摘要
针对含裂纹的弹塑性材料结构,根据弹塑性断裂理论分析了裂纹增长的条件.建立了基于裂纹尖端存在塑性区的计算模型,得到了描述含裂纹弹塑性材料在外荷载作用下的塑性区尺寸及塑性区前端裂纹张开位移的解析解.按照所建立的计算模型对不同的裂纹长度、不同的外荷载对塑性区尺寸及张开位移的影响进行探讨.并给出了材料在外荷载作用下破坏的临界应力强度因子曲线.
According to elastic-plastic fracture mechanics,crack growth conditions of elastic-plastic material mechanism were analyzed.A computation model were built that had plastic zone at in crack tip,and then the analytical solutions were obtained about plastic zone size and crack opening displacement in the front of plastic zone under outer loads.Based on the above-mentioned computation model,the influences of different crack length and outer loads on plastic zone size and crack opening displacement were discussed.And curves of critical stress-intensity factor in critical failure state under outer loads were plotted.
出处
《应用基础与工程科学学报》
EI
CSCD
2011年第5期810-816,共7页
Journal of Basic Science and Engineering
基金
国家自然科学基金资助项目(50975261)
教育部留学回国人员科研启动基金资助项目(208082)
关键词
弹塑性材料
裂纹
仿真
塑性区尺寸
张开位移
临界应力强度因子
Elastic-plastic material
crack
simulation
plastic zone size
crack opening displacement
critical stress-intensity factor
