Analytical so ution for a new hybrid double-ellipsoidal heat source in semi-infinite body

摘要

Weld pool simu lation plays a significant role in thermal stress analysis, residual stress calculation as well as microstructure modeling of welded joints and structures. This paper aims to describe the analytical solution for a new hybrid double-ellipsoidal power density moving heat source in semi-infinite body & its application in weld pool simulation. The solution has been obtained by superimposing he solutions for various parts of the proposed hybrid double-ellipsolidal heat source. The weld pool geometry subjected to various heat source parameters has been calculated and compared with results predicted by the double ellipsoidal heat source and available experimental data. Very good agreement between the predicted weld pool geometry and the measured ones has been obtained. The results also show that the hybrid heat source could give an improved prediction of weld pool depth in comparison with the earlier double ellipsoidal heat source.