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http://dx.doi.org/10.7234/kscm.2006.19.4.007

Analysis of Interfacial Shear Strength of Fiber/Epoxy Composites by Microbond Test and Finite Element Method  

Kang, Soo-Keun (한국표준협회 신뢰성기술경영센터)
Lee, Deok-Bo (한국표준협회 신뢰성기술경영센터)
Choi, Nak-Sam (한양대학교 공학대학 기계정보경영공학부)
Publication Information
Composites Research / v.19, no.4, 2006 , pp. 7-14 More about this Journal
Abstract
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.
Keywords
Interfacial Shear Strength; Micro-Droplet Bond Test; Carbon Fiber/Epoxy Composite; Finite Element Method;
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