基于近场动力学的角焊缝裂纹扩展  

Fillet Weld Crack Propagation Based on Peridynamic

作　　者：朱波 

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海

出　　处：《建模与仿真》2023年第3期2542-2550,共9页Modeling and Simulation

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。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.

关 键 词：角焊缝裂纹 孔洞缺陷 近场动力学 裂纹扩展 准确性 可行性 

分 类 号：TG1[金属学及工艺—金属学]