کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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782675 | 1465055 | 2009 | 8 صفحه PDF | دانلود رایگان |
The effect on forming-limit diagrams (FLD) of an initial cube texture and its evolution was studied using the well-known M–K approach in conjunction with a viscoplastic crystal plasticity model (VPSC). We focused on how the strength of the cube texture affects localized necking. In particular, we addressed the results of Wu et al. [Effect of cube texture on sheet-metal formability. Materials Science and Engineering A 2004;364:182–7] who found that a spread about cube exhibits unexpectedly high limit strains. The FLD and yield loci were determined for several spreads about {1 0 0}〈0 0 1〉 with uniform or Gaussian distributions. A smooth transition in predicted limit strains from the ideal cube, through textures with increasing cut-off angles, to a random texture was calculated using the MK-VPSC approach. Results indicate that the constitutive model selected has a critical importance for predicting the behavior of materials that exhibit a qualitative change in the crystallographic texture, and hence, evolve anisotropically during mechanical deformation.
Journal: International Journal of Mechanical Sciences - Volume 51, Issue 6, June 2009, Pages 473–480