LOW-VELOCITY IMPACT DAMAGES AND POST-IMPACT FATIGUE BEHAVIOR FOR HIGH TEMPERATURE POLYMER MATRIX COMPOSITES

摘要

The objective of this paper is to investigate the post-impact fatigue behavior for the interesting and candidates high temperature polymer matrix composites in Japanese Supersonic Research Program. There is a remarkable influence of low-velocity impact damage on fatigue lives. The larger impact damaged area and lower residual compression strength has lower fatigue lives. The normalized S-N curves in term of static strength are consistent with those of open-hole fatigue regardless of materials. The post-impact fatigue lives can be successfully predicted on the basis of the normalized S-N curve and residual compressive strength.