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미소접합시험과 유한요소법을 통한 섬유/에폭시 복합재의 계면 전단강도 해석
강수근(Soo-Keun Kang),김덕재(Deok-Jae Kim),최낙삼(Nak-Sam Choi),이덕보(Deok-Bo Lee) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.3
In this study, we performed the microbond test by utilizing the microbond specimen with an epoxy micro-droplet adhered onto a carbon fiber. The interfacial shear stress distributions along the fiber/matrix interface were calculated by finite element analysis with three kinds of finite element models such as droplet model, circular 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.