circular crack meaning in Chinese

圆（圈）形裂纹

The interaction between piezoelectric screw dislocation and circular crack under remote uniform heat flux
均匀热流场中螺型位错与圆弧裂纹的相互作用
This thesis calculates the sifs of circular cracks in a circular bar , writes a computer program to calculate the initial crack ' s growth life in everywhere of the bar , simulates the evolution course of crack from sub - surface to surface and calculates the growth life of sub - surface crack
计算了圆形试棒中任意位置存在圆形裂纹时的应力强度因子，编写了计算程序，可对任意位置处初始裂纹的扩展寿命进行计算。计算了圆形试棒亚表面裂纹扩展到表面的过程和亚表面夹杂的裂纹扩展寿命。