低エネルギの繰返し衝撃によるCFRP積層材の損傷

抄録

A simple experimental method of repeated low-energy impact was devised to provide some insights into the impact damage behavior of CFRP laminates. The macroscopic failure mode and the internal damage as a consequence of repeated impacts were investigated, at some different levels of incident impact energy, with the laminated specimens prepared from different stacking sequences. The results indicated that there existed a critical incident impact energy which led to the delamination and the critical size of delamination which produced the degradation of residual strength. The delamination behavior in the laminated specimens depended largely upon the level of incident impact energy. The stiffer the specimen, the larger the delamination.