抄録
This paper is concerned with the influence of water absorption on the time-temperature dependent flexural fatigue strength of unidirectional CFRP laminates, which consist of PAN based carbon fibers and epoxy resin. The CFRP laminates were prepared under three conditions of “Dry”, “Wet(percentage of water content : 0.5%, 1.0% and 2.0%)”and “Wet+Dry” by dehydrating. The constant strain rate (CSR) and fatigue tests for these three kinds of CFRP laminates were carried out under various loading rates and temperatures. It is cleared that the flexural CSR and fatigue strengths of CFRP laminates strongly depend on the water absorption as well as time and temperature, and the time-temperature-water absorption superposition principle holds for these flexural CSR and fatigue strengths as well as the creep compliance of matrix resin.
