Computer simulation of crack propagation in ductile materials under biaxial dynamic loads
The finite-difference computer program HEMP is used to simulate the crack-propagation phenomenon in two-dimensional ductile materials under truly dynamic biaxial loads. A comulative strain-damage criterion for the initiation of ductile fracture is used. To simulate crack propagation numerically, the method of equivalent free-surface boundary conditions and the method of artifical velocity are used in the computation. Centrally cracked rectangular aluminum bars subjected to constant-velocity biaxial loads at the edges are considered. Tensile and compressive loads in the direction of crack length are found, respectively, to increase and decrease directional instability in crack propagation, where the directional instability is characterized by branching or bifurcation.
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7150814
- Report Number(s):
- UCRL-84567; CONF-800875-1
- Resource Relation:
- Conference: 15. international congress of theoretical and applied mechanics, Toronto, Canada, 17 Aug 1980
- Country of Publication:
- United States
- Language:
- English
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