Analysis of buckling distortion in bead-on-plate Ti 6-4 welds
- Sandia National Labs., Livermore, CA (United States)
- Sandia National Labs., Albuquerque, NM (United States)
- United Technologies Research Center, East Hartford, CT (United States)
Three-dimensional thermal-mechanical analyses of autogenous GTA bead-on-plate welds of Ti 6AI-4V have been performed. Sequential coupling of the thermal and mechanical analyses was employed. Predicted time-dependent temperature distributions from the thermal analysis code, JACQ3D, were provided as input to ATAQUS for the mechanical analysis. The heat input to the workpiece is modeled as a traveling Gaussian heat flux distribution. Thermal losses from the workpiece due to convection, radiation, and metal evaporation are included in the analysis. The material model is a bilinear temperature-dependent elastic-plastic model. The buckling distortion observed in the post-weld workpiece was successfully modeled using shell finite elements. A complete set of experimental data was obtained in this study to validate the numerical model. Computed thermal results compared favorably with measured temperatures (thermocouples and infrared thermography) and fusion zone shape. Real-time displacement data obtained from video cameras agreed well with predicted mechanical results. In particular, the initiation of buckling, which was observed in the displacement data, was captured in the simulation.
- Research Organization:
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 81083
- Report Number(s):
- SAND-95-8534C; CONF-9509118-4; ON: DE95010763
- Resource Relation:
- Conference: 7. Conference on modeling of casting, welding and advanced solidification processes, London (United Kingdom), 10-15 Sep 1995; Other Information: PBD: [1995]
- Country of Publication:
- United States
- Language:
- English
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