反共振周波数変化に基づく CFRP 積層梁のはく離領域の判定

概要

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Recently composite laminated structures have been applied to many structures of vehicles. Because of its low interlaminar strength, delamination can be generated in the structures easily by external impact forces. Since the existence of delamination degrades compression stiffness of the structures, it is very important to identify delamination nondestructively. In the present study, we propose the delaminated domain location method of CFRP laminated beams using anti-resonance frequency change. The anti-resonance frequencies on a frequency response function are changed from an intact state by existence of delamination. The criteria for judging existence of a delamination between the actuation point and the measurement point on vibration test is devised. The present method is applied to delaminated domain location of CFRP laminated beams and the effectiveness of the present method is shown.
一般社団法人日本機械学会の論文
2001-12-25