Reliability Evaluation of Interfacial Shear Strength on Single Carbon-Fiber/Rubber-Modified Epoxy Resin System

Abstract:

Rubber-modified epoxy resins are used as a matrix material for glass and carbon-fiber composites. Mechanical properties of fiber reinforced composites depend on the interfacial shear strength between the reinforced fiber and the matrix resin. This study is focused on the interfacial shear strength in the reinforced carbon fiber and rubber-modified epoxy resin system. To evaluate interfacial shear strength between the fiber and the resin, pull-out test is performed using a microdroplet method. Based on experimental results, numerical analysis was also simulated. It is concluded that the interfacial shear strength of carbon fiber/unmodified epoxy resin system was higher than that of carbon fiber/modified epoxy resin system. The reason for decreased the interfacial shear strength of rubber-modified system is that contractive forces in neat epoxy resin acting on carbon fiber were less than those in rubber-modified epoxy resin system.

• Periodical: Key Engineering Materials (Volumes 297-300)
• Pages: 1784-1789
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.297-300.1784
• Online since: November 2005
• Authors: Deok Bo Lee, Tae Won Kim, Uoo Chang Chung
• Keywords: Carbon-Fiber/Epoxy Composites, Interfacial Property, Interfacial Shear Strength IFSS, Reliability, Reliability Evaluation, Rubber-Modified Epoxy Resin, Stress Distribution

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