کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1563772 | 999620 | 2009 | 9 صفحه PDF | دانلود رایگان |

To predict the damage evolution of anisotropic plastic voided ductile materials, Gurson–Tvergaard–Needleman (GTN) yield criterion is developed based on Hill’s quadratic anisotropic yield criterion (1948) and isotropic hardening rule for matrix material. A user-defined subroutine is developed using the above model. An implicit stress integration procedure is modified to adapt the explicit dynamic solver. After performing a series of single element tests, cylindrical tension and thick plate tension are analyzed. Then a benchmark of NUMISHEET’2002, i.e. deep drawing of cylindrical cup, is taken as an example of sheet metal forming. Comparisons are made among the von Mises constitutive model, isotropic and anisotropic plastic GTN damage models. It is found that plastic anisotropy of the matrix in ductile sheet metal has influence on both deformation behavior and damage evolution of the material.
Journal: Computational Materials Science - Volume 44, Issue 3, January 2009, Pages 1013–1021