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Elastic-plastic modeling of hardening materials using a corotational rate based on the plastic spin tensor

Ghavam, K ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.1115/PVP2007-26426
  3. Publisher: 2008
  4. Abstract:
  5. In this paper based on the multiplicative decomposition of the deformation gradient, the plastic spin tensor and the plastic spin corotational rate are introduced. Using this rate (and also lograte), an elastic-plastic constitutive model for hardening materials are proposed. In this model, the Armstrong-Frederick kinematic hardening and the isotropic hardening equations are used. The proposed model is solved for the simple shear problem with the material properties of the stainless steel SUS 304. The results are compared with those obtained experimentally by Ishikawa [1]. This comparison shows a good agreement between the results of proposed theoretical model and the experimental data. As another example, the Prager kinematic hardening equation is used. In this case, the stress results are compared with those obtained by Bruhns et al. [2], in which they used the additive decomposition of the strain rate tensor. Copyright © 2007 by ASME
  6. Keywords:
  7. Corotational rates ; Elastic-plastic materials ; Finite deformations ; Plastic spin ; Computer simulation ; Mathematical models ; Problem solving ; Stainless steel ; Strain hardening ; Stress analysis ; Plastic deformation
  8. Source: 2007 ASME Pressure Vessels and Piping Conference, PVP 2007, San Antonio, TX, 22 July 2007 through 26 July 2007 ; Volume 3 , 2008 , Pages 439-446 ; 0277027X (ISSN); 0791842819 (ISBN); 9780791842812 (ISBN)
  9. URL: https://asmedigitalcollection.asme.org/PVP/proceedings-abstract/PVP2007/42819/439/322144