SOLID92
3D 10-Node
Tetrahedral Structural Solid
SOLID92 Element Description
Although this archived element is available for use in your analysis, Ansys, Inc. recommends using a current-technology element such as SOLID187. |
SOLID92 has a quadratic displacement behavior and is well suited to model irregular meshes (such as produced from various CAD/CAM systems).
The element is defined by ten nodes having three degrees of freedom at each node: translations in the nodal x, y, and z directions. The element also has plasticity, creep, swelling, stress stiffening, large deflection, and large strain capabilities.
SOLID92 Input Data
The geometry, node locations, and the coordinate system for this element are shown in Figure 92.1: SOLID92 Geometry.
Beside the nodes, the element input data includes the orthotropic material properties. Orthotropic material directions correspond to the element coordinate directions. The element coordinate system orientation is as described in Coordinate Systems.
Element loads are described in Element Loading. Pressures may be input as surface loads on the element faces as shown by the circled numbers on Figure 92.1: SOLID92 Geometry. Positive pressures act into the element. Temperatures and fluences 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). If all corner node temperatures are specified, each midside node temperature defaults to the average temperature of its adjacent corner nodes. For any other input temperature pattern, unspecified temperatures default to TUNIF. Similar defaults occurs for fluence except that zero is used instead of TUNIF.
You cannot set initial state conditions (INISTATE) using this element. You can set initial state conditions using current-technology elements only (such as LINK180,SHELL181). To continue using initial state conditions in future versions of Mechanical APDL, consider using a current element technology. For more information, see Legacy vs. Current Element Technologies in the Element Reference. For more information about setting initial state values, see INISTATE and Initial State Loading in the Basic Analysis Guide.
Pressure load stiffness effects are included in linear eigenvalue buckling automatically. If an unsymmetric matrix is needed for pressure load stiffness effects, use NROPT,UNSYM.
A summary of the element input is given in "SOLID92 Input Summary". A general description of element input is given in Element Input.
SOLID92 Input Summary
- Nodes
I, J, K, L, M, N, O, P, Q, R
- Degrees of Freedom
UX, UY, UZ
- Real Constants
None
- Material Properties
EX, EY, EZ, ALPX, ALPY, ALPZ (or CTEX, CTEY, CTEZ or THSX, THSY, THSZ), PRXY, PRYZ, PRXZ (or NUXY, NUYZ, NUXZ), DENS, GXY, GYZ, GXZ, BETD, ALPD, DMPR
- Surface Loads
- Pressures --
face 1 (J-I-K), face 2 (I-J-L), face 3 (J-K-L), face 4 (K-I-L)
- Body Loads
- Temperatures --
T(I), T(J), T(K), T(L), T(M), T(N), T(O), T(P), T(Q), T(R)
- Fluences --
FL(I), FL(J), FL(K), FL(L), FL(M), FL(N), FL(O), FL(P), FL(Q), FL(R)
- Special Features
Plasticity (BISO, BKIN, DP, ANISO) Creep (CREEP, RATE) Swelling (SWELL) Elasticity (MELAS) Other material (USER) Stress stiffening Large deflection Large strain Birth and death Adaptive descent Items in parentheses refer to
Lab
data tables associated with the TB,Lab
command.- KEYOPT(5)
Extra element output:
- 0 --
Basic element printout
- 1 --
Integration point printout
- 2 --
Nodal stress printout
- KEYOPT(6)
Extra surface output:
- 0 --
Basic element printout
- 4 --
Surface printout for faces with nonzero pressure
SOLID92 Output Data
The solution output associated with the element is in two forms:
Nodal displacements included in the overall nodal solution
Additional element output as shown in Table 92.1: SOLID92 Element Output Definitions
Several items are illustrated in Figure 92.2: SOLID92 Stress Output. The element stress directions are parallel to the element coordinate system. The surface stress outputs are in the surface coordinate system and are available for any face (KEYOPT(6)). The coordinate system for face J-I-K is shown in Figure 92.2: SOLID92 Stress Output. The other surface coordinate systems follow similar orientations as indicated by the pressure face node description. Surface stress printout is valid only if the conditions described in Element Solution are met. A general description of solution output is given in Solution Output. See the Basic Analysis Guide for ways to view results.
The Element Output Definitions table uses the following notation:
A colon (:) in the Name column indicates that 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 letter or number refers to a table footnote that describes when the item is conditionally available, and “-” indicates that the item is not available.
Table 92.1: SOLID92 Element Output Definitions
Name | Definition | O | R |
---|---|---|---|
EL | Element Number | Y | Y |
NODES | Corner nodes - I, J, K, L | Y | Y |
MAT | Material number | Y | Y |
VOLU: | Volume | Y | Y |
XC, YC, ZC | Location where results are reported | Y | 3 |
PRES | Pressures P1 at nodes J, I, K; P2 at I, J, L; P3 at J, K, L; P4 at K, I, L | Y | Y |
TEMP | Temperatures T(I), T(J), T(K), T(L) | Y | Y |
FLUEN | Fluences FL(I), FL(J), FL(K), FL(L), FL(M), FL(N), FL(O), FL(P), FL(Q), FL(R) | Y | Y |
S:X, Y, Z, XY, YZ, XZ | Stresses | Y | Y |
S:1, 2, 3 | Principal stresses | Y | Y |
S:INT | Stress intensity | Y | Y |
S:EQV | Equivalent stress | Y | Y |
EPEL:X, Y, Z, XY, YZ, XZ | Elastic strains | Y | Y |
EPEL:1, 2, 3 | Principal elastic strains | Y | Y |
EPEL:EQV | Equivalent elastic strains [4] | Y | - |
EPTH:X, Y, Z, XY, YZ, XZ | Thermal strains | 1 | 1 |
EPTH:EQV | Equivalent thermal strains [4] | 1 | 1 |
EPPL:X, Y, Z, XY, YZ, XZ | Plastic strains | 1 | 1 |
EPPL:EQV | Equivalent plastic strains [4] | 1 | 1 |
EPCR:X, Y, Z, XY, YZ, XZ | Creep strains | 1 | 1 |
EPCR:EQV | Equivalent creep strains [4] | 1 | 1 |
EPSW: | Swelling strain | 1 | 1 |
NL:EPEQ | Average equivalent plastic strain | 1 | 1 |
NL:SRAT | Ratio of trial stress to stress on yield surface | 1 | 1 |
NL:SEPL | Equivalent stress from stress-strain curve | 1 | 1 |
NL:HPRES | Hydrostatic pressure | - | 1 |
FACE | Face label | 2 | 2 |
TRI | Nodes on this face | 2 | - |
AREA | Face area | 2 | 2 |
TEMP | Face average temperature | 2 | 2 |
EPEL(X, Y, XY) | Surface elastic strains | 2 | 2 |
PRES | Surface pressure | 2 | 2 |
S(X, Y, XY) | Surface stresses | 2 | 2 |
S(1, 2, 3) | Surface principal stresses | 2 | 2 |
SINT | Surface stress intensity | 2 | 2 |
SEQV | Surface equivalent stress | 2 | 2 |
LOCI:X, Y, Z | Integration point locations | - | Y |
Nonlinear solution (output if the element has a nonlinear material)
Surface output (if KEYOPT(6) = 4 and a nonzero pressure face)
Available only at centroid as a *GET item.
The equivalent strains use an effective Poisson's ratio: for elastic and thermal this value is set by the user (MP,PRXY); for plastic and creep this value is set at 0.5.
Table 92.3: SOLID92 Item and Sequence Numbers lists output available through the ETABLE command using the Sequence Number method. See The General Postprocessor (POST1) in the Basic Analysis Guide and The Item and Sequence Number Table in this manual for more information. The following notation is used in Table 92.3: SOLID92 Item and Sequence Numbers:
- Name
output quantity as defined in the Table 92.1: SOLID92 Element Output Definitions
- Item
predetermined Item label for ETABLE command
- I,J,...,R
sequence number for data at nodes I,J,...,R
See Surface Solution for the item and sequence numbers for surface output for the ETABLE command.
SOLID92 Assumptions and Restrictions
The element must not have a zero volume. Elements may be numbered either as shown in Figure 92.1: SOLID92 Geometry or may have node L below the I-J-K plane.
An edge with a removed midside node implies that the displacement varies linearly, rather than parabolically, along that edge. See Quadratic Elements (Midside Nodes) in the Modeling and Meshing Guide for information about the use of midside nodes.
SOLID92 Product Restrictions
When used in the product(s) listed below, the stated product-specific restrictions apply to this element in addition to the general assumptions and restrictions given in the previous section.
Ansys Professional —
Fluence body loads are not applicable.
The only special feature allowed is stress stiffening.