Title: A validated thermo mechanical FEM model of bead-on-plate welding
Authors: Djarot B. Darmadi; Anh Kiet-Tieu; John Norrish
Addresses: Department of Mechanical Engineering, Brawijaya University, Malang, Jawa Timur 65145, Indonesia ' Department of Mechanical Engineering, University of Wollongong, Wollongong, NSW 2500, Australia ' Department of Mechanical Engineering, University of Wollongong, Wollongong, NSW 2500, Australia
Abstract: This paper is presenting accurate FEM model of bead-on-plate welds of 316L stainless steels through thermo-mechanical analysis. The model was composed using ANSYS Parametric Design Language (APDL) program. In thermal analysis, mixed mode of volumetric thermal load was used to represent moving heat source. Growing weld bead was accommodated in both the thermal and mechanical models using birth and death technique. Melting phenomenon was modelled by low stiffness and zero plastic strain of melting elements. Results from thermal analysis and subsequent mechanical analysis have been validated. Good agreements of predicted temperature histories, temperature field and residual stress with experimental results confirmed the accuracy of the proposed FEM model.
Keywords: FEM; finite element method; modelling; mixed mode thermal loads; residual stress; thermomechanical analysis; bead-on-plate welding; temperature histories; temperature field; residual stress.
DOI: 10.1504/IJMPT.2014.059047
International Journal of Materials and Product Technology, 2014 Vol.48 No.1/2/3/4, pp.146 - 166
Received: 04 Feb 2013
Accepted: 13 Oct 2013
Published online: 30 May 2014 *