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

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter2: Axially Loaded Members

Section: Chapter Questions

Problem 2.2.7P: Rigid bar ACB is supported by an elastic circular strut DC having an outer diameter of 15 in. and...

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