1. Introduction
Glass Fiber Reinforced Polymers (GFRPs) is a fiber reinforced
polymer made of a plastic matrix reinforced by fine fibers of glass.
Fiber glass is a lightweight, strong, and robust material used in different
industries due to their excellent properties. Although
strength properties are somewhat lower than carbon fiber and it
is less stiff, the material is typically far less brittle, and the raw
materials are much less expensive [1]. Its bulk strength and weight
properties are very favorable when compared to metals, and it can
be easily formed using molding processes [2]. Now a days natural
fibers such as sisal and jute fiber composite materials are replacing
the glass and carbon fibers owing to their easy availability and cost
[3]. The use of natural fibers is improved remarkably due to the fact
that the field of application is improved day by day especially in
automotive industries. Several researches have been taken place
in this direction. Silva et al. [4] have developed the natural
fibers/castor oil polyurethane composites and tested the fracture
toughness. They have achieved the best fracture toughness performance
for sisal fiber composites. The thermophysical properties of
natural fiber reinforced polyester composites is carried out by