Journal
COMPOSITE STRUCTURES
Volume 71, Issue 3-4, Pages 320-326Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2005.09.022
Keywords
polymer matrix composites; glass fibers; durability; interphase
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The properties of an E-glass/epoxy composite were examined before and after mechanical loading and moisture conditioning. Preliminary results indicate that the modulus, strength, and strain of the E-glass/epoxy composite material are affected by the presence of moisture and mechanical loading when compared to control specimens. At shorter durations of conditioning at room temperature, a slight increase in strength and a slight decrease in modulus were observed; and at longer durations, 3000 h, a noticeable reduction in strength and strain-to-failure was observed. Specimens conditioned under stress, in water at 65 degrees C for 1000 h exhibited higher loss in modulus. It is speculated that constant stress may have a positive effect in short-term, and that extended exposure to moisture at room temperature leads to brittle failure while exposure at high temperatures may lead to ductile failure of E-glass/epoxy composites. (C) 2005 Elsevier Ltd. All rights reserved.
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