The problem of impact induced delamination in layered composites (Abrate [
]) is considered and numerically modelled on the basis of the following assumptions: the layers are elastic, interface softening laws are used to simulate the progressive interlaminar decohesion due to delamination (Allix and Corigliano [
], Corigliano [
]). An explicit dynamic finite element code is used for the step by step analysis.