A composite has 20 vol% fibres with Ef = 150 GPa in a matrix Em = 30 GPa. If subjected to load parallel to the fibre direction, the fibre would fail first when the stress of fibre reaches 22.5 GPa. %3D Note the composite stress is expressed as ɑ = V,o, + (1-Vf) amf1- The matrix would fail later at a failure strain of 0.4, where the composite stress is expressed as o, = (1 – V,)amr- Assume both the matrix and the fibres deform elastically and subsequently underge prittle fracture. What would be the maximum stress the composite can withstand? O 8.1 GPa O4.5 GPa 12 GPa O 22.5 GPa 9.6 GPa

A composite has 20 vol% fibres with Ef = 150 GPa in a matrix Em = 30 GPa. If subjected to load parallel to the fibre direction, the fibre would fail first when the stress of fibre reaches 22.5 GPa. %3D Note the composite stress is expressed as ɑ = V,o, + (1-Vf) amf1- The matrix would fail later at a failure strain of 0.4, where the composite stress is expressed as o, = (1 – V,)amr- Assume both the matrix and the fibres deform elastically and subsequently underge prittle fracture. What would be the maximum stress the composite can withstand? O 8.1 GPa O4.5 GPa 12 GPa O 22.5 GPa 9.6 GPa

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

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.

Question

A composite has 20 vol% fibres with Ef = 150 GPa in a matrix Em = 30 GPa. If
subjected to load parallel to the fibre direction, the fibre would fail first when the
stress of fibre reaches 22.5 GPa.
Note the composite stress is expressed as o̟ = Vf0s, + (1-Vf) omfı.
The matrix would fail later at a failure strain of 0.4, where the composite stress is
expressed as a, = (1 – V;)ơm-
Assume both the matrix and the fibres deform elastically and subsequently undergo
brittle fracture. What would be the maximum stress the composite can withstand?
8.1 GPa
4.5 GPa
12 GPa
22.5 GPa
9.6 GPa

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