[논문]점진적 파손해석을 이용한 탄소섬유강화 복합재료 볼트 조인트의 파손거동 예측

윤동현; 김상덕; 김재훈; 도영대

doi:10.7234/composres.2021.34.2.101

점진적 파손해석을 이용한 탄소섬유강화 복합재료 볼트 조인트의 파손거동 예측
Prediction of Failure Behavior for Carbon Fiber Reinforced Composite Bolted Joints using Progressive Failure Analysis 원문보기

Composites research = 복합재료, v.34 no.2, 2021년, pp.101 - 107

윤동현 (Department of Mechanical Engineering, Chungnam National University) , 김상덕 (Department of Mechanical Engineering, Chungnam National University) , 김재훈 (Department of Mechanical Engineering, Chungnam National University) , 도영대 (HANKUK FIBER GROUP)

초록
AI-Helper

복합재료를 활용하여 설계되는 구조물은 각 부품들의 조립, 체결부를 갖게 된다. 이러한 연결 또는 조인트는 구조에서 잠재적으로 취약 부분이 될 수 있다. 복합재료 볼트 조인트의 파손모드는 구조 안전성을 위해 베어링 파손모드로 설계된다. 베어링 파손모드로 파괴되는 복합재료 볼트 조인트의 하중-변위 관계는 초기 파손 발생 후 비선형 거동을 보이며, 점진적인 파손을 보인다. 이러한 비선형적이고 점진적인 복합재료 볼트 조인트의 파손거동을 정확히 예측하기 위해 본 연구에서는 기존의 파손해석 모델에서 전단 손상변수 계산 과정에 수정을 수행하였다. 수정된 파손해석 모델을 이용하여 복합재료 볼트 조인트의 베어링 응력-베어링 변형률 결과를 예측하였으며, 기존 수정되지 않은 해석모델과 비교를 통해 수정된 모델의 유효성을 입증하였다.

Abstract ▼ AI-Helper

Composite structures have components and joints. Theses connections or joints can be potentially weak points in the structure. The failure mode of the composite bolted joint is designed as a bearing failure mode for structural safety. The load-displacement relation exhibits bearing failure mode shows a nonlinear behavior after the initial failure and progressive failure behavior. In order to accurately predict the failure behavior of composite bolted joints, this study modified the shear damage variable calculation process in the existing progressive failure analysis model. The results of the bearing stress-bearing strain of the composite bolted joint were predicted using the modified progressive failure analysis model, and the modified model was verified through comparison with the previous progressive analysis model.

주제어

표/그림 (9)

그림 Fig. 1. Failure mode of composite bolted joint
그림 Fig. 2. Geometry and dimension for composite bolted joint specimen
그림 Fig. 3. Test configuration for joint tests
그림 Fig. 4. Analysis model for composite bolted joint
표 Table 1. Properties of T700/Epoxy composite material
그림 Fig. 5. Boundary conditions for single element analysis
그림 Fig. 6. Stress-strain curves for single element analysis and mechanical property test results
그림 Fig. 7. Bearing stress-bearing strain curves obtained from test and analysis results for composite bolted joints
그림 Fig. 8. Failure mode of composite bolted joints

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상세보기

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