Simulation of propagative instability in shear using gradient-enhanced and viscoplastic model
Chair for Computational Engineering, Cracow University of Technology, Warszawska 24, 31-155 Kraków, Poland.
The research presented in this paper is focused on simulation of a propagative instability called Lueders bands using large strain plasticity with Huber-Mises-Hencky yield function. Two types of regularization are used: gradient-enhanced plasticity and viscoplasticity. Regularization is needed to avoid mesh sensitivity associated with the classical continuum description. A special sample is used to study Lueders band propagation in shear, its shape is motivated by experiments. The gradient-enhanced model used in computation provides a more reliable regularization than the viscoplastic model.
Mucha, M., Wcisło, B., & Pamin, J. (2019). Simulation of propagative instability in shear using gradient-enhanced and viscoplastic model. Computer Methods in Materials Science, 19(2), 57-63. https://doi.org/10.7494/cmms.2019.2.0635
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