Computer simulation of upset welding
Useful process modeling of upset welding requires contributions from metallurgy, welding engineering, thermal analysis and experimental mechanics. In this report, the significant milestones for such an effort are outlined and probable difficult areas are pointed out. Progress to date is summarized and directions for future research are offered. With regard to the computational aspects of this problem, a 2-D heat conduction computer code has been modified to incorporate electrical heating, and computations have been run for an axisymmetric problem with simple viscous material laws and d.c. electrical boundary conditions. In the experimental endeavor, the boundary conditions have been measured during the welding process, although interpretation of voltage drop measurements is not straightforward. The ranges of strain, strain rate and temperature encountered during upset welding have been measured or calculated, and the need for a unifying constitutive law is described. Finally, the possible complications of microstructure and interfaces are clarified.
- Research Organization:
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5229058
- Report Number(s):
- SAND-82-8663; ON: DE82014184
- Country of Publication:
- United States
- Language:
- English
Similar Records
Temperature and Material Flow Prediction in Friction-Stir Spot Welding of Advanced High-Strength Steel
CHARACTERIZATION OF DEFECTS IN ALLOY 152, 52 AND 52M WELDS