The Paton Welding Journal, 2008, №06

2008 №06 (03)

2008 №06 (05)

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The Paton Welding Journal, 2008, #6, 19-24 pages

Modeling of residual stresses in laser welding

A. Bokota, W. Piekarska

Politechnika Czestochowska, Czestochowa, Poland.

Abstract
Mathematical model and calculation of strains and stresses, occurring in laser welding of a steel sheet, are presented. For determination of the temperature field equation of heat conductivity with a convective term is used, solved by the method of Green function. Model of phase transformations is based on the diagram of continuous cooling of welded steel in Avrami, Koistinen and Marburger equations. When determining temporal and residual stresses depending upon a heat load and phase transformations, connection of thermophysical parameters with temperature and phase composition of steel is taken into account. In the model of stresses structural and transformation strains are taken into account
Keywords: laser welding, steel, welded joints, model, numeric investigation, phase composition, structural and transformation strain, stressed state

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Suggested Citation

A. Bokota, W. Piekarska (2008) Modeling of residual stresses in laser welding. The Paton Welding J., 06, 19-24.

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