음향 방출 신호를 이용한 다방향 유리/에폭시 복합재 적층판의 가교된 섬유 수 추정에 관한 연구
Study the Estimation of the Number of Bridging Fibers of Multidirectional Glass/Epoxy Laminates Using the Acoustic Emission Signals
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참고문헌
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초록
본 논문에서는 음향 방출 신호를 이용한 다방향 유리/에폭시 복합재 적층판의 가교된 섬유 수 추정에 관한 연구를 수행하였다. 다방향 복합재 파괴 거동 분석을 위하여 DCB 시험을 수행하였고, 시편의 파단 시 발생하는 탄성파를 측정하기 위하여 음향 방출 센서를 활용하였다. 일방향 복합재 적층판의 초기 가교된 섬유 수를 참고 문헌 및 섬유 체적 비를 통하여 추정하였다. 다방향 복합재 적층판의 초기 가교된 섬유 수 추정을 위하여 음향방출 에너지의 상대적 비를 이용하였다. 추정한 초기 가교된 섬유들의 수를 유한요소모델에 적용하였으며, 유한요소해석 결과와 시험 결과 사이에 유사한 경향을 확인하였다.
Abstract
This paper presents a study on estimating the number of bridging fibers in multidirectional glass/epoxy composite laminates using acoustic emission signals. DCB test was conducted for analyzing the fracture behavior of multidirectional composite laminates, and acoustic emission sensor was utilized to measure the elastic wave generated upon specimen fracture. For unidirectional composite laminates, the initial number of bridging fibers was estimated through reference paper and fiber volume fraction. To estimate the initial number of bridging fibers for multidirectional composite laminates, the relative ratio of acoustic emission signals was utilized. The estimated number of bridging fibers was applied to FEM, and the results of FEM showed good agreement with experimental results.
참고문헌 (22)
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