Optimised modelling of weld metal constitutive behaviour in the net TG4 international weld simulation and measurement benchmark
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Date
2012-07-15
Journal Title
Journal ISSN
Volume Title
Publisher
ASME International
Abstract
The NeT TG4 benchmark specimen consists of a three pass type 316L TIG slot weld in a AISI type 316L plate. Phase one of the finite element simulation round robin performed on TG4 by the NeT network made the assumption that the weld metal exhibits the same mechanical behaviour as parent material. A comprehensive series of material characterisation tests on weld metal has now been completed, and these have allowed the derivation of a number of mixed isotropic-kinematic material models specifically for weld metal. The derived models have been used to improve the predicted stresses in the TG4 benchmark specimen. This paper first reviews the weld metal materials testing programme, and then discusses the optimum material hardening model fitting strategy to use for austenitic weld metal. The derived material models are tested by using them to predict residual stresses in the TG4 benchmark, and validating the predictions against the extensive database of measured residual stresses, and distortions. © 2012 by ASME
Description
Keywords
Materials, Fabrication, Metals, Simulation, Residual stresses, Data, Finite element method, Hardening, Particle kinematics, Stresses, Materials testing
Citation
Smith, M. C., Muránsky, O, Austin, C, Bendeich, P.J., & Edwards, L. (2012). Optimised modelling of weld metal constitutive behaviour in the net TG4 international weld simulation and measurement benchmark. Paper presented to the ASME 2012 Pressure Vessels and Piping Conference July 15–19, 2012 Toronto, Ontario, Canada. In Proceedings of the ASME 2012 Pressure Vessels and Piping Conference. Volume 6: Materials and Fabrication, Parts A and B. Toronto, Ontario, Canada. July 15–19, 2012, (pp. 1125-1137). ASME. doi:10.1115/PVP2012-78405