A new strategy for the numerical modeling of a weld pool |
| |
Authors: | Yassine Saadlaoui Éric Feulvarch Alexandre Delache Jean-Baptiste Leblond Jean-Michel Bergheau |
| |
Institution: | 1. Université de Lyon, ENISE, UJM, LTDS, UMR 5513 CNRS, 58, rue Jean-Parot, 42023 Saint-Étienne cedex 2, France;2. Université de Lyon, ENISE, LTDS, UMR 5513 CNRS, 58, rue Jean-Parot, 42023 Saint-Étienne cedex 2, France;3. LMFA UMR 5509 CNRS, site de Saint-Étienne, Université de Lyon, Université Jean-Monnet de Saint-Étienne, France;4. UPMC, Université Paris-6, UMR 7190, Institut Jean-Le-Rond-d''Alembert, Tour 65-55, 4, place Jussieu, 75252 Paris cedex 05, France |
| |
Abstract: | Welding processes involve high temperatures and metallurgical and mechanical consequences that must be controlled. For this purpose, numerical simulations have been developed to study the effects of the process on the final structure. During the welding process, the material undergoes thermal cycles that can generate different physical phenomena, like phase changes, microstructure changes and residual stresses and distortions. But the accurate simulation of transient temperature distributions in the part needs to carefully take account of the fluid flow in the weld pool. The aim of this paper is thus to propose a new approach for such a simulation taking account of surface tension effects (including both the “curvature effect” and the “Marangoni effect”), buoyancy forces and free surface motion.The proposed approach is validated by two numerical tests from the literature: a sloshing test and a plate subjected to a static heat source. Then, the effects of the fluid flow on temperature distributions are discussed in a hybrid laser/arc welding example. |
| |
Keywords: | Surface tension Free surface Finite-element method Welding process |
本文献已被 ScienceDirect 等数据库收录! |
|