Maxwell, A S; Broughton, W R; Lodeiro, M J (2006) Review of techniques for the characterisation of residual stress in polymer composites. NPL Report. DEPC-MPR 056

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Abstract

Residual stresses are tensile or compressive stresses that exist in materials without an external load being applied to the component. Their presence in a component can be detrimental to both the performance of a material and the life expectancy of the component. Residual stresses are significantly more difficult to measure than the applied stresses. For this reason, designers and engineers are often forced into using higher safety factors that leads to both overdesign of structures and increased weight. The level of residual stress present in composites is particularly large due to the mismatch in the mechanical properties of the reinforcement and the matrix that forms the composite structure. For this reason it is essential to have techniques that can predict the residual stresses that are present in composite structures. This report reviews the different techniques that can be used to measure residual stresses in composites and the models that have been developed to predict their distribution.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	DEPC-MPR 056
Keywords:	test methods
Subjects:	Advanced Materials Advanced Materials > Polymers
Last Modified:	02 Feb 2018 13:15
URI:	http://eprintspublications.npl.co.uk/id/eprint/3757

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