Question

Calculate the stress in fibres that will cause fracture

Answer 1

The random arrangement of glass fibres in resin matrices produces composite materials which have planar isotropy and are of great importance to many structural and engineering applications. Random fibre composites offer a good combination of mechanical properties and are thus extensively used in various industries. This study deals with the characterisation of strength and fracture behaviour of random glass fibre-reinforced polyester composites. The concepts of Linear Elastic Fracture Mechanics (LEFM) have been applied to these composites to obtain meaningful toughness parameters. It is shown that a substantial amount of slow crack growth occurs prior to unstable fracture and thus the total fracture behaviour of the material should be studied by applying the concepts of Crack Growth Resistance Curves (R-Curves). 


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