摘要
基于扩展有限单元法(XFEM),采用有限元软件ABAQUS,结合最大主应力准则及损伤型的本构关系,对含裂纹加筋板结构的动态裂纹扩展过程展开了系列数值模拟研究,并分析了网格尺寸、加强筋高度,以及裂纹长度对裂纹扩展过程的影响.计算结果表明,冲击拉伸载荷作用下,裂纹在加强筋和板中交替扩展;网格尺寸对计算结果精度的影响明显;增加加强筋高度、减小裂纹长度可以延迟裂纹开始扩展的时间,并且对于减小裂纹在板中的扩展长度十分有利.
Based on the extended finite element method (XFEM) and finite element software ABAQUS, combined with the maximum principal stress criterion and the constitutive relation of damage type, a series of numerical simulation studies were carried out on the dynamic crack growth process of stiffened plate structures with cracks, and the effects of grid size, stiffener height and crack length on the crack growth process were analyzed. The calculation results show that under the impact tensile load, cracks propagate alternately in the reinforcement and the plate, and the grid size has an obvious effect on the accuracy of the calculation results. Increasing the height of reinforcing ribs and reducing the crack length can delay the crack initiation and propagation time, which is very beneficial for decreasing the propagation length in the plate.
作者
彭英
杨平
柯叶君
姜伟
PENG Ying;YANG Ping;KE Yejun;JIANG Wei(School of Transportation,Wuhan University of Technology,Wuhan 430063, China;Key Laboratory of High Performance Ship Technology of Ministry ofEducation,Wuhan 430063, China;School of Civil Engineering & Mechanics,Huazhong University of Science & Technology,Wuhan 430074, China)
出处
《武汉理工大学学报（交通科学与工程版）》
2019年第3期443-446,451,共5页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家自然科学基金项目资助(51479153)
关键词
扩展有限单元法
含裂纹加筋板
动态裂纹扩展
extended finite element method (XFEM)
cracked stiffened plates
dynamic crack propagation
