Abstract
GFRP specimens were irradiated with various doses of gamma and electron radiations ranging from 60 to 200 Mrad. Tensile tests using an Instron Model-1185 have been utilized to study the effect of these radiations on the mechanical strength of GFRP. A typical load-elongation curve of this composite consists of two stages. The first stage is linear, and the deformation produced is elastic. Beyond the first linear stage, the change of slope of the curve is attributed to the initiation and extension of cracks at fibre ends. Evidence of decrease as well as increase in the strength of specimens has been observed at different doses of radiation. The electron irradiation increases the strength of GFRP at all doses of irradiation except 200 Mrad. However, gamma irradiation decrease the strength of GFRP. The ductile and brittle character of GFRP has been explained.
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