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Thermoelastic assessment of plastic deformation

Quinn, S., Dulieu-Barton, J.M., Eaton-Evans, J., Fruehmann, R.K. and Tatum, P. (2008) Thermoelastic assessment of plastic deformation The Journal of Strain Analysis for Engineering Design, 43, (6), pp. 451-468. (doi:10.1243/03093247JSA377).

Record type: Article

Abstract

Thermoelastic stress analysis (TSA) is used to assess the effect of plastic deformation in small-diameter stainless steel pipework that has been subjected to multiple deformation cycles. In theory the residual stress resulting from the plastic deformation cannot be detected as the thermoelastic response is only a function of the stress change. However, it has been shown that plastic deformation may modify the thermoelastic constant in steel and aluminium. This change can be used to estimate the level of plastic strain that a component has experienced and has potential for TSA to be used as the basis for non-contact non-destructive full-field residual stress assessment. In this paper it is shown that strain hardening during the deformation process plays an important role in modifying the thermoelastic constant. X-ray computed tomography is used on the pipework to verify the estimates of geometry change that are used in determining the applied stress and estimating the residual stress levels. It is shown that TSA is not sensitive to residual stress; however, some interesting anomalies appear in the experimental results that provide a basis for discussion and open avenues of further work. Finally the non-adiabatic thermoelastic response is used to assess whether any damage has occurred in the pipework.

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More information

Published date: 2008
Keywords: thermoelastic stress analysis, plastic deformation, stainless steel pipework
Organisations: Fluid Structure Interactions Group, Engineering Sciences

Identifiers

Local EPrints ID: 55653
URI: http://eprints.soton.ac.uk/id/eprint/55653
ISSN: 0309-3247
PURE UUID: dfd20410-9188-4bcf-ae87-23fb16e865f1
ORCID for S. Quinn: ORCID iD orcid.org/0000-0002-9727-5080

Catalogue record

Date deposited: 04 Aug 2008
Last modified: 17 Jul 2017 14:32

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