Abstract
This paper is concerned with the influence of water absorption on the time-temperature dependent tensile strength of CFRP bolted joint. The CFRP bolted joint were treated under three conditions of “Dry”, “Wet (1.0%)” and “Wet+Dry” after molding. Tensile constant-elongation rate (CER) and fatigue tests for these three types of specimens were carried out under various loading-rates and temperatures. The influence of water absorption on time -temperature dependent tensile CER and fatigue strengths was evaluated, and the applicability of time-temperaturewater absorption superposition principle (TTWSP) as well as time-temperature superposition principle (TTSP) was discussed. As results, it was cleared that the tensile CER and fatigue strengths of the CFRP bolted joint depend on water absorption as well as time and temperature, and that TTWSP does not hold always for that strength of these specimens, although TTSP holds for these strengths.
