TEMPERATURE BASED VALIDATION OF THE ANALYTICAL MODEL FOR THE ESTIMATION OF THE AMOUNT OF HEAT GENERATED DURING FRICTION STIR WELDING

Abstract

Friction stir welding is a solid-state welding technique that utilizes thermomechanical nfluence of the rotating welding tool on parent material resulting in monolith joint - weld. On the contact of welding tool and parent material, ignificant stirring and deformation of parent material appears, and during this rocess, mechanical energy is partially transformed into heat. Generated heat ffects the temperature of the welding tool and parent material, thus the proposed nalytical model for the estimation of the amount of generated heat can be erified by temperature: analytically determined heat is used for numerical stimation of the temperature of parent material and this temperature is ompared to the experimentally determined temperature. Numerical solution is stimated using the finite difference method - explicit scheme with adaptive grid, onsidering influence of temperature on material's conductivity, contact onditions between welding tool and parent material, material flow around elding tool, etc. The analytical model shows that 60-100% of mechanical power iven to the welding tool is transformed into heat, while the comparison of results hows the maximal relative difference between the analytical and experimental emperature of about 10%.

Keywords

Dates

  • Submission Date2012-02-09
  • Revision Date2012-04-02
  • Acceptance Date2012-04-18

DOI Reference

10.2298/TSCI120209173M

References

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