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The determination of thermal residual stresses in unidirectional and cross-ply titanium matrix composites using an etch removal method

Watt, Gerald, Crocombe, Andrew, Ogin, Stephen and Kyle-Henney, Stephen (2017) The determination of thermal residual stresses in unidirectional and cross-ply titanium matrix composites using an etch removal method JOURNAL OF COMPOSITE MATERIALS.

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Abstract

Recent work has shown that a simple rule-of-mixtures approach may be used to predict the stress strain behaviour of a cross-ply metal matrix composite (MMC) laminate. However, the low-strain behaviour was not predicted accurately, probably because thermal residual stresses are obviously not included in such an approach. To increase the understanding of the limitations of the rule-of-mixtures approach for predicting the stress-strain response, the residual strain-state of the fibre reinforcement has been determined using an etching technique (henceforth referred to as the ‘total etch removal method’), and results have been compared both with finite element modelling and with thermal residual strain measurements derived from stress-strain curves. The results show that the residual strain distribution in a cross-ply composite may be more complex than previously thought, with the fibres in internal 00 plies having considerably higher thermal residual strains than fibres in external plies. The results confirm that the rule-of-mixtures approximation can be used, with some reservations with regard to the low strain behaviour.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Watt, Geraldg.watt@surrey.ac.ukUNSPECIFIED
Crocombe, AndrewA.Crocombe@surrey.ac.ukUNSPECIFIED
Ogin, StephenS.Ogin@surrey.ac.ukUNSPECIFIED
Kyle-Henney, StephenUNSPECIFIEDUNSPECIFIED
Date : 30 September 2017
Copyright Disclaimer : Copyright 2017 Sage Publications Ltd. This is the author's version of an article accepted for publication in JOURNAL OF COMPOSITE MATERIALS, after peer-review. The version of record will be available at: https://uk.sagepub.com/en-gb/eur/journal/journal-composite-materials
Uncontrolled Keywords : Metal matrix composites (MMCs), Residual stress, Finite element analysis (FEA), Micro-mechanics.
Depositing User : Melanie Hughes
Date Deposited : 30 Jun 2017 15:58
Last Modified : 30 Jun 2017 16:01
URI: http://epubs.surrey.ac.uk/id/eprint/841540

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