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REsidual Stress And Structural Integrity Studies Using Thermography


Residual Stress (RS) is attracting considerable attention in engineering because of its impact on part distortion, service performance, and the costs associated with failures resulting from RS.

Currently, RS assessment can be expensive, time-consuming, destructive, and may provide only single-point data.

In this project, a new means of evaluating RS is proposed based on material and system models combined with data from a full-field, non-contact, non-destructive measurement technique.

This approach will be particularly suited to large or expensive components, where material removal is undesirable and where contact is impossible. The objectives are to develop:

a) A physical understanding of, and a theoretical framework for, RS evaluation by thermoelasticity.

b) Material models for calibration of thermoelastic data and system models for the determination of RS.

c) Demonstrators for RS evaluation including its industrial application and validation.


University of Southampton

The National Physical Laboratory (NPL)



AMEC Foster Wheeler

Funding Body

Innovated UK: Collaborative Research and Development Competition: Developing the civil nuclear power supply chain (


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