The objective of this study is to statistically investigate the effect of moisture absorption on the hot/ wet compressive strength of a T800H/PMR-15 carbon/polyimide composite with a quasi-isotropic stacking sequence. Compression tests on moisture absorbed specimens were conducted at 260 C. These tests clarified the compression fracture mode, the effect of moisture absorption on the hot/ wet compressive strength, statistical properties and a design allowable of hot/wet compressive strength, the effectiveness of a traveler coupon in monitoring moisture absorption, and the relationship between specimen thickness and hot/wet compressive strength. Important results were as follows: (1) hot/wet compressive strength was found to be closely related to residual moisture content measured immediately after the test; and (2) the coefficient of variation of hot/wet compressive strength was found to be approximately twice as large as that of room temperature/dry compressive strength.
カーボン/ポリイミド(T800H/PMR-15) 複合材料Hot/Wet圧縮強度に及ぼす吸水の影響
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