朱子織CFRP積層板の曲げクリープ破壊寿命の予測

抄録

This paper is concerned with the prediction of flexural creep fracture for CFRP laminates consisting of satin woven carbon fibers and high temperature epoxy matrix, of which glass transition temperature T_g=236°C. The flexural creep fracture tests were practically carried out under various stress level at 50°C to be sufficiently lower than the T_g. On the other hand, the static flexural tests were carried out under various deflection rates and temperatures. The master curve of flexural strength of CFRP was obtained by applying the reciprocation law between time and temperature to these experimental results. Furthermore, the flexural creep fracture of CFRP was estimated by utilizing the linear cumulative damage rule adapted to this master curve. The creep fracture predicted by the method mentioned above is fairly well agreed with that measured by creep tests.