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ABAQUS – Advanced use

ABAQUS – Advanced use . Element and Node Sets Shear Locking in solid elements Reduced Integration and Zero Energy Modes Sign Convention Integration Schemes Shell Elements – pitfalls to avoid Beam Elements General Suggestions. ABAQUS CAE - Modules.

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ABAQUS – Advanced use

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  1. ABAQUS – Advanced use • Element and Node Sets • Shear Locking in solid elements • Reduced Integration and Zero Energy Modes • Sign Convention • Integration Schemes • Shell Elements – pitfalls to avoid • Beam Elements • General Suggestions

  2. ABAQUS CAE - Modules • PART Create part using Sketcher • SKETCH sketcher • ASSEMBLY Creation of instances and assembly. • PROPERTY Define Material, SECTION Properties and ASSIGNS it. • STEP Analysis Steps • INTERACTION Interaction Properties, Constraints. Contact between 2 surfaces, • LOAD Loads, Boundary Conditions and Fields. • MESH Choice of element • JOB Creates Job, associates job with a MODEL • VISUALIZATION Post processing

  3. Sign Convention • Displacements and point loads are positive in the direction of the positive axes. • Normal Stresses – Tensile stress is +ve. • Shear stress – anticlockwise about element centre is +ve. • Direct strains – Tensile stress is +ve • Soils consolidation s’ = s + u

  4. Stress Discontinuities • Stresses are calculated accurately at Gauss (Integration) points. • Displacements are continuous across element boundaries. • Stresses jump across element boundaries.

  5. Shell Element - Normal • The direction of the +ve normal is defined by the nodal sequence and the Right hand rule. • The section points are numbered in the direction of the +ve normal. The section points identify the sections.

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