This section summarizes the changes and the additions that have been made to the options that define an ABAQUS model.
| mod | (S) | *ADAPTIVE MESH CONSTRAINT |
Include the new USER parameter to enable use of user subroutine UMESHMOTION to describe adaptive mesh constraints. | ||
| new | (S)(E) | *COHESIVE SECTION |
Specify element properties for cohesive elements. | ||
| mod | (S) | *COMPLEX FREQUENCY |
The requested eigenvalues can be specified by providing the minimum and/or maximum frequency of interest. | ||
| rem | (S)(E) | *CONNECTOR CONTACT FORCE |
This option has been replaced by the more general *CONNECTOR DERIVED COMPONENT option. | ||
| new | (E) | *CONNECTOR DAMAGE EVOLUTION |
Specify connector damage evolution for connector elements. | ||
| new | (E) | *CONNECTOR DAMAGE INITIATION |
Specify connector damage initiation criteria for connector elements. | ||
| mod | (S)(E) | *CONNECTOR DAMPING |
The COUPLED parameter has been removed. Linear coupled damping behavior in connectors is invoked by simply omitting the COMPONENT parameter. Use the new INDEPENDENT COMPONENTS parameter to specify position- and motion-dependent damping. | ||
| new | (S)(E) | *CONNECTOR DERIVED COMPONENT |
Specify user-defined components in connector elements. | ||
| mod | (S)(E) | *CONNECTOR ELASTICITY |
The COUPLED parameter has been removed. Linear coupled elastic behavior in connectors is invoked by simply omitting the COMPONENT parameter. The MOTION DEPENDENCIES parameter has been replaced by the more general INDEPENDENT COMPONENTS parameter to allow for specification of position- and motion-dependent elasticity. | ||
| mod | (S)(E) | *CONNECTOR FRICTION |
The INTERACTION parameter has been removed. To refer to a friction definition, include the *FRICTION option in the connector friction definition. Include the new CONTACT FORCE parameter to refer to a contact force defined by the *CONNECTOR DERIVED COMPONENT option. | ||
| new | (S)(E) | *CONNECTOR HARDENING |
Define the plasticity initial yield value and hardening behavior in connector elements. | ||
| new | (S)(E) | *CONNECTOR PLASTICITY |
Define plasticity behavior in connector elements. | ||
| new | (S)(E) | *CONNECTOR POTENTIAL |
Specify user-defined potentials in connector elements. | ||
| new | (E) | *CONTACT CLEARANCE |
Define contact clearance properties. | ||
| new | (E) | *CONTACT CLEARANCE ASSIGNMENT |
Assign contact clearances between surfaces in the general contact domain. | ||
| mod | (E) | *CONTACT OUTPUT |
Whole surface contact force resultant variables (for example, CFT, CMT, etc.) are now available for general contact history output. Include the new SURFACE parameter to specify a surface in the general contact domain for which this output will be calculated. | ||
| new | (S)(E) | *CO-SIMULATION |
Define coupling regions and quantities to be communicated to and from another analysis process. | ||
| mod | (S)(E) | *CYCLIC HARDENING |
Use the new RATE parameter to include strain-rate effects in the isotropic component of the nonlinear isotropic/kinematic hardening model. Set this parameter equal to the value of the equivalent plastic strain rate for which this stress-strain curve applies. | ||
| new | (S)(E) | *DAMAGE EVOLUTION |
Specify material properties to define the evolution of damage. | ||
| new | (S)(E) | *DAMAGE INITIATION |
Specify material properties to define the initiation of damage. | ||
| mod | (S)(E) | *DLOAD |
Use the new CONSTANT RESULTANT parameter to specify whether surface tractions or edge loads should be integrated over the surface in the current or reference configuration. Use the new FOLLOWER parameter to specify whether a general surface traction or edge load in a large-displacement analysis should rotate with the surface or shell edge (live load) or remain fixed (dead load). Use the new ORIENTATION parameter to refer to an orientation used to specify the local coordinates in which components of general traction, shear traction, or general edge loads are specified. | ||
| new | (S)(E) | *DISTRIBUTION |
Define spatial distributions. | ||
| mod | (S)(E) | *DSLOAD |
Use the new CONSTANT RESULTANT parameter to specify whether surface tractions or edge loads should be integrated over the surface in the current or reference configuration. Use the new FOLLOWER parameter to specify whether a general surface traction or edge load in a large-displacement analysis should rotate with the surface or shell edge (live load) or remain fixed (dead load). Use the new ORIENTATION parameter to refer to an orientation used to specify the local coordinates in which components of general traction, shear traction, or general edge loads are specified. | ||
| mod | (S)(E) | *ELASTIC |
Use TYPE=TRACTION instead of TYPE=COMPOSITE BEAM to define orthotropic shear behavior for warping elements. Use TYPE=TRACTION or TYPE=COUPLED TRACTION to define the elastic traction-separation response of cohesive elements. | ||
| new | (S) | *ELEMENT PROPERTIES |
Modify element properties on an element-by-element basis. | ||
| mod | (S)(E) | *FASTENER |
Connector elements can now be used to model complex behavior in fasteners. Use the new ELSET parameter to refer to the element set containing the user-defined connector elements that will model the fastener. Use the new ELSET parameter along with the existing REFERENCE NODE SET parameter to enable ABAQUS to generate connector elements that will model the fastener. | ||
| mod | (S) | *FREQUENCY |
Include the new RESIDUAL MODES parameter to activate the calculation of residual modes based on loading patterns defined in an immediately preceding static perturbation step. The number of requested eigenvalues is not a required data item for the Lanczos eigensolver. Instead, you can specify the maximum frequency of interest. | ||
| mod | (S)(E) | *INITIAL CONDITIONS |
Include the new INTERPOLATE parameter with the FILE parameter and TYPE=TEMPERATURE to interpolate the temperature field from a heat transfer analysis with a dissimilar mesh. The new ABSOLUTE EXTERIOR TOLERANCE and EXTERIOR TOLERANCE parameters can be used with the INTERPOLATE parameter to define tolerances for the interpolation. Include the SECTION POINTS parameter with TYPE=HARDENING to specify hardening variables at individual section points through the thickness of a shell element. This option can be used only when shell properties are defined using the *SHELL SECTION option. It is not permitted when properties are defined using the *SHELL GENERAL SECTION option. | ||
| new | (E) | *INTEGRATED OUTPUT |
Specify variables integrated over a surface to be written to the output database. | ||
| new | (E) | *INTEGRATED OUTPUT SECTION |
Define an integrated output section over a surface with a local coordinate system and a reference point. | ||
| new | (S) | *MATRIX ASSEMBLE |
Define stiffness matrices for a part of the model. | ||
| new | (S) | *MATRIX INPUT |
Read in a matrix for a part of the model. | ||
| mod | (S) | *MODAL DAMPING |
Include the new DEFINITION parameter to indicate how the damped eigenmodes are chosen. Set DEFINITION=MODE NUMBERS (the default) to assign a damping coefficient to the eigenmode number. Set DEFINITION=FREQUENCY RANGE to assign a damping coefficient to frequency ranges. | ||
| new | (S)(E) | *NONSTRUCTURAL MASS |
Specify mass contribution to the model from nonstructural features. | ||
| mod | (S) | *SELECT EIGENMODES |
Include the new DEFINITION parameter to indicate how the eigenmodes are chosen. Set DEFINITION=MODE NUMBERS (the default) to select the eigenmodes by eigenmode numbers. Set DEFINITION=FREQUENCY RANGE to select the eigenmodes by frequency ranges. | ||
| mod | (S) | *STEADY STATE TRANSPORT |
Use the new ELSET parameter to specify an element set for which the rigid body motion will be described in a spatial or Eulerian manner. Include the new PASS BY PASS parameter to indicate that a quasi-steady-state (pass-by-pass) procedure will be used to obtain the steady-state solution. | ||
| mod | (S) | *SHELL SECTION |
Include the new POISSON=ELASTIC parameter to define a thickness change in shell elements based on the elastic material properties. | ||
| mod | (S) | *SHELL GENERAL SECTION |
Include the new POISSON=ELASTIC parameter to define a thickness change in shell elements based on the elastic material properties. | ||
| mod | (S) | *SUBSTRUCTURE MATRIX OUTPUT |
Include the new OUTPUT FILE parameter to specify the type of file to which output will be saved. | ||
| mod | (S)(E) | *SURFACE |
Include the new TYPE=CUTTING SURFACE parameter to generate an approximate interior cross-section surface automatically by cutting an element set region with a flat plane. The generated surface is suitable for applications such as pre-tensioning and output of the force and moment transmitted across a surface. | ||
| mod | (E) | *SURFACE PROPERTY ASSIGNMENT |
Include the new TYPE=OFFSET FRACTION parameter to control how shell offsets are treated for double-sided surfaces in the general contact algorithm. | ||
| mod | (S) | *SYMMETRIC MODEL GENERATION |
Include the new PERIODIC parameter to indicate that a periodic three-dimensional model must be generated by revolving a single three-dimensional repetitive sector of the model about the symmetry axis. If surface meshes on either side of the original sector are not matched completely, constraints between the neighboring pairs of corresponding surfaces will be established automatically when the periodic three-dimensional model is generated. | ||
| mod | (S)(E) | *TEMPERATURE |
Include the new INTERPOLATE parameter with the FILE parameter to interpolate the temperature field from a heat transfer analysis with a dissimilar mesh. The new ABSOLUTE EXTERIOR TOLERANCE and EXTERIOR TOLERANCE parameters can be used with the INTERPOLATE parameter to define tolerances for the interpolation. |