Simulation of Crack Initiation and Propagation Using CRACK3D
Both experimental and numerical studies show that failure initiation in ductile materials can be quantified by effective plastic strain and stress constraint (Hancock, et al. 1976, Wilkins, et al. 1980, Johnson and Cook 1985, Thomason 1998, Zuo, et al. 2004, and so on). To simulate crack initiation and propagation, the failure initiation criterion (Zuo, Sutton and Deng, Fatigue & Fracture of Engineering Materials & Structures, 27(3), 2004) was implemented to CRACK3D. A crack will initiate at the location where the failure criterion is satisfied in a component and then propagate with increasing of deformation.
For demonstration purpose of the methodology, a L-shape component made of aluminum alloy 2024-T3 was used to show how to use CRACK3D to predict crack initiation and propagation in engineering structures.
Demonstration of Crack Initiation and Propagation
Initial finite element model (no crack) and boundary conditions
|Animation of mesh update||Animation of result (global)||Animation of result (zoom-in)|