Strength prediction of impact damaged composites An engineering model

A simple method for predicting the uniaxial compression strength of laminated composites containing impact damages is presented. The method is based on a simplified model of the damage zone and a fracture criterion originally developed for notched laminates. This approach allows to derive a closed-form equation expressing the post-impact strength as a function of the damage size and damage intensity. The properties of the damaged laminate are characterized by two parameters which have to be determined from experimental data. Some examples are given showing that the predicted strength is in good agreement with test results. (orig.)Available from TIB Hannover: RR 2088(19-93 PUB)ME / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman