Release 11.0 Documentation for ANSYS
www.kxcad.net Home > CAE Index > ANSYS Index > Release 11.0 Documentation for ANSYS
INTER194 is a 3-D 16-node quadratic interface element. When used in conjunction with 3-D quadratic structural elements (VISCO89, SOLID92, SOLID95, SOLID96, SOLID186, and SOLID187), INTER194 is used to simulate gasket joints. It is defined by 16 nodes having three degrees of freedom at each node: translations in the nodal x, y, and z directions.
See Gasket Material and INTER194 in the Theory Reference for ANSYS and ANSYS Workbench for more details about this element.
Also see Gasket Joints Simulation in the Structural Analysis Guide for more details on the gasket capability in ANSYS.
The element geometry, node locations, connectivity, and the nodal coordinate system are shown in Figure 194.1: "INTER194 Geometry". The element geometry is defined by 16 nodes, which form bottom and top surfaces of the element. The bottom surface is defined by nodes, I, J, K, L, Q, R, S, T; and the top surface is defined by nodes, M, N, O, P, U, V, W, X. As shown, the element connectivity is defined as I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X. The element is degenerated to a wedge (prism) element, when K=L=S and O=P=W, as shown in Figure 194.2: "INTER194 3-D 16-Node Degenerated Quadratic Interface".
For the degenerated element, 3 integration points are used for numerical integration. The degenerated element can be used in conjunction with the 10-node solid tetrahedral elements SOLID92 and SOLID187. Dropping any or some of midside nodes, Q, R, S, T, U, V, W, X is not permitted.
Temperatures may be input as element body loads at the nodes. The node I temperature T(I), defaults to TUNIF. If all other temperatures are unspecified, they default to T(I). For any other input pattern, unspecified temperatures default to TUNIF.
The next table summarizes the element input. See Element Input in the Elements Reference for a general description of element input.
I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X
UX, UY, UZ
None
DAMP, ALPX (or CTEX or THSX)
T(I), T(J), T(K), T(L) T(M), T(N), T(O), T(P), T(Q), T(R), T(S), T(T), T(U), T(V), T(W), T(X)
Gasket material associated with TB,GASKET.
See Gasket Material in the Theory Reference for ANSYS and ANSYS Workbench for details on the material model.
Element deformation:
Through-thickness deformation only
Through-thickness and transverse shear deformation
The solution output associated with the element is in two forms:
Nodal items such as nodal displacements are included in the overall nodal solution.
Element items such as stresses and closures are element outputs as shown in Table 194.1: "INTER194 Element Output Definitions".
The output directions for element items are parallel to the local element coordinate system based on the element midplane as illustrated in Figure 194.3: "INTER194 Stress Output". See Gasket Material in the Theory Reference for ANSYS and ANSYS Workbench for details.
A general description of solution output is given in Solution Output. See the Basic Analysis Guide for ways to review results.
The Element Output Definitions table uses the following notation:
A colon (:) in the Name column indicates the item can be accessed by the Component Name method [ETABLE, ESOL]. The O column indicates the availability of the items in the file Jobname.OUT. The R column indicates the availability of the items in the results file.
In either the O or R columns, Y indicates that the item is always available, a number refers to a table footnote that describes when the item is conditionally available, and a - indicates that the item is not available.
Table 194.1 INTER194 Element Output Definitions
| Name | Definition | O | R |
|---|---|---|---|
| EL | Element number | - | Y |
| NODES | Node connectivity - I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X | - | Y |
| MAT | Material number | - | Y |
| TEMP | Temperatures T(I), T(J), T(K), T(L), T(M), T(N), T(O), T(P), T(Q), T(R), T(S), T(T), T(U), T(V), T(W), T(X) | - | Y |
| GKS:X, (XY, XZ) | Stress (also gasket pressure) | Y | Y |
| GKD:X, (XY, XZ) | Total closure | Y | Y |
| GKDI:X, (XY, XZ) | Total inelastic closure | Y | Y |
| GKTH:X, (XY, XZ) | Thermal closure | Y | Y |
This element is not supported for initial stress.
Pressure as a type of surface load on element faces is not supported by this element.
This element is based on the local coordinate system. ESYS is not permitted.
This element is only available for static analyses.
