Hygrothermal effects on the mechanical properties of glass fibre-epoxy composite material

Mohan, Kumar M and Jagannathan, N and Jeeva, Peter M and Ravi, Kumar S (2010) Hygrothermal effects on the mechanical properties of glass fibre-epoxy composite material. In: Proceedings of Second International Conference on Polymer Processing and Characterization , 15-17 Jan 2010, Kottayam, Kerala.

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Abstract

In this study, the hygrothermal effects on the mechanical properties of Glass Fiber Reinforced Plastic (GFRP) composite material was investigated. Unidirectional GFRP composite material was tested to determine tensile, flexure and Inter-laminar shear strength (ILSS) under both room temperature (RT) and hot-wet conditions. Prior to testing, hot-wet specimens were hygrothermally aged in an environmental chamber, maintained at 710C and 85 % relative humidity (RH) for 1%wt moisture absorption. Tests were performed in a computer controlled 50 kN servo-hydraulic test machine. For hot-wet tests, a split type environmental chamber was fixed to the machine which was also maintained at 710C and 85 % RH during the tests. The test data obtained was statistically analyzed to determine mean strength and B-basis design allowables. A comparative study was made to investigate the effect of moisture in the GFRP material at hot-wet and room temperature conditions, which showed a reduction in the strength. Presence of moisture in the epoxy matrix, in the fiber-matrix interface and the chemical attack of moisture on the glass fibers are the main reasons for reduced strength of GFRP material in hot-wet condition.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: GFRP;Moisture;Tensile;Flexure;ILSS
Subjects: AERONAUTICS > Aeronautics (General)
ENGINEERING > Structural Mechanics
Depositing User: Ms. Alphones Mary
Date Deposited: 21 May 2014 06:05
Last Modified: 02 Nov 2015 03:23
URI: http://nal-ir.nal.res.in/id/eprint/11970

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