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Indexed by:期刊论文

Date of Publication:2008-01-01

Journal:COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING

Included Journals:SCIE、EI

Volume:39

Issue:1

Page Number:113-118

ISSN No.:1359-835X

Key Words:property; stress transfer

Abstract:When a fiber/microdroplet tensile specimen solidifies, a spindle-like microdroplet would form naturally, due to the balance role of surface forces at the gas/liquid interface. The stress transfer at the interface between the single aramid fiber and the epoxy microdroplet was studied by micro-Raman spectroscopy under different strain levels. From the fiber entered end to the inner of microdroplet, the fiber axial stress as well as the interfacial shear stress decreases gradually, because the bulk volume of the microdroplet changes along the fiber. Moreover, there exists a larger fiber axial stress and a lesser interfacial shear stress along the fiber and lower stress transfer efficiency under a large strain. Maximum shear stress inside the microdroplet usually locates at 3.5-6.5 fiber radius distances from the interfacial edge. (c) 2007 Elsevier Ltd. All rights reserved.