ISSN: 0884-6804
Page Count: 5

Method for Hygromechanical Characterization of Graphite/Epoxy Composite
Peimanidis, G
Visiting professor, Research assistant, and professor, Northwestern University, IL

Yaniv, G
Visiting professor, Research assistant, and professor, Northwestern University, IL

Daniel, IM
Visiting professor, Research assistant, and professor, Northwestern University, IL

Abstract

An experimental method is described for measuring hygroscopic swelling strains and mechanical strains of moisture-conditioned composite specimens. The method consists of embedding encapsulated strain gages in the midplane of the composite laminate; thus it does not interfere with normal moisture diffusion. It is particularly suited for measuring moisture swelling coefficients and for mechanical testing of moisture-conditioned specimens at high strain rates. Results obtained by the embedded gage method were shown to be more reliable and reproducible than those obtained by surface gages, dial gages, or extensometers.

Keywords:
graphite/epoxy composites, environmental effects, moisture content, hygroscopic expansion, embedded gages, hygrothermal characterization

Paper ID: CTR10423J
DOI: 10.1520/CTR10423J
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