Open Access

ARTICLE

Material Point Method Simulation of Equal Channel Angular Pressing Involving Large Plastic Strain and Contact Through Sharp Corners

V. Lemiale^1,2, J. Nairn³, A. Hurmane¹

1 CSIRO, Clayton, VIC, Australia
2 Monash University, Clayton, VIC, Australia
3 Oregon State University, Corvallis, OR, U.S.A

Computer Modeling in Engineering & Sciences 2010, 70(1), 41-66. https://doi.org/10.3970/cmes.2010.070.041

Abstract

We assessed the suitability of the Material Point Method (MPM) to simulate the equal channel angular pressing technique (ECAP). This severe plastic deformation process combines several interesting and challenging features in the context of numerical simulations, namely large displacements, large plastic deformations, as well as abrupt contact changes between the rigid tools and the work piece. Moreover, ECAP has been intensively studied, experimentally, numerically and theoretically, which makes it an ideal benchmark for testing MPM. Results from finite element analysis are also presented for comparison to MPM because this method is widely considered as a robust and reliable computational technique that has often been successfully applied to severe plastic deformation processes. In general, an excellent agreement is found in the predictions made by the two numerical methods. However, we found that to successfully simulate such processes with MPM, prior contact methods should to be replaced with a new contact algorithm. The new contact method is presented and should improve other MPM simulations with contact as well.

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Keywords

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