응집영역모델을 이용한 섬유금속적층판 접착층의 모드 I, II 파괴 거동 물성평가
Evaluation of Fracture Behavior of Adhesive Layer in Fiber Metal Laminates using Cohesive Zone Models
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초록
섬유금속적층판과 같은 하이브리드 소재는 여러 방향의 하중에 의한 접착층의 파괴로 인해 층간분리가 발생할 수 있다. 모든 하중은 수직 방향의 응력과 면내 두 방향의 전단 응력으로 분해할 수 있으며, 이러한 하중은 접착층의 모드 I, II, III 파괴를 일으킨다. 따라서 하중에 의한 층간분리 현상을 예측하기 위해, 접착층의 모드 별 임계 에너지 해방률을 도출하는 것이 중요하다. 본 연구에서는 접착층의 모드 I 임계 에너지 해방률을 측정하기 위해 double cantilever beam 시험을 수행하였으며, 모드 II 임계 에너지 해방률을 측정하기 위해 end-notched flexure 시험을 수행하였다. 또한, 실험으로부터 도출한 임계 에너지 해방률을 ABAQUS의 응집영역모델에 적용하여 유한요소해석을 수행하였으며, 실제 실험 결과와의 비교를 통해 층간분리 현상에 대한 수치해석 기법 적용의 유효성을 입증하였다.
Abstract
An understanding of the failure mechanisms of the adhesive layer is decisive in interpreting the performance of a particular adhesive joint because the delamination is one of the most common failure modes of the laminated composites such as the fiber metal laminates. The interface between different materials, which is the case between the metal and the composite layers in this study, can be loaded through a combination of fracture modes. All loads can be decomposed into peel stresses, perpendicular to the interface, and two in-plane shear stresses, leading to three basic fracture mode I, II and III. To determine the load causing the delamination growth, the energy release rate should be identified in corresponding criterion involving the critical energy release rate (GC) of the material. The critical energy release rate based on these three modes will be GIC, GIIC and GIIIC. In this study, to evaluate the fracture behaviors in the fracture mode I and II of the adhesive layer in fiber metal laminates, the double cantilever beam and the end-notched flexure tests were performed using the reference adhesive joints. Furthermore, it is confirmed that the experimental results of the adhesive fracture toughness can be applied by the comparison with the finite element analysis using cohesive zone model.
참고문헌 (23)
- Rana, S., "Fibrous and Textile Materials for Composite Applications" (2016), Springer Science+Business Media
- Compston, P., "Impact Perforation Resistance and Fracture Mechanisms of a Thermoplastic Based Fiber-Metal Laminate", Journal of Materials Science Letters, 20(7), pp.163~168 (1996)
- Vlot, A., "Impact Loading on Fibre Metal Laminates", International Journal of Impact Engineering, 18(3), pp.291~307 (1996)
- Vlot, A., "Impact Response of Fiber Metal Laminates", Key Engineering Materials, 141, pp.235~276 (1997)
- Wu, G., "The Impact Properties and Damage Tolerance and of Bi-Directionally Reinforced Fiber Metal Laminates", Journal of Materials Science, 42(3), pp.948~957 (2007)
- Vogelesang, L.B., "Development of Fibre Metal Laminates of Advanced Aerospace Structures", Journal of Materials Science, 103(1), pp.1~5 (2000)
- Mosse, L., "Stamp Forming of Polypropylene Based Fiber-Metal Laminates: The Effect of Process Variables on Formability", Journal of materials Processing Technology, 172(2), pp.163~168 (2005)
- Mosse, L., "The Development of a Finite Element Model for Simulating the Stamp Forming of Fibre-Metal Laminates", Composite Structures, 75(1), pp.298~304 (2006)
- 오현주, "극저온 환경에서 에폭시 접착제의 물성 향상을 위한 나노 보강재의 표면 개질에 관한 연구", Composites Research, 26(2), pp.129~134 (2013), 한국복합재료학회
- 정종설, "종류가 다른 부직포가 삽입된 하이브리드 복합재료의 모드 II 층간파괴인성", Composites Research, 26(2), pp.141~145 (2013), 한국복합재료학회
- Williams, J.G., "Large Displacements and End Block Effects in The DCB Interlaminar Test in Modes I and II", Journal of Composite Materials, 21(4), pp.330~347 (1987)
- Williams, J. G., "The Fracture Mechanics of Delaminaion Tests", Journal of Strain Analysis, 24(4), pp.207~214 (1989)
- Hashemi, S., "Corrections Needed in Double-cantilever Beam Tests for Assessing The Interlaminar Failure of Fibre-composites", Journal of Materials Science Letters, 8(2), pp.125~129 (1989)
- "ASTM D5528-13, Standard Test Method for Mode I Interlaminar Fracture Toughness of Unidirectional Fiber-Reinforced Polymer Matrix Composites", ~ (2013)
- Murri, G.B., "Interlaminar GIIc Evaluation of Toughened Resin Matrix Composites using The End-Notched Flexure Test", Proceeding of the 26th AIAA, ASCE, pp.AHS, ASC Structures, Structural Dynamics, and Materials Conference[DOI]
- Carlsson, L. A., "Mode II Interlaminar Fracture Toughness of Graphite", Epoxy and Graphite, Journal of Reinforced Plastics and Composites, pp.1986, 5(3)[DOI]
- Tsai, G. C., "Design of Composite ENF Specimens and Conduct Three-Point Test to Calculate Mode II Fracture Toughness", Proceeding of the 9th International Conference on Engineering Education (2006)
- Gillespie, J.W., "Delaware Composites Design Encyclopedia: Test Methods" (1990), CRC Press
- Blackman, B.R.K., "The Calculation of Adhesive Fracture Energies in Mode I: Revisiting The Tapered Double Cantilever Beam (TDCB) Test", Engineering Fracture Mechanics, 70(2), pp.233~248 (2003)
- 이찬주, "Cohesive Zone Model을 이용한 접착제 물성평가 : 모드 I", 대한기계학회논문집 A, 33(5), pp.474~481 (2009), 대한기계학회
- "ASTM D2094-00, Standard Practice for Preparation of Bar and Rod Specimens for Adhesion Tests", ~ (2000)
- "ASTM D2095-96, Standard Test Method for Tensile Strength of Adhesives by Means of Bar and Rod", ~ (1996)
- Simulia, D. S., "ABAQUS User’s Manual", Dassault Systems, ~ (2013)