Abstract
It has been recognized for a long time that inelastic deformations may induce anisotropy in the material response, even if this is initially isotropic. For metallic materials, deformation induced anisotropy is reflected above all by translation, rotation and distortion of the yield surface. This has been confirmed by several experimental investigations independent of the way the yield point is defined. In the present paper a simple, thermodynamically consistent model is proposed., describing the evolving anisotropy of the yield surface. The model is first theoretically established, based on a sufficient condition for the dissipation inequality to be satisfied. Then, it is applied to predict the subsequent yield surfaces, after various prestressings, which have been observed experimentally by Ishikawa.
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Dafalias, Y.F., Schick, D., Tsakmakis, C. (2003). A Simple Model for Describing Yield Surface Evolution During Plastic Flow. In: Hutter, K., Baaser, H. (eds) Deformation and Failure in Metallic Materials. Lecture Notes in Applied and Computational Mechanics, vol 10. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-36564-8_7
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DOI: https://doi.org/10.1007/978-3-540-36564-8_7
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