Finite element analysis of arc welding

Friedman, E.

doi:10.2172/5691810

Title: Finite element analysis of arc welding

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Abstract

Analytical models of the gas tungsten-arc welding process into finite element computer programs provides a valuable tool for determining the welding thermal cycle, weld bead shape, and penetration characteristics, as well as for evaluating the stresses and distortions generated as a result of the temperature transients. The analysis procedures are applicable to planar or axisymmetric welds with arbitrary cross-sectional geometries, under quasistationary conditions. The method used for determining temperatures features an iteration procedure to accurately account for the latent heat absorbed during melting and liberated during solidification of the weld. By simulating the heat input from the arc to the workpiece by a normal distribution function, temperature transients, weld bead dimensions, and cooling rates are evaluated as functions of both the magnitude and distribution of heat input, weldment geometry, and weld speed (or duration of heating for stationary arcs). Modeling of the welding thermal cycle is a prerequisite to analytical treatments of metallurgical changes in weld metal and heat-affected zone material, residual stresses and distortions, and weld defects. A quasistationary formulation for moving welds enables temperatures to be calculated using a two-dimensional heat conduction computer program. The present limitation of high welding speed can, however, be relaxed without altering themore »« less

Authors:: Friedman, E.

Publication Date:: Tue Jan 01 00:00:00 EST 1980

Research Org.:: Bettis Atomic Power Lab. (BAPL), West Mifflin, PA (United States)

OSTI Identifier:: 5691810

Report Number(s):: WAPD-TM-1430
TRN: 80-005686

DOE Contract Number:: EY-76-C-11-0014

Resource Type:: Technical Report

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; GAS TUNGSTEN-ARC WELDING; WELDED JOINTS; STRESS ANALYSIS; COMPUTER CALCULATIONS; COMPUTER CODES; FINITE ELEMENT METHOD; ITERATIVE METHODS; MATHEMATICAL MODELS; TEMPERATURE MEASUREMENT; ARC WELDING; FABRICATION; JOINING; JOINTS; NUMERICAL SOLUTION; WELDING; 360101* - Metals & Alloys- Preparation & Fabrication

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                    Friedman, E. Finite element analysis of arc welding.  United States: N. p., 1980. 
        Web.  doi:10.2172/5691810.

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                    Friedman, E. Finite element analysis of arc welding.  United States.  https://doi.org/10.2172/5691810

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                    Friedman, E. 1980.  
        "Finite element analysis of arc welding".  United States.  https://doi.org/10.2172/5691810.  https://www.osti.gov/servlets/purl/5691810.

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@article{osti_5691810,

  title        = {Finite element analysis of arc welding},

  author       = {Friedman, E.},

  abstractNote = {Analytical models of the gas tungsten-arc welding process into finite element computer programs provides a valuable tool for determining the welding thermal cycle, weld bead shape, and penetration characteristics, as well as for evaluating the stresses and distortions generated as a result of the temperature transients. The analysis procedures are applicable to planar or axisymmetric welds with arbitrary cross-sectional geometries, under quasistationary conditions. The method used for determining temperatures features an iteration procedure to accurately account for the latent heat absorbed during melting and liberated during solidification of the weld. By simulating the heat input from the arc to the workpiece by a normal distribution function, temperature transients, weld bead dimensions, and cooling rates are evaluated as functions of both the magnitude and distribution of heat input, weldment geometry, and weld speed (or duration of heating for stationary arcs). Modeling of the welding thermal cycle is a prerequisite to analytical treatments of metallurgical changes in weld metal and heat-affected zone material, residual stresses and distortions, and weld defects. A quasistationary formulation for moving welds enables temperatures to be calculated using a two-dimensional heat conduction computer program. The present limitation of high welding speed can, however, be relaxed without altering the two-dimensional framework of the procedure.},

  doi          = {10.2172/5691810},

  url          = {https://www.osti.gov/biblio/5691810},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Jan 01 00:00:00 EST 1980},

  month        = {Tue Jan 01 00:00:00 EST 1980}

}

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