Open Access

ARTICLE

Recent Developments on Thermo-Mechanical Simulations of Ductile Failure by Meshfree Method

by B. Ren¹, J. Qian¹, X. Zeng¹, A. K. Jha³, S. Xiao⁴, S. Li¹

1 Department of Civil and Environmental Engineering, University of California, Berkeley, CA 94720, USA
2 School of Hydro-power and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
3 NextGen Aeronautics, 2780 Skypark Drive, Suite 400, Torrance, CA 90505, USA
4 Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, IA52242, USA
5 School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China. Corresponding Email: shaofan@berkeley.edu

Computer Modeling in Engineering & Sciences 2011, 71(3), 253-278. https://doi.org/10.3970/cmes.2011.071.253

Abstract

Ductile failure is a complex multi-scale phenomenon evolved from the micro-voids to macro-crack. There are three main failure mechanisms behinds a ductile failure: adiabatic shear band (ASB), spall fracture, and crack. Since this type of thermo-mechanical phenomena involves large deformation and large scale plastic yielding, a meshfree method has intrinsic advantages in solving this kind of problems over the conventional finite element method. In this paper, the numerical methodologies including multi-physics approach for ASB, parametric visibility condition for crack propagation, and multi-scale approach to determine spall strength in simulating ductile failure have been reviewed. A thermo-mechanical coupling algorithm is proposed to incorporate reproducing kernel particle method (RPKM) with rate dependent Johnson-Cook model. Numerical simulations demonstrate that this meshfree method can capture the essential features of a ductile failure.

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