Moisture absorption and mechanical and acoustic responses in shear of a glass fiber fabric/epoxy resin composite |
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Authors: | A Naceri |
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Institution: | (1) Laboratory of Materials, Faculty of Sciences and Engineering, University of M’sila, Algeria |
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Abstract: | An analysis of the mechanical and acoustic responses of a laminate composed of 12 layers of glass fiber fabric/epoxy resin
and conditioned in environments with relative humidities of 0, 60, and 96% RH at 60°C is presented. The first part of the
study consists in following the weight gain according to the duration of hygrothermal conditioning, and the second part—in
test ing 45°-oriented specimens in uniaxial tension up to failure at constant imposed displacement rates, with registrating
the acoustic emission to track the damage process. The influence of moisture content in the material showed up as a significant
decrease in its shear modulus, shear stress, and acoustic emission with growing quantity of absorbed water. An exponential
function is proposed for describing the relationship between the varying shear modulus and the shear strain.
Russian translation published in Mekhanika Kompozitnykh Materialov, Vol. 43, No. 5, pp. 595–602, September–October, 2007. |
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Keywords: | mechanical response acoustic emission moisture absorption woven-fabric composite |
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