Crack propagation behavior in plates under mixed-mode repeated impulsive loading was investigated. The mixed mode impact loading was generated on a inclined center cracked plate specimen by the repeated impact tensile machine constructed based on the Maekawa type impact tensile machine. The direction and the rate of crack propagation in plates under mixed mode impact fatigue loading were measured and compared with those under mixed mode non-impact loading. Strain energy density criterion was attempted to account for both the rate of crack propagation and the direction of the crack extension under mixed-mode impulsive loading condition.
