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TECHNICAL PAPERS

An Improvement of Multiaxial Ratchetting Modeling Via Yield Surface Distortion

[+] Author and Article Information
Ludovic Vincent, Sylvain Calloch

LMT-Cachan, ENS de Cachan/UMR CNRS 8535/Université, Paris 6, 61, avenue du Président Wilson, F-94235 Cachan Cedex, France

Tadeusz Kurtyka

CERN, EST/ME, CH-1211 Geneva 23, Switzerland

Didier Marquis

IFMA, Campus des Cézeaux-BP 265, F-63175 Aubière Cedex, France

J. Eng. Mater. Technol 124(4), 402-411 (Sep 30, 2002) (10 pages) doi:10.1115/1.1494450 History: Received June 05, 2001; Revised April 02, 2002; Online September 30, 2002
Copyright © 2002 by ASME
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References

Figures

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Comparison between the locations of a von Mises yield surface (a) and a distorted yield surface (b) to obtain the same plastic flow direction, after a typical 2D ratchetting loading path
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Proposed description of yield surfaces
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Distortional variables’ limits of evolution imposed by the constitutive equations to guarantee the convexity of the yield surface
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Rotation of the moving coordinate system. Comparison with the constitutive law proposed by Kurtyka and Zyczkowski 48.
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Definition of equipotentials in the context of a distorted yield surface
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Monotonic tension simulation
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Uniaxial cyclic hardening simulations with increasing strain amplitude
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Uniaxial ratchetting simulations. Influence of mean stress.
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2D Ratchetting simulation: comparison between polycrystalline, von Mises and distortional models. σ11=80 MPa,ε12=±0.1%.
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2D Ratchetting simulations: influence of cyclic strain amplitude
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Validation test: a “butterfly” simulation. Comparison between the polycrystalline and the distortional model.
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Monotonic tension test. Comparison with 316L stainless-steel response.
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Uniaxial cyclic hardening tests with increasing strain amplitudes
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Uniaxial ratchetting test with σ11=100±140 MPa
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2D Ratchetting tests: influence of cyclic strain amplitude
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Validation test: a “butterfly” test

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