변형률 에너지 해방률에 기반한 Carbon/Epoxy 직교적층판의 모드 I 층간 및 층내 파괴 특성 분석
The Characteristics for Mode I Interlaminar and Intralaminar Fractures of Cross-Ply Carbon/Epoxy Composite Laminates Based on Energy Release Rate
0
조회
0
다운로드
3
인용
0
참고문헌
키워드
초록
본 논문에서는 Cross-ply 탄소섬유/에폭시 복합재 적층판의 모드 I 층간분리 특성을 분석하였다. 이를 위하여 Cross-ply 시편에 대한 Double-Cantilever Beam(DCB) 시험을 수행하였다. Cross-ply DCB 시편의 경우 층간 및 층내 파괴를 포함한 복합적인 균열 성장과 기하학적 대변형에 의한 비선형성을 수반하였다. 따라서 변형률 에너지 해방률과 유한요소해석을 기반으로 비선형성을 수반한 DCB 시험에서도 적용되는 모드 I 층간 파괴인성 평가방법을 제안하고 기존의 선형이론으로 구한 결과와 비교 분석하였다. 본 연구에서 제안한 방법으로 Cross-ply DCB 시편의 모드 I 층간 파괴인성과 모드 I 층내 파괴인성을 분류하였고 모드 I 층내 파괴인성이 더욱 낮음을 확인하였다.
Abstract
This paper describes the characteristics for mode I interlaminar and intralaminar fractures of cross-ply carbon/epoxy composite laminates. We obtained mode I interlaminar fracture toughness and mode I intralaminar fracture toughness based on energy release rate and Finite Element Analysis (FEA). For this purpose, the Double-Cantilever Beam (DCB) test and FEA were performed for cross-ply DCB specimens. Also, the behavior of loaddisplacement curve at the interlaminar and intralaminar crack was analyzed. The results show that mode I intralaminar fracture toughness was lower than mode I interlaminar fracture toughness in the cross-ply DCB specimen.
참고문헌 (16)
- "ASTM D5528, Standard Test Method for Mode I Interlaminar Fracture Toughness of Unidirectional Fiber-Reinforced Polymer Matrix Composites", ~
- A. Laksimi, "Mode I Interlaminar Fracture of Symmetrical Cross-ply Composites", Composites Science and Technology, 41(2), pp.147~164 (1991)
- S. Bazhenov, "Interlaminar and Intralaminar Fracture Modes in 0", 90 Cross-ply Glass, Composites, pp.1995, 26(2)[DOI]
- A. De Morais, "Mode-I Interlaminar Fracture of Carbon", epoxy Cross-ply Composites, 2002, pp.62(5), 679~686
- "ASTM D3039, Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials", ~
- "ASTM D3518, Standard Test Method for In-Plane Shear Response of Polymer Matrix Composite Materials by Tensile Test of a ±45° Laminate", ~
- M. W. Czabaj, "Comparison of Intralaminar and Interlaminar Mode I Fracture Toughnesses of a Unidirectional IM7", 8552 Carbon, Composites Science and Technology, pp.2013, 89[DOI]
- M. De Moura, "Interlaminar and Intralaminar Fracture Characterization of Composites under Mode I Loading", Composite Structures, 92(1), pp.144~149 (2010)
- G. Frossard, "Ply Thickness Dependence of the Intralaminar Fracture in Thin-ply Carbonepoxy Laminates", Composites Part A : Applied Science and Manufacturing, 109, pp.95~104 (2018)
- M. Iwamoto, "Intralaminar Fracture Mechanism in Unidirectional CFRP Composites : Part I : Intralaminar Toughness and AE Characteristics", Engineering Fracture Mechanics, 64(6), pp.721~745 (1999)
- S. Jose, "Intralaminar Fracture Toughness of a Cross-ply Laminate and Its Constituent Sub-laminates", Composites Science and Technology, 61(8), pp.1115~1122 (2001)
- G. Pappas, "Intralaminar Fracture of Unidirectional Carbon", epoxy Composite : Experimental Results and Numerical Analysis, 2016, pp.85, 114~124
- N. Choi, "Delamination Fracture of Multidirectional Carbon-fiber", epoxy Composites under Mode I, Mode II and Mixed-mode I, Journal of Composite Materials, pp.1999, 33(1)[DOI]
- A. Pereira, "Mode I Interlaminar Fracture of Carbon", epoxy Multidirectional Laminates, 2004, pp.64(13-14), 2261~2270
- M. B. M. Rehan, "Experimental Study of the Influence of Ply Orientation on DCB Mode-I Delamination Behavior by Using Multidirectional Fully Isotropic Carbon", epoxy Laminates, 2017, pp.161, 1~7
- Z. H. Xie, "Study on the Mode I Interlaminar Fracture Toughness of Multi-directional Composite Laminates", Advanced Materials Research, 718, pp.186~190 (2013)