Spring-back evaluation of automotive sheets based on isotropic–kinematic hardening laws and non-quadratic anisotropic yield functions, part III: applications

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Complex unloading behavior: Nature of the deformation and its consistent constitutive representation (2011, background): “…when the plastic deformation path includes strain increment reversals, as for example being bent and unbent while being drawn over a die radius (Gau and Kinzel, 2001; Chun et al., 2002; Geng and Wagoner, 2002; Li et al., 2002b; Yoshida et al., 2002; Yoshida and Uemori, 2003a; Chung et al., 2005).”
A practical two-surface plasticity model and its application to spring-back prediction (2007, methodology): “The formulation and material characterization procedure for the modified Chaboche model is documented elsewhere (Lee et al., 2005b).”
Study on the influence of work-hardening modeling in springback prediction (2007, background): “…accurately numerically predicted if only isotropic work-hardening is considered, even if the level of equivalent plastic strain is low, which is in agreement with other authors’ conclusions (Geng and Wagoner, 2002; Li et al., 2002a; Yoshida and Uemori, 2003; Lee et al., 2005; Choi et al., 2006b).”
Simulation of springback variation in forming of advanced high strength steels (2007, methodology): “Fig. 6. Material properties of DP steel [ 33 ].”