National Physical Laboratory

Good practice guide for monitoring deformation and damage in fibre-reinforced plastics.

Broughton, W R, Gower, M R L, Lodeiro, M J, Shaw, R M
Measurement Good Practice Guide No. 123, 2012
NPL Doc. Ref:
PDB: 6366 | DDB: 5171
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Note: An asterisk after an author's name indicates a non-NPL author.


This Guide provides best practice guidance for in-situ monitoring of deformation (strain) and damage in fibre-reinforced plastics (FRPs). It covers static and cyclic fatigue loading conditions, and examines the effect of temperature and moisture on material response. Guidance is given on the use of contact and non-contact strain and damage measurement techniques, and data analysis and interpretation. It considers the application of strain gauges, linear variable displacement transducers (LVDTs), video extensometry, digital image correlation (DIC), optic fibres, electrical self-sensing and impact excitation. It also covers non-destructive evaluation (NDE) techniques, such as acoustic emission, ultrasonic C-scan, pulse thermography and X-radiography. The guide is primarily concerned with continuous carbon and glass fibre-reinforced laminated materials.

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