Three-dimensional influence coefficient method for cohesive crack simulations

The influence coefficient method, which has advantages for conducting inverse analysis and sensitivity studies, is extended to simulate cohesive cracking in three-dimensional bodies when the crack path is known in advance. The method is combined with a focal point model to allow simulation of unload–reload cycles as well. This paper summarizes the theory behind the influence coefficient method and outlines how the method can be implemented in a numerical simulation program. The scaling factor technique is presented in order to use a single set of influence coefficients to simulate the response of identical bodies made of materials with different moduli of elasticity.