AE信号への逆解析に基づいたCFRP積層板中の損傷形態の同定

抄録

AE measurement is effective to evaluate the damage progress in CFRP laminates. However, the damage type identification from the AE waveform is difficult because CFRP laminates have large attenuation that deforms the AE signals when the waves propagate over long distances. To solve this problem, the authors proposed a new inverse analysis method to reconstruct the source signals from the measured AE signals. Because the inversely obtained source signals are not affected by the attenuation of CFRP laminates, this method enabled us to identify transverse cracks that are in-plane AE sources and delamination that are out-of-plane AE sources.