Welding Distortion Minimization for an Aluminum Alloy Extruded Beam Structure Using a 2D Model

[+] Author and Article Information
Bart O. Nnaji, Kyoung-Yun Kim

Automation and Robotics Laboratory, Department of Industrial Engineering, University of Pittsburgh, Pittsburgh, PA

Deepak Gupta

Computer Associates International, New York, NY

J. Manuf. Sci. Eng 126(1), 52-63 (Mar 18, 2004) (12 pages) doi:10.1115/1.1643078 History: Received May 01, 2003; Online March 18, 2004
Copyright © 2004 by ASME
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Drawing for the subassembly with dimensions in mm
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First stage in simplification: 2D layout with rectangular section beams
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Effect of joint rigidity on beam deformation mode
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Simplified model with torsion springs (stiffness k) at the otherwise revolute joints
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Use of control elements to enforce angular shrinkages and desired behavior      
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2-D beam element model for the welded frame
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Deformation behavior with a cast node
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Maximum stress and bending moment across the beams for sequence 1-6-4-X-X-X
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Final exaggerated deformed shapes for different sequences
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Deformation plots at various stages of welding for some sequences



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