Residual stress measurement by means of the thermoelastic effect

Article metrics

Abstract

The term thermoelastic effect refers to the coupling between mechanical deformation and the change in thermal energy of an elastic material. The first theoretical treatment of this phenomenon is attributed to Lord Kelvin1, and the resulting law states that the rate of change in temperature of a dynamically loaded body is directly related to the rate of change of the principal stress sum under adiabatic conditions. Although Kelvin's law has been well known for over a century, it is only in the past ten years that the thermoelastic effect has been exploited as a means for dynamic stress analysis. A system known as SPATE (stress pattern analysis by measurement of thermal emission) has been developed which can detect changes in infrared emission due to minute changes in the temperature of a dynamically stressed material. Recently it was discovered that the SPATE response or, more generally, the thermal response of a cyclically loaded body is not only a function of the dynamic part of the stress, but also of the static component2. This finding has led to the suggestion that residual stresses within a material might be detected using this phenomenon, and here we present the first demonstration of such a means of residual stress measurement.

Access options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1

    Thompson, W. (Lord Kelvin) Trans. R. Soc. Edinb. 20, 261–288 (1853).

  2. 2

    Machin, A. S., Sparrow, J. G. & Stimson, M.-G. Strain 23, 27–30 (1987).

  3. 3

    Wong, A. K., Jones, R. & Sparrow, J. G. J. Phys. Chem. Solids 48, 749–753 (1987).

  4. 4

    Wong, A. K., Sparrow, J. G. & Dunn, S. A. J. Phys. Chem. Solids (in the press).

  5. 5

    Fisher, M. J. & Herrmann, G. Rev. Progr. Quant. NDE 3B 1283–1291 (1984).

  6. 6

    Hirao, M. & Pao, Y.-H. J. Acoust. Soc. Am. 77, 1659–1664 (1985).

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Wong, A., Dunn, S. & Sparrow, J. Residual stress measurement by means of the thermoelastic effect. Nature 332, 613–615 (1988) doi:10.1038/332613a0

Download citation

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.