|
Abstract: A
3-D transient numerical model for TIG welding stainless steel has been
developed to simulate full-penetrated weld pool dynamic behavior. It has
been found that when the double-elliptic distribution modes of both heat
flux and arc pressure are employed in the numerical simulation of weld
pool geometry and surface deformation for moving TIG welding, the
calculated results agree much better with the experimental measurements,
compared with the predicted ones when Gaussian distribution modes are
used. The dynamic development of deformation at top and bottom surfaces
of weld pool is demonstrated, and the difference between the stationary
TIG welding and moving TIG welding is analyzed. It provides theoretical
basis and experimental data for precise modeling and intelligent control
of moving TIG welding.
Key words: Double-elliptic distribution mode
Weld pool geometry Surface deformation
Numerical simulation
CLC No: TG44
国家教育部科学技术研究重点资助项目(104109). Received 20051027, received in revised form 20060610
|