Defining a gasket displacement material for ANSYS analyses

The Gasket – Displacement material corresponds to the ANSYS TB command with the GASKET option. Only the INTER195 (Hex8) element type is supported. Temperature-dependent gasket material properties are not supported.

In the Displacement Gasket Material dialog box, define the following options:

• Transverse Shear Modulus — Gasket transverse shear stiffness.This option corresponds to the TSS parameter on the TB command.

• Initial Gap — Initial gasket gap.This option corresponds to the PARA, C1 parameter on the TB command.

• Stable Stiffness — Stable stiffness for numerical stabilization.This option corresponds to the PARA, C2 parameter on the TB command.

• Maximum Tension Stress — Stress cap for gasket in tension.This option corresponds to the PARA, C3 parameter on the TB command.

• Loading Curve — Gasket compression data to define the pressure vs. closure behavior (relative displacement of top and bottom gasket surfaces).This option corresponds to the COMP parameter on the TB command.

• Unloading Curve 1 — Gasket tension data to define the pressure vs. closure behavior. When you define only one unloading curve (that is, linear unloading), the LUNL parameter on the TB command is written to the input file.

• Unloading Curve 2–10 — Additional unloading curves.When you define more than one unloading curve (that is, nonlinear unloading), the NUNL parameter on the TB command is written to the input file.

When no unloading curves are defined, the material behavior follows the loading curve while it is unloaded.

Element connectivity

The element connectivity must be I,J,K,L,M,N,O,P. That is, I,J,K,L must be the bottom face and M,N,O,P must be the top face. This will ensure the correct Gasket thickness direction.

INTER195 element

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Defining a gasket displacement material for ANSYS analyses, Simcenter 3D 2021.1 Series

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