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Elastomeric Seal

Elastomeric Seal. MSC.Marc 2005r2 MSC.Patran 2005r2. Estimated Time for Completion: 10 minutes Experience Level: Higher. Topics Covered. 3D solid element Hyperelastic material using Mooney-Rivlin model Global adaptive meshing with tetrahedral mesher Rigid contact with velocity control

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Elastomeric Seal

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  1. Elastomeric Seal MSC.Marc 2005r2 MSC.Patran 2005r2 Estimated Time for Completion: 10 minutes Experience Level: Higher

  2. Topics Covered • 3D solid element • Hyperelastic material using Mooney-Rivlin model • Global adaptive meshing with tetrahedral mesher • Rigid contact with velocity control • Deformable contact • Nonlinear static analysis with advanced options

  3. Problem Description • For analyses using the updated Lagrange formulation based finite element method, one often encounters element distortion in applications that involve large deformation. When elements become too distorted the analysis fails. The global remeshing feature alleviates this situation by automatically generating a new mesh, transferring history data from the previous mesh and resuming the analysis. Global remeshing also helps improving the anlysis by mesh refinement in the area where small elements are required due to contact and geometry change, and speeding up the analysis by generating larger elements in the area that does not require small elements. A rubber seal with a rectangular cross-section is pressed laterally by a rigid tool. Because of the symmetry, only a half of the seal is considered. With a thickness of 0.2cm, the model is setup as a 3D problem. Assuming this is a long rubber seal in the thickness direction, two symmetry surfaces are used. The tool pressure is applied to the top of the seal and simulated by moving the top rigid surface down.

  4. Summary of Model • Analysis: • Nonlinear statics with advanced options • Small strain for plasticity • Large strain – Updated Lagrange for elasticity • Job parameters • Global adaptive meshing with tetrahedral mesher Hex8 element Hyperelastic material using Mooney-Rivlin model Rigid contact on bottom plate Rigid contact on side plate Rigid contact on push plate with velocity control Rigid contact on top plate

  5. Modify and Run Session File a b c d e f To run the session file that reads other files, the location specified in the session file must correspond to the actual location of the files. • Locate and open the folder containing session and other files • Open .ses file • Enter the correct location of the folder and Press Ctrl+S buttons to save the file • Click File menu / Select Session / Select Play • Select .ses file • Click Apply

  6. Expected Results

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