Title: Numerical and experimental analysis of the residual stresses in welding processes

Authors: C.E. Majorana, G. Navarro, B.A. Schrefler

Addresses: Dept. of Civil Engineering, University of Padova, Italy. ' Dept. of Mechanical Engineering, University of Padova, Italy. ' Dept. of Civil Engineering, University of Padova, Italy

Abstract: A numerical procedure is presented for the time-transient analysis of the thermomechanical phenomena occurring during steel welding processes and of the residual stresses. For this purpose, at each time step the temperature field is calculated taking into account temperature-dependent thermal properties; then for subintervals of each time step elastoplastic analyses are carried out considering again temperature-dependent mechanical properties. The thermal load is simulated using a procedure based on Gaussian heat source surfaces. The time integration of the non-linear equation of heat transport is carried out using a three-level scheme, with variable step sizes. A numerical example of practical interest is shown, for which experimental data are available.

Keywords: thermomechanical analysis; steel welding; residual stresses; finite element method; FEM; thermal properties; Gaussian heat source surface; heat transport; elastoplastic analyses.

DOI: 10.1504/IJCAT.1988.062672

International Journal of Computer Applications in Technology, 1988 Vol.1 No.1/2, pp.96 - 104

Published online: 11 Jun 2014 *

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