For my study, i have increased glass weight percentage in GFRP composites. Also, It increased strength of the composites.
There is a balancing act here. In general terms increasing the fiber content will increase the stiffness and strength but if you go too far then you will have manufacturing issues and the strength will decrease. Software like Digimat allows you to vary the VF and see the influence on properties.
Dear Manjunath,
a higher fibre weight fraction increases both strength and stiffness of the composite, given the fibres are fully impregnated (for laminated composites: up to the maximum technically feasible threshold of about 60%) i.e. the interface guarantees a good load-transfer. Attached please find a data sheet of Epoxy/S-Glass prepregs with dissimilar weight fractions showing the improved properties with increased fibre weight fraction.
increasing the fiber content will increase the stiffness and strength and you can predict it using the rule of mixture for composites:
EC= EF VF + EM VM , also ( VM + VF ) = 1 or VM = (1 - VF )
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