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首页> 外文期刊>WSEAS Transactions on Applied and Theoretical Mechanics >Dynamic analysis of cracks running at a constant velocity in a strip
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Dynamic analysis of cracks running at a constant velocity in a strip

机译：带钢中等速裂纹的动态分析

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摘要

The scattering of a time-harmonic anti-plane shear (SH) wave by finite length cracks with constant velocity in an elastic medium is considered. In the first case, cracks are assumed to propagate in an infinite elastic space. In the second case, the problems of propagation of subsurface crack and edge crack propagating with uniform velocity in a half-space are treated. In the third case, based on the extension of the dislocation model and images method for the free surface, an analysis of the scattering of SH waves by cracks moving in a strip is carried out. The effects of the wave number, crack velocity and relative position of the cracks are presented. The dynamic stress intensity factors (SIFs) are numerically computed and the results are shown graphically.
机译：考虑了在弹性介质中等速有限时裂纹对时谐反平面剪切波的散射。在第一种情况下，假定裂纹在无限的弹性空间中传播。在第二种情况下，解决了在半空间中以均匀速度传播地下裂纹和边缘裂纹的传播问题。在第三种情况下，基于位错模型的扩展和对自由表面的成像方法，分析了在条带中移动的裂纹对SH波的散射。给出了波数，裂纹速度和裂纹相对位置的影响。数值计算了动态应力强度因子（SIF），并以图形方式显示了结果。

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