ＣＦＲＰ積層パイプにおけるトランスバースクラック進展挙動

Abstract

The damage behavior of transverse cracks in CFRP laminates without free-edges was experimentally investigated. Using laminated pipes with thick and thin 90-degree layers, static tensile tests were conducted with bonded loading fixtures. The transverse cracking behavior in pipes was inspected using ultrasonic C-scanning images. In parallel, tensile tests of coupon specimens of same layup as pipes were also carried out. It is shown that laminated pipes were less susceptible to the accumulation of transverse cracks than coupons with free-edges and the difference tends to be larger as 90-degree layers become thicker.