摘要
混凝土的断裂特性对工程安全起着关键作用。相场断裂法能方便地模拟出裂纹的动态扩展过程,利用UEL和UMAT子程序,实现混凝土相场断裂的Abaqus二次开发,分析了单元尺寸和长度尺度参数对三点弯曲混凝土梁裂纹扩展宽度的影响。研究结果表明:当单元尺寸足够小时,裂纹宽度将不再受单元尺寸的影响,裂纹宽度随长度尺度参数减小而减小。
The fracture characteristics of concrete play a key roles in engineering safety. The phase-field fracture method can simulate the dynamic growth process of cracks conveniently. In this paper,the secondary development of the concrete phase field fracture method based on Abaqus was realized by using UEL and UMAT subroutines,the influences of element size and length scale parameters on crack propagation width of concrete beams were analyzed in the three-point bending test. The results show that the crack width is not affected by the element size until it is small enough and the crack width decreases with the decrease of length scale parameter.
作者
潘军
王鸿
赵冰
徐亚星
李涛峰
龙承运
PAN Jun;WANG Hong;ZHAO Bing;XU Ya-xing;LI Tao-feng;LONG Cheng-yun(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,China)
出处
《交通科学与工程》
2022年第1期8-14,共7页
Journal of Transport Science and Engineering
关键词
混凝土梁
相场断裂法
裂纹宽度
concrete beam
phase field fracture method
crack width
