摘要
为了研究裂纹在纯Ⅱ型加载下的疲劳扩展特性,本文对十字型试样进行了改进。有限元分析表明这种试样具有较均匀的剪应力场,通过实验应力测试并得到了验证。用曲线拟合法得到了Ⅱ型应力强度因子的表达式。
A cruciform specimen was developed in order to investigate the fatigue crack growth be- haviors under pure mode Ⅱ loading.The finite element method and J-integral analysis showed that a uniform shear stress field was achieved in the central region of the cruciform specimen.It was exam- ined by experimental stress analysis. The expression of Mode Ⅱ stress intensity factor was derived from the curve fitting.
基金
国家自然科学基金
关键词
十字型试样
Ⅱ型应力强度因子
curciform specimen
Mode Ⅱ stress intensity factor.
