Elastic-plastic contact conditions for frictionally constrained bodies under cyclic tangential loading

Chaudhry, V and Kailas, Satish V (2014) Elastic-plastic contact conditions for frictionally constrained bodies under cyclic tangential loading. In: Journal of Tribology - Transactions of the ASME, 136 (1). 011401_1-011401_17.

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Abstract

A Frictionally constrained condition implies dependence of friction force on tangential displacement amplitude. The condition may occur due to chemical, physical, and/or mechanical interaction between the contacting surfaces. The condition, sometimes also referred to as the presliding condition or partial slip condition, is characterized under fretting. Under such conditions, various experimental studies indicate the existence of two distinguishable regions, that is, stick region and slip region. In the present study, frictionally constrained conditions are identified and the evolutions of stick-slip regions are investigated in detail. Investigations have been performed on self-mated stainless steel and chromium carbide coated surfaces mated against stainless steel, under both vacuum and ambient conditions. Contact conditions prevailing at the contact interface were identified based on the mechanical responses and were correlated with the surface damage observed. Surface degradation has been observed in the form of microcracks and material transfer. Detailed numerical analysis has also been performed in order to understand the energy dissipation and the damage mode involved in the surface or subsurface damage. It has been observed that under frictionally constrained conditions, the occurrence of annular slip features are mainly due to the junction growth, resulting from elastic-plastic deformation at the contact interface. Ratcheting has been observed as the governing damage mode under cyclic tangential loading condition.

Item Type:	Journal Article
Publication:	Journal of Tribology - Transactions of the ASME
Publisher:	American Society of Mechanical Engineers
Additional Information:	Copyright of this article belongs to American Society of Mechanical Engineers.
Keywords:	Presliding; Stick-Slip; Energy Dissipation; Material Transfer; Ratcheting
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	17 Jan 2014 06:56
Last Modified:	17 Jan 2014 06:56
URI:	http://eprints.iisc.ac.in/id/eprint/48095

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