Abstract
The present paper discusses an experimental identification method of impact forces acting on CFRP stiffened panels. Especially the present paper develops an impact force identification method under multiple loading. First, a transfer matrix to relate an impact force to sensor responses is determined experimentally by using an impulse hammer test. Next, the location and history of the applied force are identified using measured strain responses. The validity of the present identification method is verified through the experimental results of CFRP stiffened panels for both single and double impact loadings. The effect of impactor tip stiffness on the identification results is also examined using hard and soft tips. It is shown that the impact forces can be identified accurately even for the multiple loading using the experimental transfer matrix obtained by an impulse hammer test with a hard tip.
