Abstract
The dynamic behavior of multiple moving cracks with constant length propagating in the non-homogeneous orthotropic half-plane under anti-plane loading is considered. The Galilean transformation is employed to express the wave equations in terms of coordinates that are attached to the moving crack. Finally, the solution of a moving screw dislocation is obtained in a non-homogeneous orthotropic half-plane. The solution is employed to derive integral equations for a half-plane weakened by several moving cracks. Numerical examples are provided to show the effects of material properties, crack size and the speed of cracks propagating on the stress intensity factors of crack tips.
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