Abstract
Studies on the brittle-to-ductile failure transition of metals subjected to impact are presented. We use the element-free Galerkin method and its capability to model large deformations with ease. This is particularly important for ductile failure modes as high strain gradients occur in the core of a shear. The key novelty of our method is that we model brittle and ductile failures with the approach. Therefore, we use the strong discontinuity approach, where cracks and shear bands are modeled in the same manner. The loss-of-material stability condition determines the onset of failure and simultaneously the orientation of the crack or shear band, respectively. The accuracy and robustness of our method will be validated by comparing numerical results to impact experiments on single- and double-notched specimens. We also show that the results are independent of the discretization once a certain refinement is obtained.
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