Home List of Titles Stress integration method for a nonlinear kinematic/isotropic hardening model and its characterization based on polycrystal plasticity
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/191282
- Stress integration method for a nonlinear kinematic/isotropic hardening model and its characterization based on polycrystal plasticity
- Cardoso, Rui P. R.; Yoon, Jeong Whan
- Sheet metal forming processes generally involve non-proportional strain paths including springback, leading to the Bauschinger effect, transient hardening, and permanent softening behavior, that can be possibly modeled by kinematic hardening laws. In this work, a stress integration procedure based on the backward-Euler method was newly derived for a nonlinear combined isotropic/kinematic hardening model based on the two-yield’s surfaces approach. The backward-Euler method can be combined with general non-quadratic anisotropic yield functions and thus it can predict accurately the behavior of aluminum alloy sheets for sheet metal forming processes. In order to characterize the material coefficients, including the Bauschinger ratio for the kinematic hardening model, one element tension–compression simulations were newly tried based on a polycrystal plasticity approach, which compensates extensive tension and compression experiments. The developed model was applied for a springback prediction of the NUMISHEET’93 2D draw bend benchmark example.
- Publication type
- Journal article
- International Journal of Plasticity, Vol. 25, no. 9 (Sep 2009), pp. 1684-1710
- Publication year
- FOR Code(s)
- 0905 Civil Engineering; 0912 Materials Engineering; 0913 Mechanical Engineering
- Anisotropy; Backward-Euler method; Nonlinear kinematic hardening; Polycrystal plasticity; Springback
- Publisher URL
- Copyright © 2008 Elsevier Ltd. All rights reserved.
- Additional information
- The authors acknowledge support from the Ministerio da Ciencia e Ensino Superior (FCT-Portugal) under the PTDC/CTM/74286/2006 program.
- Peer reviewed