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Unified Analysis of Viscoelasticity and Viscoplasticity Using the Onsager Variational Principle [PDF]
EntropyThis study is the application of the Onsager variational principle to viscoelasticity and viscoplasticity with the minimization of the assumptions which are popularly used in conventional approaches.
Kwang Soo Cho
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A viscoplasticity model with an enhanced control of the yield surface distortion
International Journal of Plasticity, 2012 A new model of metal viscoplasticity, which takes combined isotropic, kinematic, and distortional hardening into account, is presented. The basic modeling assumptions are illustrated using a new two-dimensional rheological analogy.
A V Shutov, J Ihlemann
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Plastic and creep deformations of thick-walled cylinder with a rigid casing under internal pressure [PDF]
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2021 The creep and plastic flow of cylindrical pressurized vessel with rigid casing was considered. To combine creep and plastic deformations the vessel was heated and subjected to the high inner pressure. The semi-analytical solution for plain strain problem
Sergey Viktorovich Firsov
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Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2021 An asymptotic model is constructed to describe the bending of thin sheets, or plates, of viscoplastic fluid described by the Herschel–Bulkley constitutive law, which incorporates the von Mises yield condition and a nonlinear viscous stress. The model reduces to a number of previous ones from plasticity theory and viscous fluid mechanics in various ...
Thomasina V. Ball, Neil J. Balmforth
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Implementation of ABAQUS User Subroutines for Viscoplasticity of 316 Stainless Steel and Zircaloy-4
Metals, 2023 This paper describes the formulations for the viscoplasticity of metals based on the Chaboche and Delobelle model. The implementations of the viscoplastic models were detailed herein and then implemented via user subroutines for material models (UMAT) in
Xiaowei Yue, Jinxiong Zhou
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Frontiers in Earth Science, 2023 The stress-strain relationship in shales is generally time-dependent. This concerns their long-term deformation in unconventional reservoirs, and its influence on the in situ stress state therein.
Wei Cheng +13 more
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Mechanisms-Based Transitional Viscoplasticity
Crystals, 2020 When metal is subjected to extreme strain rates, the conversation of energy to plastic power, the subsequent heat production and the growth of damages may lag behind the rate of loading.
Aleksander Zubelewicz
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Simulation of sintering ceramics based on Master Sintering Curve
Nihon Kikai Gakkai ronbunshu, 2021 In this paper, a simple simulation strategy for sintering ceramics is proposed by referring to the experimental results of the deformation profile obtained from a thermomechanical analysis (TMA) under uniaxial compression loads.
Chikako NATSUMEDA +3 more
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Testing metals in tension and relaxation at elevated temperatures
Archives of Mechanics, 2023 This article describes an apparatus for testing viscoplastic metallic alloys in tension at temperatures up to 400°C. Its distinctive feature is a two-shelled furnace which encompasses the test-piece.
M. Darrieulat, A. Aoufi, CH. Desrayaud
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Advanced Engineering Research, 2022 Introduction. Properties of filled composites based on polytetrafluoroethylene allow them to work at high contact pressures, reciprocating nature of shear loads, and in a wide temperature range.
D. S. Petukhov +2 more
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