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quencies which correspond to the fiber breakage and the fiber debonding and pulling out shifted to the higher frequency side, and the power spectrum at the frequency which corresponds to the resin cracking became lower. (3) When the tensile speed of FRPET test specimen was changed from 0.2mm/min to 0.05mm/ min, the peak frequencies which correspond to the fiber breakage and the fiber debonding and pulling out shifted to the lower frequency side and the power spectrum became lower. The power spectrum at the frequency which corresponds to the resin cracking was affected by the tensile speed and became higher.

A study on fracture mechanisms of FRPET by frequency analysis of acoustic emission. Effects of sensor position and tensile speed.