Residual Stresses in As-Welded Joints: Finite Element Modeling and Neutron Difraction Stress Measurements

Abstract:

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This paper describes the numerical analysis method used to estimate welding induced residual stresses in K-shape tubular bridge joints. The knowledge of residual stress distribution is required to design the geometry of K-joints loaded under fatigue stresses. Numerical simulations are focused on the arc welding MAG process, generally used to weld joints in bridge construction. Thermo-mechanical analyses are performed in 3D using two finite element codes:ABAQUS® and MORFEO® . ABAQUS has the advantage to offer large analysis capabilities(nonlinear, transient, dynamic, etc.) whereas MORFEO is more dedicated to welding processes and offers the possibility to analyze crack propagation under fatigue loads. Computed residual stresses in the region surrounding the weld are compared with measured residual stresses in order to estimate the ability of the codes to reproduce these stresses. Position, orientation and magnitude of the highest residual stress components are discussed.

Info:

Periodical:

Key Engineering Materials (Volumes 488-489)

Edited by:

Z. Tonković and M.H. Aliabadi

Pages:

335-338

DOI:

10.4028/www.scientific.net/KEM.488-489.335

Citation:

C. Acevedo et al., "Residual Stresses in As-Welded Joints: Finite Element Modeling and Neutron Difraction Stress Measurements", Key Engineering Materials, Vols. 488-489, pp. 335-338, 2012

Online since:

September 2011

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Price:

$35.00

[1] T.R. Gurney: Fatigue of Welded Structures. Cambridge University Press (1979).

[2] K. Masubuchi: Analysis of welded structures. Pergamon Press (1980).

[3] P. Dong and J.K. Hong: Recommendations for determining residual stresses in fitness-for-service assessment. Welding Research Council Bulletin Vol. 476 (2002).

[4] V.J. Papazoglou and K. Masubuchi: J. Press. Vess. -T. ASME Vol. 83-87 (1982), p.119.

[5] J. Goldak, A. Chakravarti and M. Bibby: Metall. Trans. B Vol. 15B Numb. 2 (1984), p.299.

[6] L.O. Raymond and J. Chipman: Trans. Met. Soc. AIME Vol. 239 (1967), p.630.

[7] L. -E. Lindgren: J. Therm. Stresses 24 (2001), p.141.

[8] P. Michaleris. Courses at the Pennsylvania State University (2011).

[9] ABAQUS: Analysis user's manual version 6. 9 (Dassault Systèmes, 2009).

[10] MORFEO: v1. 3 user manual (Cenaero, 2009).

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