Spatial Convergence of Crack Prediction on Structured Mesh Based on Distributed Cohesive Element Method

Abstract:

We use the distributed cohesive element method to simulate the dynamic fracture in structural specimen and arbitrary crack path is predicted. The focus in on convergence of the cohesive crack path as an approximation of the real crack as the spatial characteristic mesh size h approaches zero. We propose the structured mesh is satisfactory in capturing the real crack shape as we refine the mesh because the crack Hausdorff distance converges. However, the length of cohesive crack path does not converge as the mesh is refined. There is a finite length deviation between predicted cohesive crack path and physically real crack path on structured mesh.

• Periodical: Advanced Materials Research (Volumes 446-449)
• Pages: 3573-3577
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.446-449.3573
• Online since: January 2012
• Authors: Ming Hua He, Ke Gui Xin, Ding Yu Cui, Yu Fei Liu
• Keywords: Cohesive Element Method, Convergence, Crack Hausdorff Distance, EEB Estimate

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