Sy. Lee et Sj. Na, A NUMERICAL-ANALYSIS OF A STATIONARY GAS TUNGSTEN WELDING ARC CONSIDERING VARIOUS ELECTRODE ANGLES, Welding journal, 75(9), 1996, pp. 269-279
The influences of parameters such as electrode angle, welding current
and are length on the gas tungsten are welding process using Ar shield
ing gas were studied assuming the current density distribution along t
he cathode surface. Its distribution was assumed to have a Gaussian fo
rm, which is characterized by the maximum current density at the elect
rode tip or the distribution parameter. For determining these two valu
es according to the electrode angle and welding current, the temperatu
re distributions of a 60-deg angle electrode were calculated for 100,
200 and 300 A welding currents and compared with the experimental meas
urements obtained by previous research. Using these assumed current de
nsity distributions as the boundary condition for the current continui
ty equation, the heat flux and current density on the base plate were
calculated for various influencing parameters and compared with the ex
perimental results obtained under the same welding conditions. Further
more, other transporting phenomena acting on the anode plate, such as
are pressure and shear stress, were calculated.