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Determination of the Equivalent Stress–Equivalent Plastic Strain Curve of ECAP-Processed Copper
Transactions of the Korean Society of Mechanical Engineers - AJaehyuck Lee +8 more
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Equivalent plastic strain gradient crystal plasticity – Enhanced power law subroutine
GAMM-Mitteilungen, 2013AbstractA gradient crystal plasticity theory is presented including a defect energy based on the gradient of an equivalent plastic strain measure. Preserving the single crystal slip kinematics, the gradient hardening contribution models dislocation long range interactions adding a back‐stress term to the flow rule, similar to other gradient crystal ...
Wulfinghoff, Stephan, Böhlke, Thomas
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Meccanica, 2019
Simple formulas for calculating equivalent von Mises stress and von Mises effective plastic strain in an elastic–plastic ordinary peridynamic analysis are proposed. The equivalent von Mises stress is calculated by equating the deviatoric part of strain energy obtained from classical continuum mechanics and peridynamics.
Mojtaba Asgari +1 more
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Simple formulas for calculating equivalent von Mises stress and von Mises effective plastic strain in an elastic–plastic ordinary peridynamic analysis are proposed. The equivalent von Mises stress is calculated by equating the deviatoric part of strain energy obtained from classical continuum mechanics and peridynamics.
Mojtaba Asgari +1 more
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Searching slope critical slip surface based on the NMM and equivalent plastic strain
Engineering Analysis with Boundary ElementsShuai Zhu +3 more
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The equivalence of stress- and strain-based plasticity theories
Computer Methods in Applied Mechanics and Engineering, 1997Strain space plasticity theory has been advocated by a number of researchers as a viable alternative to its stress space counterpart. However, there appears to be a certain level of uncertainty about the equivalence of stress- and strain-based plasticity theories.
Lu, P. F., Vaziri, R.
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Strength of Materials, 1987
1. Restrain rearranges the dislocation structure produced by primary strain. 2. The equivalent-strain concept is used to characterize the primary treatment, i.e., the strain giving identical dislocation density curves at the various temperatures. Restrain in hot-pressed molybdenum has been used to show that equivalent strains represent a
V. F. Moiseev +5 more
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1. Restrain rearranges the dislocation structure produced by primary strain. 2. The equivalent-strain concept is used to characterize the primary treatment, i.e., the strain giving identical dislocation density curves at the various temperatures. Restrain in hot-pressed molybdenum has been used to show that equivalent strains represent a
V. F. Moiseev +5 more
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Advanced Materials Research, 2014
The newly proposed rotating bending process of metal tubes is a novel kind of Severe Plastic Deformation (SPD) process, which is expected to refine and control the microstructure of metallic tubular materials. The stress distribution and accumulated equivalent plastic strain of deformation part have a significant influence on the microstructure ...
Zi Cheng Zhang +3 more
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The newly proposed rotating bending process of metal tubes is a novel kind of Severe Plastic Deformation (SPD) process, which is expected to refine and control the microstructure of metallic tubular materials. The stress distribution and accumulated equivalent plastic strain of deformation part have a significant influence on the microstructure ...
Zi Cheng Zhang +3 more
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The equivalent plastic strain-dependent Yld2000-2d yield function and the experimental verification
Computational Materials Science, 2009Abstract An equivalent plastic strain-dependent anisotropic material model was developed for 5754O aluminum alloy sheet. In the developed model, the anisotropy coefficients for Barlat’s Yld2000-2d anisotropic yield function were established as a function of the equivalent plastic strain.
Haibo Wang +3 more
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On the relation of equivalent plastic strain and springback in sheet draw bending
International Journal of Material Forming, 2008In this paper the relation between characteristic (equivalent plastic) strain and springback, taking a benchmark of NUMISHEET'93 2-D draw bending and using the commercial FEM code, ABAQUS, has been investigated. The simulations are preformed for three test materials: AA5754-O, AA6111-T4 and DP-Steel. The effect of process parameters such as blankholder
M. Kadkhodayan, I. Zafarparandeh
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International Journal of Non-Linear Mechanics, 2017
Abstract This paper proposes a generalized expression for the coefficient of equivalent plastic strain based on the associated flow of the Drucker-Prager criterion for geomeaterials. By conducting triaxial compression tests of sandstone samples in the laboratory, the coefficient of pressure sensitivity α and the shearing cohesion k of ...
Xiang Ding, Guangqing Zhang
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Abstract This paper proposes a generalized expression for the coefficient of equivalent plastic strain based on the associated flow of the Drucker-Prager criterion for geomeaterials. By conducting triaxial compression tests of sandstone samples in the laboratory, the coefficient of pressure sensitivity α and the shearing cohesion k of ...
Xiang Ding, Guangqing Zhang
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