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Assessment of non-adiabatic behaviour in thermoelastic stress analysis of small scale components

By W.J. Wang, J. M. Dulieu-Barton and Q. Li

Abstract

The classical thermoelastic equation and the<br/>generalized heat conduction equation are developed to deal<br/>with a non-adiabatic response in thermoelastic stress<br/>analysis. A FE simulation procedure is set up to solve the<br/>heat conduction equation over a range of loading frequencies.<br/>A small disc (20 mm diameter) loaded under threepoint<br/>diametric compression is used to examine the effect<br/>of in-plane heat conduction. As the disc has regions of zero,<br/>moderate and high stress gradients it is an ideal component<br/>for this analysis. A regime is developed that provides a<br/>basis for an assessment of the nature of the response and<br/>allows a minimum loading frequency to be identified so<br/>that adiabatic behaviour is obtained. This validity of this<br/>approach is demonstrated on steel disc of 20 mm diameter.<br/>A special loading device has been designed to obtain the<br/>three-point loading and a recently introduced Instron Electropuls test machine is used to achieve the high levels<br/>of cyclic loading required for the adiabatic conditions

Topics: TJ
Year: 2010
OAI identifier: oai:eprints.soton.ac.uk:68669
Provided by: e-Prints Soton
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