a. In a fibre-reinforced composite, what is the role of the matrix, the fibre and the fibre-matrix interface?

b. Explain briefly how the volume of fibre, fibre orientation, and fibre strength and modulus affect the properties of fibre-reinforced composites.

c. Explain why bonding between carbon fibres and an epoxy matrix should be strong, whereas bonding between silicon nitride fibres and a silicon carbide matrix should be weak .

d. 5 kg of continuous E-glass fibres are introduced in a unidirectional orientation into 6 kg of a Polypropylene (PP) matrix. The properties of glass fibre and Polypropylene matrix are given in the

Table Q2(d)

Calculate

1. the density of the composite,
2. the modulus of elasticity of composite parallel to the fibres, and
3. the tensile strength of composite parallel to the fibres.

Table Q2(d)

Material	Density (g/ccm)	Tensile strength (MPa)	E- Modulus (GPa)
Glass Fibre	2.6	2100	8.0
PP	1.21	42	3.6

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Material science The reinforcement of fiber upon a polymeric matrix improves the mechanical properties of the polymeric host Some of the advantages include high strength to weight ratio light weight a... View the full answer