Original Article
- The Analysis of Failure Mechanism during Tensile Test of CFRP
- Jong-O Lee, Joo-Suk Lee, Kyung-Sik Cho, Seung-Hee Lee, Sae-Kyoo Oh
- CFRP 복합재료의 인장시험시 파괴기구의 해석
- 이종오(한국기계연구소 비파괴시험실), 이주석(한국기계연구소 비파괴시험실), 조경식(한국기계연구소 비파괴시험실), 이승희(계명대학교 물리학과), 오세규(부산수산대학교)
Abstract
The detection of first ply fracture and the analysis of failure mechanism of the CFRP have been carried out by acoustic emission(AE) measurements. X-ray, optical microscopy during tensile test of [0˚8]， [90˚8] and [0˚/90˚8/0˚] CFRP laminates. ln the case of [90˚8] ply, the failure of the CFRP laminate was found to initiate by intraply matrix cracking(mode I) of the 90˚ ply. ln the case of [0˚8] ply, the initial damage was confirmed by X-ray and 0˚ ply crack (mode II) propagating parallel to the fiber orientation. Much of modeⅡ crack and delamination were found to grow simultaneously, in the cross ply laminates. The amplitude of AE signal by modeⅠ crack is about 10 times lower than that by modeⅡ crack.
The detection of first ply fracture and the analysis of failure mechanism of the CFRP have been carried out by acoustic emission(AE) measurements. X-ray, optical microscopy during tensile test of [0˚8]， [90˚8] and [0˚/90˚8/0˚] CFRP laminates. ln the case of [90˚8] ply, the failure of the CFRP laminate was found to initiate by intraply matrix cracking(mode I) of the 90˚ ply. ln the case of [0˚8] ply, the initial damage was confirmed by X-ray and 0˚ ply crack (mode II) propagating parallel to the fiber orientation. Much of modeⅡ crack and delamination were found to grow simultaneously, in the cross ply laminates. The amplitude of AE signal by modeⅠ crack is about 10 times lower than that by modeⅡ crack.
The detection of first ply fracture and the analysis of failure mechanism of the CFRP have been carried out by acoustic emission(AE) measurements. X-ray, optical microscopy during tensile test of [0˚8]， [90˚8] and [0˚/90˚8/0˚] CFRP laminates. ln the case of [90˚8] ply, the failure of the CFRP laminate was found to initiate by intraply matrix cracking(mode I) of the 90˚ ply. ln the case of [0˚8] ply, the initial damage was confirmed by X-ray and 0˚ ply crack (mode II) propagating parallel to the fiber orientation. Much of modeⅡ crack and delamination were found to grow simultaneously, in the cross ply laminates. The amplitude of AE signal by modeⅠ crack is about 10 times lower than that by modeⅡ crack.
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This Article
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