Gasket analysis

For Simcenter Nastran, ANSYS, Simcenter Samcef, and Abaqus models, Pre/Post includes tools that help you to model and analyze gaskets. Gaskets are relatively thin components which you can place between two bodies to create a sealing effect and prevent the leakage of fluid. Gaskets can be made of many different materials, such as rubber or composites. The gasket material itself is usually under compression.

General gasket modeling process

Although the details of the process for modeling and analyzing gaskets differ depending on your specified solver, the overall process is fairly standard. In general, you model a gasket as a very thin solid body that lies between two other solid bodies.

You mesh the gasket itself, along with the bodies on either side, with solid elements. Generally, the mesh on the gasket is only a single layer of solid elements. To ensure the proper connectivity in a gasket analysis, you must ensure that the nodes from the gasket mesh are connected to the nodes on the meshes on the surrounding bodies. The specific requirements for how you establish this connection depend on your solver. In general, you can either:

• Ensure that the elements from the gasket mesh share nodes with the elements on the two adjacent bodies. In Pre/Post, you can use a Glue Coincident type of Mesh Mating Condition, for example, to ensure that the nodes are shared. You can also merge nodes between the adjacent bodies.

• Connect the nodes on the gasket mesh to the nodes on the surrounding bodies with constraints, such as an MPC type of Manual Coupling.

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Gasket analysis, Simcenter 3D 2021.1 Series

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