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T9 Gusset Tutorial 6.8


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P LANE S TRESS A NALYSIS OF G USSET P LATE T9-1 T UTORIAL T9 P LANE S TRESS A NALYSIS OF G USSET P LATE Determine the deformation and plane stress state of the ¼-inch thick steel gusset plate shown using Abaqus/CAE, observing the stress concentration in the fillet and the bending stress in the lower flange. Use the eight-node quadratic isoparametric element with reduced integration. 1 The plate has four identical embossed bolt holes where the thickness is increased locally. The inside perimeters of the two lower holes are completely fixed against displacement. The bolt load P = 0 . 5 kip acting downward on the two upper holes bears on the lower half of the inside edge of the hole. All dimensions are in inches. Abaqus/CAE features and modeling skills addressed in the tutorial include: A. Preprocessing: (a) Partitioning to accommodate regions having different thickness (b) Distributing concentrated loads at Reference Points. B. Solution Processing: (a) Meshing with quadrilateral elements (b) Using eight-node quadrilateral elements with reduced integration (c) Plane stress analysis. C. Post-processing: (a) Contour plots of displacements and stresses (b) Graphing stress results using "Point list." 1 The Abaqus/CAE element library does not contain the nine-node, biquadratic isoparametric plane stress element. Alternatively, the Abaqus/Standard element library does contain a 9-node shell element that in theory could be used in a degenerate form. It also contains the 27-node triquadratic element, which is the extension to 3D of the two-dimensional 9-node biquadratic (Ch. 10).
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P LANE S TRESS A NALYSIS OF G USSET P LATE T9-2 * Launch Abaqus/CAE and create a model database called GussetPlate. Start\All Programs\Abaqus 6.8-2\ Abaqus CAE >select Create Model Database * The new model database has the default name Model-1. Rename it GussetPlate. Model\Rename\Model-1 >" GussetPlate " >OK * Save the model database (the .cae extension will append automatically). File\Save As... >"GussetPlate" >OK =============================================================== PREPROCESSING PHASE * Create a new part in the form of a deformable, planar structure (Base Feature is Shell).
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