EXPERIMENTAL INVESTIGATION ON THETENSILE/COMPRESS BEHAVIOR OF STITCHEDOPEN-HOLE STRUCTURES

摘要

Extensive experimental studies were carried out to investigate the effect ofstitching on laminates’ tensile and compressive properties. Different environmental conditionsand stacking sequence were taken into consideration. Furthermore, specimens with centeropen-holes were tested. Test results indicate that stitching degraded specimens’ tensilestrength considerably, but with different Degradation Rate regarding to different stackingsequence, environment and specimen geometric configuration (with/without open-hole).However, stitching’s effect on compressive properties varies. Further investigation shows thatstitches significantly changed the failure mechanism of these tested specimens by suppressingthe delamination and stabilizing the cracking speed, especially for the open-hole specimens.