Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 26, 2022 - September 28, 2022
In recent years, the demand for CFRP is steadily growing because of its high specific strength. Since CFRP laminates show complex fracture modes, an accurate damage detection technique is anticipated to be developed. In this study, we aimed to detect the micro damage of CFRP laminates in the early stage of fatigue. We focused on the DC potential difference method because it is a convenient measurement one using the conductivity of CFRP. The potential difference decreased in the early stage of fatigue test and turned to increase at the very end of fatigue test. The cross-sectional observations on fatigued specimens confirmed that transverse crackings and interlaminar delaminations occurred during the descending process of the potential difference. The results of this study indicated the need to focus on the decrease of potential difference to detect the early stage of fatigue damage in CFRP laminates.
