The present paper is addressed to the finite element method combined with dynamicphotoelastic analysis of propagating cracks,that is,on the basis of[1]by Chien Wei-zang,finite elements which incorporate the propagating crack-tip singularity intrinsic to two-dimensional elasticity are employed.The relation between crack opening length and timestep obtained from dynamic photoelastic analysis is used as a definite condition for solvingthe dynamic equations and simulating the crack propagations as well.As an example,theimpact response of dynamic-bending-test.specimen is investigated and the dynamic stress-intensity factor obtained from the mentioned finite element analysis and dynamicphotoelasticity is in reasonable agreement with each other.
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