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Unformatted text preview: THREE-DIMENSIONAL STRESS ANALYSIS OF A WELDED PLATE STRUCTURAL DETAIL T10-1 TUTORIAL T10 THREE-DIMENSIONAL STRESS ANALYSIS OF A WELDED PLATE STRUCTURAL DETAIL A structural detail in the form of a welded steel T-joint plate is sketched below ( E = 200 GPa and ν = 0.3 ). All indicated dimensions are in millimeters. In addition, the plate is 150 mm wide and the fillet welds are triangular having 5 mm legs (omitted for clarity). The plate is fixed against all displacement along its left edge and against only vertical displacement along its right edge. The structural detail is subjected to uniform tensile loads along the top edge and right hand plate edge of 5 MPa and 25 MPa , respectively. Use 20-node hexahedral elements with reduced integration to model the detail including the fillet welds. Determine the deformation and stress state of the welded structural detail, particularly the profiles of the maximum principal stress component σ P1 and the normal stress component σ x (i.e., S11) on the surface of the plate leading up to the weld toe. These are known as structural stresses in the hot spot stress approach to determining the fatigue life of a welded plate component. 1 Abaqus/CAE features and modeling skills addressed in the tutorial include: A. Pre-processing: (a) Solids modeling using Extrusion feature (b) Fillet weld geometry using the Create Chamfer tool (c) Surface loads and boundary conditions. B. Solution processing: (a) Modeling plate bending with 3D elements through the thickness (b) 3D swept meshing with hexahedral element shapes (c) 3D stress analysis using 20-node hexahedral elements and reduced integration. C. Post-processing: (a) Probing nodes for high stress locations (b) Graphing bending stress along the plate surface near a weld toe notch (c) Developing finite element structural stress data in support of fatigue analysis. 1 Stress Determination for Fatigue Analysis of Welded Components, Ed. E. Niemi, IIS/IIW-1221-93, The International Institute of Welding, Abington, Cambridge, England, 1995. fillet welds omitted for clarity THREE-DIMENSIONAL STRESS ANALYSIS OF A WELDED PLATE STRUCTURAL DETAIL T10-2 * Launch Abaqus/CAE and create a model database called WeldPlate. Start\All Programs\Abaqus 6.8-2\ Abaqus CAE >press Create Model Database Model\Manager... >press Rename... >"WeldPlate" >OK >press Dismiss * Save the model database file, WeldPlate.cae (the .cae extension will be added automatically). File\Save As... >"WeldPlate" >OK =============================================================== PREPROCESSING PHASE * Begin creating the WeldPlate model in Module Part. Create a part in the form of a planar structure that is to be extruded 150 mm (Base Feature is Solid). The planar pattern to be extruded is that of an inverted T shape comprised of two perpendicular plates joined by fillet welds. Straight lines are sketched by picking or entering coordinates with the Create...
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This note was uploaded on 08/09/2011 for the course MAE 168 taught by Professor Klug during the Spring '11 term at UCLA.
- Spring '11