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미소접합시험과 유한요소법을 통한 섬유/에폭시 복합재의 계면 전단강도 해석

Title
미소접합시험과 유한요소법을 통한 섬유/에폭시 복합재의 계면 전단강도 해석
Other Titles
Analysis of Interfacial Shear Strength of Fiber/Epoxy Composites by Microbond Test and Finite Element Method
Author
최낙삼
Keywords
계면 전단강도; Interfacial Shear Strength; 미소드랍리트 접합 시험; Micro-Droplet Bond Test; 탄소섬유/에폭시 복합재료; Carbon Fiber/Epoxy Composite; 유한요소법; Finite Element Method
Issue Date
2006-08
Publisher
한국복합재료학회
Citation
Composites Research, v. 19, No. 4, Page. 7-14
Abstract
미소 드랍릿 시편을 이용한 탄소섬유와 에폭시 수지 사이의 계면전단강도에 대해 시험분석하였다. 또한 드랍릿 모델, 원형단면 모델, 인발모델의 3종류의 유한요소해석을 통해 섬유/수지간의 응력분포를 계산하였다. 본 연구결과는 다음과 같다. (1) 미소드랍릿 시험의 경우는 인발시험보다 섬유/수지의 계면에서 큰 응력집중이 나타났으며 계면박리가 낮은 하중수준에서도 발생하기 용이함을 알수 있었다. (2) 미소드랍릿시험에서 높은 계면강도를 보였는데, 이는 미소드랍릿의 형상과 사이즈, 바이스팁과 접촉하는 부위의 응력집중효과를 함께 받았기 때문으로 해석되었다. Interfacial shear strength between epoxy and carbon fiber has been analyzed utilizing the microbond specimen with an epoxy micro-droplet adhered onto single carbon fiber. The interfacial shear stress distributions along the fiber/matrix interface were calculated by finite element analysis using three kinds of finite element models such as droplet model, circular-crosssection model and pull-out model. Conclusions were obtained as follows. (1) Interfacial shear stress distribution showed that larger stresses were concentrated in the fiber/matrix interface for microbond test than for pull-out test. Thus, debonding at the fiber/matrix interface during microbond test was liable to occur at low load level. (2) Microbond test showed higher interfacial strength which was caused by various effects of micro-droplet geometry and size as well as stress concentration in the region contacting with the micro-vise tip.
URI
http://kiss.kstudy.com/thesis/thesis-view.asp?key=2562112https://repository.hanyang.ac.kr/handle/20.500.11754/108394
ISSN
2288-2103
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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