Dissipative Behaviour of Metallic Materials in Low Stress Cyclic Loading

Abstract:

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In order to fully understand the thermomechanical phenomena involved in high-cycle fatigue, a method for determining the dissipative thermal sources in a loaded metallic specimen from the spatio-temporal integration of the heat diffusion equation is proposed. Temperature fields obtained through a focal array infra-red camera are processed with this technique. After a refined analysis of the sensitivity of the method, preliminary tests have shown that it is possible to detect a burst of heat sources within the first couple of cycles for the specimen tested above a certain level of tensile stress. This behaviour is thought to be related to the microplasticity level.

Info:

Periodical:

Edited by:

J.M. Dulieu-Barton and S. Quinn

Pages:

253-258

DOI:

10.4028/www.scientific.net/AMM.3-4.253

Citation:

F. Maquin and F. Pierron, "Dissipative Behaviour of Metallic Materials in Low Stress Cyclic Loading", Applied Mechanics and Materials, Vols. 3-4, pp. 253-258, 2005

Online since:

August 2006

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$35.00

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