吸水による耐熱用炭素繊維強化ポリイミド(CFRP)の衝撃値向上

抄録

  Effect of water absorption on Charpy impact value has been studied for a carbon fiber reinforced polyimide (CFRP). The water absorption for 200,000 s lasting more than two days enhanced the impact value and softened the CFRP. The impact value was 13.4% higher than that of CFRP before treatment, although it. The water absorption also enhanced Weibull coefficient (n), indicator of reproducibly, and the lowest impact value (a_s) estimated by modified Weibull equation for safety design. Consequently, the high reliability of CFRP was confirmed even in the water absorbed envelopment.