基于近场动力学的角焊缝裂纹扩展

Fillet Weld Crack Propagation Based on Peridynamic

摘要: 本文以键基近场动力学理论为基础，研究角焊缝裂纹与孔洞缺陷下的裂纹扩展，分别预设2a = 10 mm，2a = 8 mm与2a = 6 mm裂纹进行裂纹扩展模拟，且与试验作对比验证模拟的准确性；并预设半径为R = 1.5 mm的孔洞进行裂纹扩展模拟，以验证用键基近场动力学用于模拟角焊缝裂纹扩展的可行性。

Abstract: Based on the theory of bond-based peridynamics, this paper studies the crack propagation of fillet weld crack and hole defect, the cracks 2a = 10 mm, 2a = 8 mm and 2a = 6 mm are preset respec-tively for crack propagation simulation, and compares with the experiment to verify the accuracy of simulation; A hole with radius R = 1.5 mm is preset for crack propagation simulation, so as to verify the feasibility of using bond-based peridynamics to simulate the crack propagation of fillet weld.