ProductsAbaqus/StandardAbaqus/ExplicitAbaqus/CAE Element typesStress/displacement elements
Active degrees of freedom1, 2, 3 Additional solution variablesThe constant pressure hybrid elements have one additional variable relating to pressure, and the linear pressure hybrid elements have four additional variables relating to pressure. Element types C3D8I and C3D8IH have thirteen additional variables relating to the incompatible modes. Element types C3D10M and C3D10MH have three additional displacement variables. Element type CSS8 has seven additional variables relating to the incompatible modes. Stress/displacement variable node elements
Active degrees of freedom1, 2, 3 Additional solution variablesThe hybrid elements have four additional variables relating to pressure. Coupled temperature-displacement elements
Active degrees of freedom1, 2, 3, 11 at corner nodes 1, 2, 3 at midside nodes of second-order elements in Abaqus/Standard 1, 2, 3, 11 at midside nodes of modified displacement and temperature elements in Abaqus/Standard Additional solution variablesThe constant pressure hybrid element has one additional variable relating to pressure, and the linear pressure hybrid elements have four additional variables relating to pressure. Element types C3D10MT and C3D10MHT have three additional displacement variables and one additional temperature variable. Coupled thermal-electrical-structural elements
Active degrees of freedom1, 2, 3, 9, 11 at corner nodes 1, 2, 3 at midside nodes of second-order elements in Abaqus/Standard 1, 2, 3, 9, 11 at midside nodes of modified displacement and temperature elements in Abaqus/Standard Additional solution variablesThe constant pressure hybrid element has one additional variable relating to pressure, and the linear pressure hybrid elements have four additional variables relating to pressure. Element types Q3D10M and Q3D10MH have three additional displacement variables, one additional electric potential variable, and one additional temperature variable. Diffusive heat transfer or mass diffusion elements
Active degrees of freedom11 Additional solution variablesNone. Forced convection/diffusion elements
Active degrees of freedom11 Additional solution variablesNone. Coupled thermal-electrical elements
Active degrees of freedom9, 11 Additional solution variablesNone. Pore pressure elements
Active degrees of freedom1, 2, 3 at midside nodes for all elements except C3D10MP and C3D10MPH, which also have degree of freedom 8 active at midside nodes 1, 2, 3, 8 at corner nodes Additional solution variablesThe constant pressure hybrid elements have one additional variable relating to the effective pressure stress, and the linear pressure hybrid elements have four additional variables relating to the effective pressure stress to permit fully incompressible material modeling. Element types C3D10MP and C3D10MPH have three additional displacement variables and one additional pore pressure variable. Coupled temperature–pore pressure elements
Active degrees of freedom1, 2, 3, 8, 11 Additional solution variablesThe constant pressure hybrid elements have one additional variable relating to the effective pressure stress to permit fully incompressible material modeling. Element type C3D10MPT has three additional displacement variables, one additional pore pressure variable, and one additional temperature variable. Acoustic elements
Active degrees of freedom8 Additional solution variablesNone. Piezoelectric elements
Active degrees of freedom1, 2, 3, 9 Additional solution variablesNone. Electromagnetic elements
Active degrees of freedomMagnetic vector potential (for more information, see Boundary conditions and Boundary conditions). Additional solution variablesNone. Nodal coordinates requiredX, Y, Z Element property definitionInput File Usage SOLID SECTION Abaqus/CAE Usage Property module: Create Section: select Solid as the section Category and Homogeneous or Electromagnetic, Solid as the section Type Element-based loadingDistributed loadsDistributed loads are available for all elements with displacement degrees of freedom. They are specified as described in Distributed loads. *dload
FoundationsFoundations are available for Abaqus/Standard elements with displacement degrees of freedom. They are specified as described in Element foundations. *foundation
Distributed heat fluxesDistributed heat fluxes are available for all elements with temperature degrees of freedom. They are specified as described in Thermal loads. *dflux
Film conditionsFilm conditions are available for all elements with temperature degrees of freedom. They are specified as described in Thermal loads. *film
Radiation typesRadiation conditions are available for all elements with temperature degrees of freedom. They are specified as described in Thermal loads. *radiate
Distributed flowsDistributed flows are available for all elements with pore pressure degrees of freedom. They are specified as described in Pore fluid flow. *flow
Distributed impedancesDistributed impedances are available for all elements with acoustic pressure degrees of freedom. They are specified as described in Acoustic and shock loads. *impedance
Electric fluxesElectric fluxes are available for piezoelectric elements. They are specified as described in Piezoelectric analysis. *decharge
Distributed electric current densitiesDistributed electric current densities are available for coupled thermal-electrical, coupled thermal-electrical-structural elements, and electromagnetic elements. They are specified as described in Coupled thermal-electrical analysis, Fully coupled thermal-electrical-structural analysis, and Eddy current analysis. *decurrent
Distributed concentration fluxesDistributed concentration fluxes are available for mass diffusion elements. They are specified as described in Mass diffusion analysis. *dflux
Surface-based loadingDistributed loadsSurface-based distributed loads are available for all elements with displacement degrees of freedom. They are specified as described in Distributed loads. *dsload
Distributed heat fluxesSurface-based heat fluxes are available for all elements with temperature degrees of freedom. They are specified as described in Thermal loads. *dsflux
Film conditionsSurface-based film conditions are available for all elements with temperature degrees of freedom. They are specified as described in Thermal loads. *sfilm
Radiation typesSurface-based radiation conditions are available for all elements with temperature degrees of freedom. They are specified as described in Thermal loads. *sradiate
Distributed flowsSurface-based flows are available for all elements with pore pressure degrees of freedom. They are specified as described in Pore fluid flow. *sflow
Distributed impedancesSurface-based impedances are available for all elements with acoustic pressure degrees of freedom. They are specified as described in Acoustic and shock loads. Incident wave loadingSurface-based incident wave loads are available for all elements with displacement degrees of freedom or acoustic pressure degrees of freedom. They are specified as described in Acoustic and shock loads. If the incident wave field includes a reflection off a plane outside the boundaries of the mesh, this effect can be included. Electric fluxesSurface-based electric fluxes are available for piezoelectric elements. They are specified as described in Piezoelectric analysis. *dsecharge
Distributed electric current densitiesSurface-based electric current densities are available for coupled thermal-electrical, coupled thermal-electrical-structural, and electromagnetic elements. They are specified as described in Coupled thermal-electrical analysis, Fully coupled thermal-electrical-structural analysis, and Eddy current analysis. *dsecurrent
Element outputFor most elements output is in global directions unless a local coordinate system is assigned to the element through the section definition (Orientations) in which case output is in the local coordinate system (which rotates with the motion in large-displacement analysis). See State storage for details. Stress, strain, and other tensor componentsStress and other tensors (including strain tensors) are available for elements with displacement degrees of freedom. All tensors have the same components. For example, the stress components are as follows:
Note: the order shown above is not the same as that used in user subroutine VUMAT. Heat flux componentsAvailable for elements with temperature degrees of freedom.
Pore fluid velocity componentsAvailable for elements with pore pressure degrees of freedom.
Mass concentration flux componentsAvailable for elements with normalized concentration degrees of freedom.
Electrical potential gradientAvailable for elements with electrical potential degrees of freedom.
Electrical flux componentsAvailable for piezoelectric elements.
Electrical current density componentsAvailable for coupled thermal-electrical and coupled thermal-electrical-structural elements.
Electrical field componentsAvailable for electromagnetic elements in an eddy current analysis.
Magnetic flux density componentsAvailable for electromagnetic elements.
Magnetic field componentsAvailable for electromagnetic elements.
Eddy current density components in an eddy current analysisAvailable for electromagnetic elements in an eddy current analysis.
Applied volume current density components in an eddy current or magnetostatic analysisAvailable for electromagnetic elements in an eddy current or magnetostatic analysis.
Node ordering and face numbering on elementsAll elements except variable node elements
Variable node elements
$\otimes $ 16–18 are midface nodes on the three rectangular faces (see below for faces 1 to 5). These $\otimes $ nodes can be omitted from an element by entering a zero or blank in the corresponding position when giving the nodes on the element. Only nodes 16–18 can be omitted.
$\otimes $ (nodes 22–27) are midface nodes on the six faces (see below for faces 1 to 6). These $\otimes $ nodes can be deleted from an element by entering a zero or blank in the corresponding position when giving the nodes on the element. Only nodes 22–27 can be omitted.
Numbering of integration points for outputAll elements except variable node elements
This shows the scheme in the layer closest to the 1–2–3 and 1–2–3–4 faces. The integration points in the second and third layers are numbered consecutively. Multiple layers are used for composite solid elements. For heat transfer applications a different integration scheme is used for tetrahedral and wedge elements, as described in Triangular, tetrahedral, and wedge elements. For linear triangular prisms in Abaqus/Explicit reduced integration is used; therefore, a C3D6 element and a C3D6T element have only one integration point. For the linear bricks C3D8S and C3D8HS in Abaqus/Standard improved stress visualization is obtained through a 27-point integration rule, consisting of 8 integration points at the elements' nodes, 12 integration points on the elements' edges, 6 integration points on the elements' sides, and one integration point inside the element. For the general-purpose C3D10HS 10-node tetrahedra in Abaqus/Standard improved stress visualization is obtained through an 11-point integration rule, consisting of 10 integration points at the elements' nodes and one integration point at their centroid. For acoustic tetrahedra, pyramid, and wedges in Abaqus/Standard full integration is used; therefore, an AC3D4 element has 4 integration points, an AC3D5 element has 5 integration points, an AC3D6 element has 6 integration points, an AC3D10 element has 15 integration points, and an AC3D15 element has 18 integration points. Variable node elements
This shows the scheme in the layer closest to the 1–2–3 and 1–2–3–4 faces. The integration points in the second and third layers are numbered consecutively. Multiple layers are used for composite solid elements. The face nodes do not appear.
Node 21 is located at the centroid of the element. |