Assessment of Non-Adiabatic Behaviour in Thermoelastic Stress Analysis of Small Scale Components |
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Authors: | W J Wang J M Dulieu-Barton Q Li |
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Institution: | (1) China National Accreditation Service for Conformity Assessment, Laboratory for Structural Strength Testing, Beijing Jiaotong University, Beijing, 100044, China;(2) School of Engineering Science, University of Southampton, Southampton, SO17 1BJ, UK;(3) Ministry of Education, Engjineering Research Center of Structure Reliability and Operation Measurement Technology of Rail, Guided Vehicles Beijing Jiaotong University, Beijing, China |
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Abstract: | The classical thermoelastic equation and the generalized heat conduction equation are developed to deal with a non-adiabatic
response in thermoelastic stress analysis. A FE simulation procedure is set up to solve the heat conduction equation over
a range of loading frequencies. A small disc (20 mm diameter) loaded under three-point diametric compression is used to examine
the effect of in-plane heat conduction. As the disc has regions of zero, moderate and high stress gradients it is an ideal
component for this analysis. A regime is developed that provides a basis for an assessment of the nature of the response and
allows a minimum loading frequency to be identified so that adiabatic behaviour is obtained. This validity of this approach
is demonstrated on steel disc of 20 mm diameter. A special loading device has been designed to obtain the three-point loading
and a recently introduced Instron Electropuls test machine is used to achieve the high levels of cyclic loading required for
the adiabatic conditions. |
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