The stress-strain profiles in the figure were obtained following longitudinal tensile loading for a brittle polymer, glass fibre, and a composite lamina consisting of unidirectional continuous glass fibres and the polymer matrix. Assume that the matrix is free of voids, there is perfect bonding between glass fibres and the matrix, and there are no residual stresses in the composite lamina.
Identify the correct stress-strain profile for the polymer matrix, glass fibre, and their composite lamina from the above figure.
- $\mathrm{P}$ - Matrix ; $\mathrm{Q}$ - Glass Fibre ; $\mathrm{R}$ - Composite
- $\mathrm{P}$ - Glass fibre ; $\mathrm{Q}$ - Composite ; $\mathrm{R}$ - Matrix
- $\mathrm{P}$ - Glass fibre ; $\mathrm{Q}$ - Matrix ; $\mathrm{R}$ - Composite
- $\mathrm{P}$ - Composite ; $\mathrm{Q}$ - Glass fibre ; $\mathrm{R}$ - Matrix
