Three-Dimensional Simulation of Transient GMA Weld Pool with Free Surface
نویسندگان
چکیده
-S 169 WELDING JOURNAL ABSTRACT. A 3-D transient numerical model was developed for simulation of gas metal arc (GMA) weld pools with free surface and droplet impact effects. This effort predicted a moving GMA weld pool by considering not only the heat transfer and fluid flow driven by surface tension gradient, electromagnetic force, buoyancy, and arc pressure, but also detailed information about droplet flow effects on a weld pool, its solidification, and weld bead shape. Due to its unique capacity in simulation of free surface, this model can be applied to various welded joints. In the present study, the model was used to simulate both beadon-plate and T-joints with different welding positions. The simulated weld bead geometries were in good agreement with experimental measurements.
منابع مشابه
Three-Dimensional Modeling of Gas Metal Arc Welding of Aluminum Alloys
A three-dimensional mathematical model and numerical techniques were developed for simulating a moving gas metal arc welding process. The model is used to calculate the transient distributions of temperature and velocity in the weld pool and the dynamic shape of the weld pool for aluminum alloy 6005-T4. Corresponding experiments were conducted and in good agreement with modeling predictions. Th...
متن کاملTHREE DIMENSIONAL MODELING OF TURBULENT FLOW WITH FREE SURFACE IN MOLD FILLING
In the present study a Finite Difference Method has been developed to model the transient incompressible turbulent free surface fluid flow. A single fluid has been selected for modeling of mold filling and The SOLA VOF 3D technique was modified to increase the accuracy of simulation of filling phenomena for shape castings. For modeling the turbulence phenomena k-e standard model was used. In or...
متن کاملThree-dimensional Reconstruction of Specular Surface for Gas Tungsten Arc Weld Pool
Observing the weld pool and measuring its geometrical parameters is a key issue for developing the next generation intelligent welding machine and modeling complex welding process. In the past few years, different techniques have been applied, but the dynamic specular weld pool surface and the strong weld arc complicate these approaches and make the observation difficult. To resolve the problem...
متن کاملThree-dimensional reconstruction of specular surface for a gas tungsten arc weld pool
Observing the weld pool and measuring its geometrical parameters are key issues for developing the next generation intelligent welding machine and modeling the complex welding process. In the past few years, different techniques have been applied, but the dynamic specular weld pool surface and the strong weld arc complicate these approaches and make observation difficult. To resolve the problem...
متن کاملError Analysis of a Three-Dimensional GTA Weld Pool Surface Measurement System
Measurement of weld pool surface is an important research area in the welding community. In recent years, many vision-based approaches have been proposed that have achieved certain successes in this area. However, the accuracy of the measurement results in these systems deserves further consideration since the shape information of small weld pool surface may be used to validate welding models a...
متن کامل