期刊
INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
卷 23, 期 8, 页码 1096-1132出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/1056789513518953
关键词
Large deformations; damage; anisotropy; hardening; finite elements; forming limit diagram
资金
- German Science Foundation within PAK343 'Methods for quasistatic-dynamic combined forming processes' [TP3]
- German Science Foundation within CRC/Transregio 40 'Fundamental Technologies for the Development of Future Space-Transport-System Components under High Thermal and Mechanical Loads' [TPD3]
In metal forming, formability is limited by the evolution of ductile damage in the work piece. The accurate prediction of material failure requires, in addition to the description of anisotropic plasticity, the inclusion of damage in the finite element simulation. This paper discusses the application of an anisotropic hyperelastic-plasticity model with isotropic damage to the numerical simulation of fracture limits in metal forming. The model incorporates plastic anisotropy, nonlinear kinematic and isotropic hardening and ductile damage. The constitutive equations of the proposed model are numerically integrated both implicitly and explicitly, and the model is implemented as a user material subroutine UMAT in the commercial solvers ABAQUS/Standard and LS-DYNA, respectively. The numerical examples investigate the potential of the constitutive framework regarding the prediction of failure in metal forming processes such as, e.g. cross-die deep drawing. In particular, simulations of the Nakazima stretching test with varying specimen geometry are utilized to simulate the forming limit diagram at fracture and the numerical results are compared to experimental data for aluminium alloy sheets.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据