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Prediction of residual stress using explicit finite element method

Siswanto, Waluyo Adi and Nagentrau, M. and Mohd Tobi, Abdul Latif (2015) Prediction of residual stress using explicit finite element method. Journal of Mechanical Engineering and Sciences (JMES), 9 (Dec). pp. 1556-1570. ISSN 2289-4659

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Abstract

This paper presents the residual stress behaviour under various values of friction coefficients and scratching displacement amplitudes. The investigation is based on numerical solution using explicit finite element method in quasi-static condition. Two different aeroengine materials, i.e. Super CMV (Cr-Mo-V) and Titanium alloys (Ti-6Al- 4V), are examined. The usage of FEM analysis in plate under normal contact is validated with Hertzian theoretical solution in terms of contact pressure distributions. The residual stress distributions along with normal and shear stresses on elastic and plastic regimes of the materials are studied for a simple cylinder-on-flat contact configuration model subjected to normal loading, scratching and followed by unloading. The investigated friction coefficients are 0.3, 0.6 and 0.9, while scratching displacement amplitudes are 0.05 mm, 0.10 mm and 0.20 mm respectively. It is found that friction coefficient of 0.6 results in higher residual stress for both materials. Meanwhile, the predicted residual stress is proportional to the scratching displacement amplitude, higher displacement amplitude, resulting in higher residual stress. It is found that less residual stress is predicted on Super CMV material compared to Ti-6Al-4V material because of its high yield stress and ultimate strength. Super CMV material with friction coefficient of 0.3 and scratching displacement amplitude of 0.10 mm is recommended to be used in contact engineering applications due to its minimum possibility of fatigue.

Item Type: Article
Uncontrolled Keywords: friction coefficient; sliding amplitude; cylinder-on-flat; Ti-6Al-4V; super CMV
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TJ Mechanical engineering and machinery > TJ170-179 Mechanics applied to machinery. Dynamics
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Engineering Mechanics
Depositing User: A/Prof. Dr. Waluyo Adi Siswanto
Date Deposited: 01 Mar 2016 06:58
Last Modified: 01 Mar 2016 06:58
URI: http://eprints.uthm.edu.my/id/eprint/7732
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