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Nonlinear Rubber Simulation of Hydraulic Seal Contact Mec...

Nonlinear Rubber Simulation of Hydraulic Seal Contact Mechanics

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Sealing Assembly - Quarter model - Geometry

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2 Geometries

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About this project

Bidirectional Hydraulic Sealing System: Nonlinear Structural Analysis This project demonstrates the comprehensive simulation of a bidirectional hydraulic sealing system using advanced nonlinear structural analysis. The model evaluates seal performance under realistic operating conditions including installation, positioning, and bidirectional pressure loading. Geometry and Components: The assembly features a multi-component axisymmetric hydraulic seal system consisting of: - Elastomeric sealing element with hyperelastic material behavior (Mooney-Rivlin 5-parameter model) - Elastoplastic seal component with strain hardening Steel housing groove and positioning tool - Movable steel rod component Analysis Methodology: The simulation employs a multi-step nonlinear structural analysis with contact mechanics to replicate the complete sealing lifecycle: - Positioning Phase: Tool and component alignment - Fitting Phase: Seal installation and initial compression - Pressurization Phase 1: Unidirectional pressure application - Pressurization Phase 2: Bidirectional pressure testing Key Features: - Hyperelastic material modeling for rubber-like components (Mooney-Rivlin) - Elastoplastic material behavior with isotropic hardening - Double-sided contact formulation with Coulomb bilinear friction - Follower pressure loads to capture geometric nonlinearity - Time-dependent displacement and pressure profiles via tabular functions - Symmetry boundary conditions for computational efficiency Results: The analysis tracks critical performance metrics including displacement fields, von Mises stress distribution, equivalent plastic strain, Cauchy stress tensor components, total strain, contact pressure distribution, and contact body forces on sealing interfaces. This simulation validates seal integrity and performance under bidirectional hydraulic loading conditions typical of reciprocating hydraulic systems.