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，研究了轴向为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。且当裂纹扩展速度这到一定位时，运动裂纹出现分枝现象。

Stress Field around an Axial kunning Crack in a Cylindrical Shell

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