ＣＦＲＰ複合材構造の実験的衝撃荷重位置・履歴同定

Abstract

In this paper, we propose an experimental identification method of location and history of impact forces which act on CFRP composite structures. First, a transfer matrix to relate an impact force to sensor responses is directly constructed from experimentally measured force histories and measured sensor responses. Next, the location and history of the applied force are identified using two steps. In the first step, the force history is evaluated as a solution of a quadratic programming problem by using the transfer matrix and measured strain responses. In the second step, the force location is determined as a location where an error between measured sensor responses and evaluated ones is minimized. By repeating the above two steps, both the true location and the history can be identified. Finally, the present method is applied to three kinds of CF/Epoxy laminated plates and a CF/PEEK stiffened panel, and its validity is verified from the experimental results.