i. Calculate the tensile modulus of elasticity of a unidirectional Kevlar-49 fibers epoxy composite material that contains 63% by volume of Kevlar 49 fibers and is stressed under isostrain conditions. The Kevlar 49 fibers have a tensile modulus of elasticity of 189.8 GPa and the epoxy matrix a tensile modulus of elasticity of 3.8 GPa. ii. If the tensile strength of the Kevlar 49 fibers is 3.8 GPa and that of the epoxy resin is 75.9 MPa, calculate the tensile strength of the composite material in Q3b(i). Calculate the fraction of load carried by the Kevlar 49.

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A:

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A: *Answered and explained already above.

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Processing of Polymer Matrix Composites

The polymer matrix composite is described as a composite material that contains some polymer in the form of either fibers or powder. Polymer matrix composites are also known in short as PMC's.