Academic literature on the topic 'Deformations (Mechanics)'

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Journal articles on the topic "Deformations (Mechanics)"

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UBRIACO, MARCELO R. "QUANTUM DEFORMATIONS OF QUANTUM MECHANICS." Modern Physics Letters A 08, no. 01 (January 10, 1993): 89–96. http://dx.doi.org/10.1142/s0217732393000106.

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Based on a deformation of the quantum mechanical phase space we study q-deformations of quantum mechanics for qk=1 and 0<q<1. After defining a q-analog of the scalar product on the function space we discuss and compare the time evolution of operators in both cases. A formulation of quantum mechanics for qk=1 is given and the dynamics for the free Hamiltonian is studied. For 0<q<1 we develop a deformation of quantum mechanics and the cases of the free Hamiltonian and the one with a x2-potential are solved in terms of basic hypergeometric functions.
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Armstrong, Ronald W. "Bertram Hopkinson's pioneering work and the dislocation mechanics of high rate deformations and mechanically induced detonations." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 372, no. 2015 (May 13, 2014): 20130181. http://dx.doi.org/10.1098/rsta.2013.0181.

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Bertram Hopkinson was prescient in writing of the importance of better measuring, albeit better understanding, the nature of high rate deformation of materials in general and, in particular, of the importance of heat in initiating detonation of explosives. This report deals with these subjects in terms of post-Hopkinson crystal dislocation mechanics applied to high rate deformations, including impact tests, Hopkinson pressure bar results, Zerilli–Armstrong-type constitutive relations, shock-induced deformations, isentropic compression experiments, mechanical initiation of explosive crystals an
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Liu, Chuanbo, Chengqing Yuan, and Shutian Liu. "The Effect of Intrinsic Mechanical Properties on Reducing the Friction-Induced Ripples of Hard-Filler-Modified HDPE." Polymers 15, no. 2 (January 4, 2023): 268. http://dx.doi.org/10.3390/polym15020268.

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Ripple deformations induced by friction on polymeric materials have negative effects on the entire stability of operating machineries. These deformations are formed as a response to contacting mechanics, caused by the intrinsic mechanical properties. High-density polyethylene (HDPE) with varying silicon nitride (Si3N4) contents is used to investigate different ripple deformation responses by conducting single-asperity scratch tests. The relationship between the intrinsic mechanical properties and the ripple deformations caused by filler modifications is analyzed in this paper. The results show
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Brovko, G. L. "Elements of nonlinear continuum mechanics in the modern theory." Izvestiya MGTU MAMI 9, no. 2-4 (July 20, 2015): 34–43. http://dx.doi.org/10.17816/2074-0530-67114.

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The theoretical advancement in the field of modern nonlinear continuum mechanics is discussed. The paper includes elements of the mathematical apparatus, development of the foundations of a General tensor theory of mechanical processes and their representations, including generalization of concepts of objective derivatives and integrals, concepts of tensor measures of stresses and deformations, new approaches in theory of the resistance of solids to deformation.
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Tsai, M. Y., C. H. Huang, and C. Y. Huang. "Hygrothermal Effect on Deformations of QFN Electronic Packaging." Journal of Mechanics 22, no. 4 (December 2006): 271–79. http://dx.doi.org/10.1017/s1727719100000927.

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AbstractThe hygrothermal-mechanical behavior of a quad flat non-lead (QFN) package without a chip inside is investigated experimentally and numerically. The present study is focused on understanding the effect of the inherent hygrothermal behaviors of epoxy molding compound (EMC) on the deformations of QFN package. Prior to studying the package, the coefficient of moisture expansion for the EMC is measured experimentally. Full-field moiré and Twyman-Green interferometries are used for measuring the real-time in-plane and out-of-plane deformations of the specimen, respectively, under thermal an
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Dansereau, Véronique, Jérôme Weiss, Pierre Saramito, and Philippe Lattes. "A Maxwell elasto-brittle rheology for sea ice modelling." Cryosphere 10, no. 3 (July 1, 2016): 1339–59. http://dx.doi.org/10.5194/tc-10-1339-2016.

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Abstract. A new rheological model is developed that builds on an elasto-brittle (EB) framework used for sea ice and rock mechanics, with the intent of representing both the small elastic deformations associated with fracturing processes and the larger deformations occurring along the faults/leads once the material is highly damaged and fragmented. A viscous-like relaxation term is added to the linear-elastic constitutive law together with an effective viscosity that evolves according to the local level of damage of the material, like its elastic modulus. The coupling between the level of damag
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Vispute, Devarsh M., Prem K. Solanki, and Yoed Rabin. "Large surface deformation due to thermo-mechanical effects during cryopreservation by vitrification – mathematical model and experimental validation." PLOS ONE 18, no. 3 (March 9, 2023): e0282613. http://dx.doi.org/10.1371/journal.pone.0282613.

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This study presents a simplified thermal-fluids (TF) mathematical model to analyze large surface deformations in cryoprotective agents (CPA) during cryopreservation by vitrification. The CPA deforms during vitrification due to material flow caused by the combined effects of thermal gradients within the domain, thermal contraction due to temperature, and exponential increase in the viscosity of the CPA as it is cooled towards glass transition. While it is well understood that vitrification is associated with thermo-mechanical stress, which might lead to structural damage, those large deformatio
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Tang, Pengbin, Stelian Coros, and Bernhard Thomaszewski. "Beyond Chainmail: Computational Modeling of Discrete Interlocking Materials." ACM Transactions on Graphics 42, no. 4 (July 26, 2023): 1–12. http://dx.doi.org/10.1145/3592112.

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We present a method for computational modeling, mechanical characterization, and macro-scale simulation of discrete interlocking materials (DIM)---3D-printed chainmail fabrics made of quasi-rigid interlocking elements. Unlike conventional elastic materials for which deformation and restoring force are directly coupled, the mechanics of DIM are governed by contacts between individual elements that give rise to anisotropic deformation constraints. To model the mechanical behavior of these materials, we propose a computational approach that builds on three key components. ( a ): we explore the sp
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Fares, N. "Effective Mechanical Properties of Composites at Finite Deformations." Journal of Applied Mechanics 60, no. 1 (March 1, 1993): 8–14. http://dx.doi.org/10.1115/1.2900784.

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A new representation theorem for the deformation gradient rate in the presence of cracks and kinematic constraints is presented. This representation theorem uses an extension of the concept of transformation strains to finite deformations. Based on the representation theorem the overall concentration factor was decomposed into contributions from the opening and sliding of cracks and from material nonhomogeneities. Also, inelastic deformations at the microscale were related to those at the macroscale through elastic concentration factors, where it was found that some of the elastic deformation
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Frishter, Ludmila. "INFINITESIMAL AND FINITE DEFORMATIONS IN THE POLAR COORDINATE SYSTEM." International Journal for Computational Civil and Structural Engineering 19, no. 1 (March 29, 2023): 204–11. http://dx.doi.org/10.22337/2587-9618-2023-19-1-204-211.

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The deformation problem of elasticity theory with regard to nonlinear deformations is examined. The expressions of deformations through displacements in the orthogonal curvilinear coordinate system are recorded. The relations for finite deformations in cylindrical and polar coordinate systems are derived. Physical relations for finite deformations and corresponding generalized stresses are recorded. 
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Dissertations / Theses on the topic "Deformations (Mechanics)"

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Student, James John. "The Box Ankle and Ocmulgee shear zones of central Georgia: a study of geochemical response to Southern Appalachian deformation events." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09192009-040411/.

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Wentworth, Stephen Thomas. "A qualitative study of planar elastic deformations." CSUSB ScholarWorks, 1994. https://scholarworks.lib.csusb.edu/etd-project/909.

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Pelillo, Enrico. "Scratch deformations of polymers." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286438.

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Wadwalkar, Saurabh Sunil Jackson Robert L. "A study of elastic plastic deformation of heavily deformed spherical surfaces." Auburn, Ala., 2009. http://hdl.handle.net/10415/1957.

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Jiang, Tianci. "Impact & penetration studies simplified models and and materials design from AB initio methods /." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/10443.

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In recent impact and penetration mechanical tests, steel projectiles (AISI4340) were impacted into targets like concrete with striking velocities (1200 m/s to 1500 m/s). Results indicated a material removal from the nose of the projectile, phase changes of the projectile materials, a reduction in the length of the projectile, and a blunting of the nose shape. These observations cannot be explained by current theories and numerical integration code that are used to study impact and penetration mechanics. Thus, the objectives of the thesis research are to (a) formulate and characterize the mech
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Okada, Hiroshi. "Boundary element methods for linear and nonlinear solid mechanics problems : and fracture toughness enhancement mechanisms in ceramic materials." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/19169.

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Wang, Changxin. "Large deformation and no-tension analysis of selected problems in soil mechanics." Thesis, The University of Sydney, 2001. https://hdl.handle.net/2123/27804.

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The research carried out in this thesis is two-fold, covering the application of large deformation analysis in soil mechanics, and the problem of tensile failure of soil. The work may be conveniently divided into four sections. (1) Four large deformation analysis approaches have been implemented in the finite element package AFENA. Discussions of the advantages and limitations of the four approaches are given, based on the formulations adopted in these approaches and the results of analyses of some test problems. The applicability of the four approaches for some selected soil mechanic
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Li, Jianxiong. "The lamellar structure and deformation mechanisms of [beta]-polypropylene." Click to view the E-thesis via HKUTO, 1997. http://sunzi.lib.hku.hk/hkuto/record/B31237368.

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Graham, Samuel Jr. "The stress state dependence of finite inelastic deformation behavior of FCC polycrystalline materials." Thesis, Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/16802.

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Tanner, Albert Buck. "Modeling temperature and strain rate history effects in OFHC CU." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/17143.

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Books on the topic "Deformations (Mechanics)"

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Ieşan, Dorin. Thermoelastic deformations. Dordrecht: Kluwer Academic, 1996.

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Michael, Ellis, and Geological Survey (U.S.), eds. 3D-DEF: a user's manual: A three-dimensional, boundary element modeling program. Denver, CO: U.S. Dept. of the Interior, U.S. Geological Survey, 1993.

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Michael, Ellis, and Geological Survey (U.S.), eds. 3D-DEF: a user's manual: A three-dimensional, boundary element modeling program. Denver, CO: U.S. Dept. of the Interior, U.S. Geological Survey, 1993.

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Michael, Ellis, and Geological Survey (U.S.), eds. 3D-DEF: a user's manual: A three-dimensional, boundary element modeling program. Denver, CO: U.S. Dept. of the Interior, U.S. Geological Survey, 1993.

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Howell, Peter. Applied solid mechanics. Cambridge: Cambridge University Press, 2009.

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Besson, Jacques. Non-linear mechanics of materials. Dordrecht: Springer, 2010.

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Burhanettin, Altan, ed. Severe plastic deformation: Toward bulk production of nanostructured materials. New York: Nova Scince, 2005.

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1948-, François Dominique, ed. Structural components: Mechanical tests and behavioral laws. London: ISTE Ltd., 2007.

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Ogden, R. W. Non-linear elastic deformations. Mineola, N.Y: Dover Publications, 1997.

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A, Meyers Marc, Murr Lawrence Eugene, and Staudhammer Karl P, eds. Shock waves and high-strain-rate phenomena in materials. New York: Marcel Dekker, 1992.

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Book chapters on the topic "Deformations (Mechanics)"

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Talpaert, Yves R. "Deformations." In Tensor Analysis and Continuum Mechanics, 171–261. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-015-9988-7_3.

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Ibrahimbegovic, Adnan. "Large displacements and deformations." In Nonlinear Solid Mechanics, 257–360. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2331-5_4.

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Strømmen, Einar N. "Deformations of Beams, Trusses and Frames." In Structural Mechanics, 97–110. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44318-4_5.

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Verruijt, Arnold. "Elastic Stresses and Deformations." In An Introduction to Soil Mechanics, 213–17. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-61185-3_26.

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Romano, Antonio, and Addolorata Marasco. "Finite and Infinitesimal Deformations." In Continuum Mechanics using Mathematica®, 83–113. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-1604-7_3.

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Bauer, Svetlana, and A. Smirnov. "Thermo-elastic deformations of mirrors." In Asymptotic Methods in Mechanics, 163–74. Providence, Rhode Island: American Mathematical Society, 1993. http://dx.doi.org/10.1090/crmp/003/10.

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Bufler, H., R. Lautenbach, and H. Schneider. "Thin Extensional Beams under Large Deformations." In Computational Mechanics ’86, 499–505. Tokyo: Springer Japan, 1986. http://dx.doi.org/10.1007/978-4-431-68042-0_66.

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Gaveau, Bernard, Julian Ławrynowicz, and Leszek Wojtczak. "Statistical Mechanics of a Crystal Surface." In Deformations of Mathematical Structures II, 265–88. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1896-5_11.

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Bonetti, Elena, and Michel Frémond. "Incompressibility and Large Deformations." In Springer Series in Solid and Structural Mechanics, 187–205. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-48884-4_10.

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Pavilainen, Galina. "Elasto-plastic deformations of ribbed plates." In Asymptotic Methods in Mechanics, 227–33. Providence, Rhode Island: American Mathematical Society, 1993. http://dx.doi.org/10.1090/crmp/003/16.

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Conference papers on the topic "Deformations (Mechanics)"

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Ganczarski, A. "Analysis of large deformations of long flexible bars." In Experimental Mechanics. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902578-2.

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Abstract. This work presents a comparison the results of the real deformation of a four-segment fly rod used to the feeder method with the results obtained from the theory and the FEM. The experiment of bending comprises preparation of the measuring path, in which the real fly rod is loaded by a series of forces subsequently changing both magnitude and inclination. The FEM model of the fly rod is based on the beam element and the variation of the cross-section is subjected to stepping approximation. The theoretical model takes advantage of the classical elliptic integral formulation applied to
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Pavilaynen, G. V., and N. V. Naumova. "Elastic-plastic deformations of SD-beams." In 2015 International Conference on Mechanics-Seventh Polyakhov's Reading. IEEE, 2015. http://dx.doi.org/10.1109/polyakhov.2015.7106764.

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Zhang, Z. X., W. B. Pan, S. F. Wang, and Q. H. Lei. "Impact of Discontinuities with Slip-Weakening Friction on the Structural Deformation of a High-Speed Railway Tunnel inJointed Stratified Rock Masses Under Cyclic Train Loadings." In 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0243.

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ABSTRACT It is crucial to assess the performance of a high-speed railway tunnel under dynamic train loading since structural deformations may lead to safety-relevant issues, such as train derailment or rollover. The structural deformation of a high-speed railway tunnel results from the train loading-induced response and interaction of tunnel structures and surrounding rock masses. Our research investigates the slippage behavior of discontinuities with slip-weakening friction around a tunnel under dynamic train loadings, and further analyzes their impacts on structural deformations. A distinct
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Zhang, Peter, Daniel Su, Mark Van Dyke, and Bo Hyun Kim. "A Case Study of Shale Gas Well Casing Deformation in Longwall Chain Pillars Under Deep Cover." In 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0082.

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ABSTRACT Shale gas wells in longwall chain pillars are subject to longwall-induced overburden movements. Longwall mining on either side of the chain pillars can induce deformations in gas well casings. The casing deformations induced by longwall mining has raised the safety concern that casing integrity might be diminished so that intrusive shale gas could leak into the longwall mine with serious consequences. This study deals with longwall-induced casing deformations of eight shale gas wells in the chain pillars between two adjacent longwall panels in the Pittsburgh coal seam under a cover de
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Wang, Roy, and C. Ross Ethier. "Residual Deformations of Ocular Tissues." In ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14368.

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Biomechanics and mechanobiology play a potentially significant role in several ocular pathologies. Glaucoma is perhaps the best studied of these, but other ocular conditions where mechanics are important include retinal detachment and macular degeneration (1, 2). Knowledge of the mechanical properties of the relevant ocular tissues, including their constitutive relationships, is required to understand the biomechanical basis of pathology and also for developing biomechanically mediated therapies. Towards this end, it is necessary to understand the residual strain state of relevant ocular tissu
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Šulc, P., L. Pešek, V. Bula, and P. Šnábl. "Dynamic tensile experiments of hard rubber on Instron test machine under finite deformations." In Engineering Mechanics 2023. Institute of Thermomechanics of the Czech Academy of Sciences, Prague, 2023. http://dx.doi.org/10.21495/em2023-255.

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Su, Daniel W., and Peter Zhang. "Longwall-Induced Deformations and Shale Gas Well Casing Stresses: Engineering Principles." In 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0037.

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ABSTRACT This paper summarizes important findings from the ongoing National Institute for Occupational Safety and Health (NIOSH) gas well stability research. Over the past seven years, field instrumentation results from NIOSH case studies and active mine-by case studies indicate that, under shallower covers, the measured horizontal displacements within the longwall abutment pillar are one order of magnitude higher than those measured under deep cover. Longwall-induced horizontal displacements occur along weak-to-strong rock interfaces; the sharper the bending stiffness contrast across the inte
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"TESTING OF HPD MODEL OF DISSIPATED ENERGY OF HARD RUBBERS AT TORSIONAL FINITE DEFORMATIONS AND TEMPERATURES." In Engineering Mechanics 2019. Institute of Thermomechanics of the Czech Academy of Sciences, Prague, 2019. http://dx.doi.org/10.21495/71-0-367.

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Manzhirov, Alexander V. "Mechanics of Growing Solids: New Track in Mechanical Engineering." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-36712.

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A vast majority of objects around us arise from some growth processes. Many natural phenomena such as growth of biological tissues, glaciers, blocks of sedimentary and volcanic rocks, and space objects may serve as examples. Similar processes determine specific features of many industrial processes which include crystal growth, laser deposition, melt solidification, electrolytic formation, pyrolytic deposition, polymerization and concreting technologies. Recent researches indicates that growing solids exhibit properties dramatically different from those of conventional solids, and the classica
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Vyrovoy, Valeriy, Vladimir Sukhanov, and Svetlana Sukhanova. "Interaction of deformations and the structure of composites." In IX INTERNATIONAL CONFERENCE ON ACTUAL PROBLEMS OF ENGINEERING MECHANICS (APEM2022). AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0168084.

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Reports on the topic "Deformations (Mechanics)"

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Zhang, Xinghang. Deformation mechanisms of nanotwinned Al. Office of Scientific and Technical Information (OSTI), November 2016. http://dx.doi.org/10.2172/1331877.

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El-Azab, Anter. STATISTICAL MECHANICS MODELING OF MESOSCALE DEFORMATION IN METALS. Office of Scientific and Technical Information (OSTI), April 2013. http://dx.doi.org/10.2172/1073049.

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Brongers. PR-186-063516-R01 Stress Corrosion Cracking in Areas of Local Deformation. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), August 2009. http://dx.doi.org/10.55274/r0010299.

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Local areas of deformation (wrinkles and dents) have been recognized as one of the leading causes of failures in both gas and liquid pipelines.This research had four objectives: (1) update the industry survey of GRI Project 8756 on SCC at deformations, (2) demonstrate that a crack mouth monitoring technique can be used on full-scale pipe samples with dents to study the mechanical component of near-neutral-pH stress corrosion growth, (3) evaluate the effect of dents on the SCC crack growth rate (CGR), as compared with pipe base metal, and (4) investigate whether hydrotesting can be used as an e
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McNaney, J., B. Torralva, J. Harper, J. Nguyen, D. Orlikowski, V. Raevsky, M. Meyers, et al. Strain Rate Scaling of Deformation Mechanisms. Office of Scientific and Technical Information (OSTI), February 2006. http://dx.doi.org/10.2172/1987606.

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Real Fernández, Elena. ¿PUEDE HABER 5 FASES DE DEFORMACIÓN HERCÍNICA EN LA ZONA DE VALDEMORILLO (MADRID)? Ilustre Colegio Oficial de Geólogos, October 2020. http://dx.doi.org/10.21028/erf.2020.10.27.

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This work aims to understand the processes that have taken part in the deformation, both on a small and large scale, of metamorphic materials in Valdemorillo area, located in the west of the Community of Madrid and within the Spanish Central System. The objective is to understand the kinematic evolution and the specific mechanical behaviour of igneous-metamorphic materials from the area, deformed by certain efforts developed throughout the Hercynian Orogeny. Therefore, a structural analysis has been carried out throughout a geological mapping scaled 1: 25000 and the analysis of various petrogr
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Hirshfeld, Allen. Deformation Quantization in Quantum Mechanics and Quantum Field Theory. GIQ, 2012. http://dx.doi.org/10.7546/giq-4-2003-11-41.

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Tresa M. Pollock. Ruthenium Aluminides: Deformation Mechanisms and Substructure Development. Office of Scientific and Technical Information (OSTI), May 2005. http://dx.doi.org/10.2172/877368.

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Horgan, Cornelius O. Large Deformation Failure Mechanisms in Nonlinear Solids. Fort Belvoir, VA: Defense Technical Information Center, January 1995. http://dx.doi.org/10.21236/ada293010.

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Sangid, Michael D., and Ajey Venkataraman. Deformation Mechanisms at Grain Boundaries in Polycrystals. Office of Scientific and Technical Information (OSTI), September 2019. http://dx.doi.org/10.2172/1566034.

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Daly, Samantha, Marissa Linne, Michael Sangid, and Ajey Venkataraman. Deformation Mechanisms at Grain Boundaries in Polycrystals. Office of Scientific and Technical Information (OSTI), December 2019. http://dx.doi.org/10.2172/1577947.

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