带轴向运动裂纹圆柱壳的应力场

本文利用Ｆｏｕｒｉｅｒ积分变换技术，研究了轴向匀速扩展圆柱壳的应力场求解问题，得到了裂纹尖端应力场的小参数解．结果表明，裂纹尖端应力场的强度与裂纹扩展速度有关，而应力场的角分布与裂纹扩展速度无关；且当裂纹扩展速度达到一定值时，运动裂纹出现分枝现象．

Stress Field around an Axial Running Crack in a Cylindrical Shell

Using Fourier-integral transform technique, the paper studies the solution problem ofthe stress field around an axial moving crack with constant velocity in a cylindrical shell andobtains a small parameter solution of the stress field around crack tip. The result shows thatthe trength of the stress field around crack tip varies with crack propagation velocity, whileangular distribution of the stress field does not. Moreover, when ctack moving velocity arrives a a certain value, branchy phenomena well be found in the running cracks.