圆柱壳周期阵列压痕应力强度因子

摘要

当柱壳平端刚性压头作用在同形的弹性基体表面时,在基体上生成一个平面压痕,同时在压痕边界处的近表面诱生奇异应力场,该奇异应力场的奇异性与裂纹尖端Ⅰ-型应力场的奇异性同价,使平面压痕的表面产生断裂型开裂.利用当量裂纹法给出圆柱壳周期阵列压痕的应力强度因子.%When aperiodic array and cylindrical flat ended rigid indenter is pressed on the cylindrical substrate, a mixed mode I-II singular stress field will induced at the edge of the indentation, which shares ihe same singularity with the same mode cracks and well lead contact boundary to fracture. Based on the equivalent crack method, the stress intensity factors for indentation with periodic array and cylindrical flat ended rigid indenter had been found.