ISSN: 2265-6294

ASSESSMENT OF INTERNAL STRESSES IN ALUMINA-MILD STEEL WELDED TUBES USING FINITE ELEMENT ANALYSIS

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Devarayi Ashok, Kolipaka Srinivasu, Palaparthi Ravi Kumar, T.Ravi Teja

Abstract

In this paper to Evaluation of mechanical and interfacial properties of friction welded alumina-mild steel rods with the use of Al6061 sheet are presented in this work. The bonds were attained through interfacial interlocking and intermetallic phase formation with average bending strengths in the range of 40 to 200 MPa and insignificant hardness change in the parent alumina and mild steel. A preliminary simulation was made to predict the deformation, stress, strain and temperature distribution during the joining operation using a fully coupled thermo-mechanical FE model. The aluminum alloy metal being rubbed was simulated using a phenomenological Johnson-Cook viscoelasticity material model, which suited for materials subjected to large strains, high strain rates and high temperatures. The highest stress, strain and deformation are found to be within the heat affected zone of the weld close to the periphery rubbing surface region and correspond to the highest temperature profiles observed

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