Experimental evaluation of internal damage and heat generation of CFRP laminates due to impact loading

抄録

CFRP laminates were subjected to impact loading with different impact energy by means of a falling weight impact testing machine. The impact loading caused internal damage within CFRP laminates such as delamination, transverse cracks and debonding. In addition to the internal damage, impact loading caused heat generation within CFRP laminates. Therefore, the heat generation was measured in realtime by an infrared thermography. On the other hand, the internal damage within CFRP laminates was evaluated quantitatively by means of cross-sectional observation by an optical microscopy. In the evaluation, length and number of cracks were measured on a micrograph of the cross-section of specimens after impact loading. Then, distribution of internal damage with regard to distance from impact point was clarified. After all, the relationship between heat generation and internal damage was discussed by comparing change in temperature with amount of internal damage. The mechanism of heat generation was considered finally.