Identification of Impact Force on Stiffened Composite Panels

Abstract

In this paper, identification of an impact force acting on a CFRP stiffened panel is conducted by two different impact force identification methods, i.e. the model-based identification method and the experimental identification method. Both methods use the relations between the impact force and strain responses at measurement positions. The two methods differ, depending on whether the relations are determined analytically using the finite element method or experimentally from impact tests. By employing the relations, the location and force history of the impact force are identified by adjusting the corresponding strain responses to the measured strain responses. The validity and effectiveness of the two identification methods are verified by comparing the identification results with the actual impact force acting on the CFRP stiffened panel.