodology/approachFour different chiffon fabrics and four 3D printed materials were chosen as the research subjects to determine the influence of various factors on the adhesion strength and ductility. The uniaxial tensile test was used to determine pull-out force and the pull-out elongation from the interlayer.Findi

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Oliinyk, Viktoriia. "Regional Focus of Ukrainian Book Design Formation." Almanac "Culture and Contemporaneity", no. 2 (December 27, 2022). http://dx.doi.org/10.32461/2226-0285.2.2022.270558.

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The purposeof the article is to study specific regional features in Ukrainian book design and determine the degree of their mutual influence. The research methodology is based on art analysis in the context of historical-chronological, iconographic, inductive, deductive, and comparative methods. The scientific novelty is represented by theses on the differences of conventionally defined Kyiv, Lviv, Kharkiv and Odesa graphic schools, which had an impact on the development of local book design, and, consequently, on the formation of the artistic image of the modern Ukrainian book. The conclusion

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KHOKHLOV, A. V. "HYBRIDIZATION OF THE LINEAR VISCOELASTIC CONSTITUTIVE EQUATION AND A NONLINEAR MAXWELL-TYPE VISCOELASTOPLASTIC MODEL, AND ANALYSIS OF EVOLUTION SCENARIOS OF THE TRANSVERSE STRAIN COEFFICIENT UNDER CREEP." Fizicheskaya Mezomekhanika 1 (2024). http://dx.doi.org/10.55652/1683-805x_2024_27_1_20-48.

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In this work, a generalization of a physically nonlinear Maxwell-type viscoelastoplastic constitutive equation with four material functions is formulated, whose general properties and range of applicability were discussed in a series of our previous studies. In order to expand the range of rheological effects and materials that can be described by the equation, it is proposed to add a third strain component expressed by a linear integral Boltzmann-Volterra operator with arbitrary functions of shear and volumetric creep. For generality and for the convenience of using the model, as well as for

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Hu, Jun, та Rui Ma. "Partial Relaxation of 𝐶0 Vertex Continuity of Stresses of Conforming Mixed Finite Elements for the Elasticity Problem". Computational Methods in Applied Mathematics, 27 травня 2020. http://dx.doi.org/10.1515/cmam-2020-0003.

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AbstractA conforming triangular mixed element recently proposed by Hu and Zhang for linear elasticity is extended by rearranging the global degrees of freedom. More precisely, adaptive meshes {\mathcal{T}_{1},\ldots,\mathcal{T}_{N}} which are successively refined from an initial mesh {\mathcal{T}_{0}} through a newest vertex bisection strategy, admit a crucial hierarchical structure, namely, a newly added vertex {\boldsymbol{x}_{e}} of the mesh {\mathcal{T}_{\ell}} is the midpoint of an edge e of the coarse mesh {\mathcal{T}_{\ell-1}}. Such a hierarchical structure is explored to partially rel

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Wang, Hao, Yinjie Wang, Tianyu Li, et al. "Nature‐Inspired, Heat & Noise‐Insulation, Highly Robust MOFs‐Based Hybrid Fire‐Retardant Coatings with Easy‐Recycling Feature." Advanced Functional Materials, February 2, 2025. https://doi.org/10.1002/adfm.202500800.

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AbstractFlexible polyurethane foams are widely used in building and vehicle interiors due to their lightweight and high resilience. However, most foams are non‐biodegradable or fireproof, leading to serious white foam pollution and safety problems. Here, FPUF made of a porous MOF material loaded with flame retardant elements as a coating is reported, which realizes fire protection, isolation of heat and noise, and recovery of foam. The results show that FPUF‐3 exhibited excellent fire and smoke suppression effects, and PHRR, CO production, and CO2 production are reduced by 28.5%, 54.5%, and 21

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Diego Amadeu Furtado Torres. "Ck-Generalized FEM with enhanced consistency: application to the static linear elastic rod deformation problem." Ibero-Latin American Congress on Computational Methods in Engineering (CILAMCE), December 2, 2024. https://doi.org/10.55592/cilamce.v6i06.10173.

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The Ck-Generalized Finite Element Method (Ck-GFEM) in its original version considers Partition of Unity (PoU) functions defined as Shepard ones, which delivers zeroth order consistency in the absence of uniform polynomial extrinsic enrichment of degree one, at least. Such a feature can make Ck-GFEM unfavorable against the conventional G/XFEM when comparing the degrees-of-freedom (dof) amount for a certain error level. This inconvenience can be overcome through intrinsic enrichment using the Moving Least Squares Method (MLSM), which allows the construction of PoU functions with enhanced polynom

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Frech, Sophie, and Beate M. Lichtenberger. "Modulating embryonic signaling pathways paves the way for regeneration in wound healing." Frontiers in Physiology 15 (February 16, 2024). http://dx.doi.org/10.3389/fphys.2024.1367425.

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Epithelial tissues, including the skin, are highly proliferative tissues with the capability to constant renewal and regeneration, a feature that is essential for survival as the skin forms a protective barrier against external insults and water loss. In adult mammalian skin, every injury will lead to a scar. The scar tissue that is produced to seal the wound efficiently is usually rigid and lacks elasticity and the skin’s original resilience to external impacts, but also secondary appendages such as hair follicles and sebaceous glands. While it was long thought that hair follicles develop sol

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Bažant, Zdeněk P., Wen Luo, Viet T. Chau, and Miguel A. Bessa. "Wave Dispersion and Basic Concepts of Peridynamics Compared to Classical Nonlocal Damage Models." Journal of Applied Mechanics 83, no. 11 (2016). http://dx.doi.org/10.1115/1.4034319.

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The spectral approach is used to examine the wave dispersion in linearized bond-based and state-based peridynamics in one and two dimensions, and comparisons with the classical nonlocal models for damage are made. Similar to the classical nonlocal models, the peridynamic dispersion of elastic waves occurs for high frequencies. It is shown to be stronger in the state-based than in the bond-based version, with multiple wavelengths giving a vanishing phase velocity, one of them longer than the horizon. In the bond-based and state-based, the nonlocality of elastic and inelastic behaviors is couple

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Baratta, Alessandro, and Ottavia Corbi. "An Approach to Masonry Structural Analysis by the No-Tension Assumption—Part I: Material Modeling, Theoretical Setup, and Closed Form Solutions." Applied Mechanics Reviews 63, no. 4 (2010). http://dx.doi.org/10.1115/1.4002790.

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The prevalent feature that characterizes masonry structures and makes them dissimilar from modern reinforced concrete and steel structures is quite definitely their inability to resist tensile stresses. Therefore, it is natural that the material model that is intended to be an “analog” of real masonry cannot resist tensile stress but possibly behaves elastically under pure compression, opening a perspective on the adoption of the no-tension (NT) material constitutive assumption. Founded on the NT theory, the basic direction and aim of the present work is to propose a unified treatment of mason

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