Thermomechanical modeling of residual strains and stresses in a GTAW process
- General Electric Co., Schenectady, NY (United States)
- Univ. of Illinois, Urbana, IL (United States). Dept. of Mechanical and Industrial Engineering
A three-dimensional thermomechanical model was developed and the transient analysis was carried out for the autogenous Gas Tungsten Arc Welding (GTAW) process using the finite element method. Because the heat generated due to the plastic deformation in the welding process is negligible in comparison with the heat from the arc, the thermomechanical analysis is carried out in two parts. The first part performs a three-dimensional uncoupled transient heat transfer analysis and computes the thermal history of the entire weldment. The second part then uses the results of the first part and performs a three-dimensional transient thermoelasto-plastic analysis in order to compute the distortions, strains and stresses in the weld. Mild steel looses its strength almost completely in the molten state and therefore, a cut-off temperature of melting point (1,755 K) is used for the computation of transient and residual strains and stresses.
- OSTI ID:
- 462611
- Report Number(s):
- CONF-950828-; ISBN 0-7918-1705-9; TRN: IM9719%%81
- Resource Relation:
- Conference: 1995 National heat transfer conference, Portland, OR (United States), 5-9 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of 1995 national heat transfer conference: Proceedings. Volume 4: Transport phenomena in manufacturing and materials processing; Transport phenomena in materials joining processes; Transport phenomena in net shape manufacturing; HTD-Volume 306; Mahajan, R.L. [ed.] [Univ. of Colorado, Boulder, CO (United States)]; PB: 261 p.
- Country of Publication:
- United States
- Language:
- English
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