摘要
为简便、准确地获得Q235材料的应力强度因子值和J积分值,用Abaqus对Q235材料进行有限元仿真,得到三点弯曲试样及其裂纹尖端区域的应力分布情况;针对裂纹尖端的奇异性,引入折叠单元进行裂纹尖端单元的奇异性建模.不同尺寸试件应力强度因子仿真值与试验值基本一致,表明该方法可以准确预测材料断裂参数.
To get the stress intensity factor and J integral value of material Q235 conveniently and accurately, finite element simulation is performed on fracture toughness of material Q235 by Abaqus, and the stress distributions of three-point bending specimen and its crack tip are obtained ; as to the singularity of crack tip, the singularity modeling of crack tip elements is carried out by introducing collapsed element. The simulation values of stress intensity factors of samples with different sizes are consistent with the test values. The results indicate that the material fracture parameters can be predicted accurately.
出处
《计算机辅助工程》
2012年第4期40-42,共3页
Computer Aided Engineering
关键词
Q235材料
断裂韧性
三点弯曲试样
裂纹尖端
奇异性
有限元
material Q235
fracture toughness
three-point bending specimen
crack tip
singularity
finite element
作者简介
董达善（1956-），男，浙江镇海人，教授，博导，博士，研究方向为金属结构设计和钢结构失效分析．（E-mail） dsdong@ shmtu, edu. cn
