This section summarizes the changes and the additions that have been made to the options that define an Abaqus model.
| new | (S) | *ACOUSTIC CONTRIBUTION |
Request the computation of the acoustic contribution factors for the linear, eigenmode-based, steady-state dynamic procedure. | ||
| mod | (S) | *BOUNDARY |
A new value is available for the PHANTOM parameter. Set PHANTOM=INCLUDED to indicate that the boundary conditions applied to a phantom node located at an element edge will be interpolated automatically from the specified real corner nodes when the enriched element is cracked. This setting applies only to nodes with pore pressure degrees of freedom. | ||
| mod | (S) | *CFLOW |
A new value is available for the PHANTOM parameter. Set PHANTOM=INCLUDED to indicate that the pore pressure applied to a phantom node located at an element edge will be interpolated automatically from the specified real corner nodes when the enriched element is cracked. | ||
| mod | (S)(E) | *CLAY HARDENING |
Use the new TYPE parameter to specify compressive or tensile hardening data as a function of the volumetric plastic strain. Use the new SR parameter to apply softening regularization to the hardening data. | ||
| mod | (S)(E) | *DAMAGE INITIATION |
Use the new SMOOTHING parameter to use the stress/strain at the integration points directly for averaging or to assemble the stress/strain to element nodes and then interpolate to the integration points for averaging. Use the new WEIGHTING METHOD parameter to average the stress/strain with a uniform, Gaussian, cubic spline, or user-defined weight function. | ||
| mod | (S) | *DAMPING CONTROLS |
Use the new LOW FREQUENCY CUTOFF parameter to control damping of the low-frequency eigenmodes in transient modal analyses. | ||
| new | (E) | *DISCRETE ELASTICITY |
Specify effective elastic material properties for discrete particles. | ||
| mod | (E) | *DISCRETE SECTION |
Use the new CONTROLS parameter to specify the size of the particle tracking box for discrete elements. | ||
| mod | (S)(E) | *DISTRIBUTING COUPLING |
The MASS parameter has been removed. | ||
| mod | (S)(E)(C) | *DISTRIBUTION |
Use LOCATION=FACE to define a distribution on element faces. | ||
| mod | (S) | *DLOAD |
Load type PORMECHn is now available to apply a mechanical pore pressure load on coupled pore pressure elements. | ||
| mod | (S) | *DSLOAD |
Load type PORMECH is now available to apply a mechanical pore pressure load on coupled pore pressure elements. | ||
| mod | (S)(E) | *ELASTIC |
The value TYPE=ORTHOTROPIC or TYPE=ENGINEERING CONSTANTS can now be used with the critical state (clay) plasticity material model to define an orthotropic elastic response. | ||
| mod | (S) | *ELEMENT OUTPUT |
You can now specify that output be provided for all section points in beams, pipes, shells, and layered solids by including the ALLSECTIONPTS parameter. | ||
| mod | (S) | *EMBEDDED ELEMENT |
Use the new EMBED NODES parameter to specify the nodes or node set to embed in the host element. | ||
| mod | (S)(E) | *FASTENER PROPERTY |
The MASS parameter has been removed. | ||
| mod | (C) | *FLUID BOUNDARY |
The TYPE, AMPLITUDE, and DISTRIBUTION parameters have been removed. | ||
| new | (S) | *FLUID PIPE CONNECTOR LOSS |
Specify fluid pipe connector element loss. | ||
| new | (S) | *FLUID PIPE CONNECTOR SECTION |
Specify fluid pipe connector element section properties. | ||
| new | (S) | *FLUID PIPE FLOW LOSS |
Specify fluid pipe element loss. | ||
| new | (S) | *FLUID PIPE SECTION |
Specify fluid pipe element section properties. | ||
| mod | (S) | *FREQUENCY |
The default behavior for the Lanczos and subspace iteration eigensolvers is changed to use the SIM-based architecture; previously, using the non-SIM (traditional) architecture was the default behavior. Using *FREQUENCY without the SIM parameter indicates that the SIM-based architecture is required. Specify *FREQUENCY, SIM=NO to indicate that the non-SIM architecture is required. | ||
| mod | (E) | *IMPORT |
In an Abaqus/Explicit import analysis you can define new positions for the imported elements and import an element set more than once. Use the new RENAME parameter to specify new labels for the element sets to be imported from the previous analysis. Use the new EOFFSET and NOFFSET parameters to renumber the elements and nodes, respectively, in the renamed sets. New element set names and translation/rotation information can be specified on the data lines. | ||
| mod | (E) | *IMPORT ELSET |
Use the new RENAME parameter to specify new labels for the element sets to be imported from the previous analysis. | ||
| mod | (E) | *IMPORT NSET |
Use the new RENAME parameter to specify new labels for the node sets to be imported from the previous analysis. | ||
| mod | (S)(E) | *INITIAL CONDITIONS |
The value TYPE=PLASTIC STRAIN can now be used with the critical state (clay) plasticity material model to specify an initial plastic strain field. In Abaqus/Standard the material initial damage variables can now be specified on the data lines when TYPE=INITIAL GAP. | ||
| mod | (E) | *INSTANCE |
In an Abaqus/Explicit import analysis you can define a new position for an imported instance and import an instance more than once. Translation/rotation information can be specified on the data lines. | ||
| mod | (S) | *INTEGRATED OUTPUT |
This option is now available in Abaqus/Standard analyses. | ||
| mod | (S) | *INTEGRATED OUTPUT SECTION |
This option is now available in Abaqus/Standard analyses. | ||
| mod | (E) | *MASS ADJUST |
A new value is now available for the TARGET DT parameter. Set TARGET DT=MAXIMIZE to indicate that a maximum possible time increment for the elements in the sets is desired. Maximizing the time increment can also be specified for selected sets on the data lines. Settings to define mass adjustment using a scale factor can be specified on the data lines. | ||
| mod | (S) | *MATRIX OUTPUT |
The FORMAT parameter can now be set equal to DMIG to output generated matrices into a Nastran DMIG-s format (.bdf) file. | ||
| new | (S)(E) | *NETWORK STIFFNESS RATIO |
Specify stiffness ratios for viscoelastic networks. | ||
| new | (E) | *PARTICLE GENERATOR |
Specify a particle generator. | ||
| new | (E) | *PARTICLE GENERATOR FLOW |
Specify flow speed and mass flow rate per unit inlet area for a particle species. | ||
| new | (E) | *PARTICLE GENERATOR INLET |
Specify a particle generator inlet surface. | ||
| new | (E) | *PARTICLE GENERATOR MIXTURE |
Specify particle generator species mixture. | ||
| new | (S) | *PERFECTLY MATCHED LAYER |
Specify perfectly matched layer properties. | ||
| new | (S) | *PML COEFFICIENT |
Specify perfectly matched layer coefficients. | ||
| mod | (S)(E) | *POTENTIAL |
This option can now be used to define an anisotropic yield function for the clay plasticity model. | ||
| new | (E) | *PROBABILITY DENSITY FUNCTION |
Specify a probability density function. | ||
| mod | (E) | *RESTART |
The NUMBER INTERVAL parameter can now take a value of zero to turn off all restart frame output. | ||
| mod | (E) | *SECTION CONTROLS |
Use the new value ELEMENT CONVERSION=BACKGROUND GRID to convert the continuum elements to uniform distributed SPH particles. Use the new PARTICLE THICKNESS parameter to specify the particle thickness when ELEMENT CONVERSION=BACKGROUND GRID is used. Use the new SPH FORMULATION parameter to specify the SPH formulation. Use the new SPH SMOOTHING LENGTH parameter to specify if the smoothing length is constant or variable. | ||
| new | (S)(E) | *SOFTENING REGULARIZATION |
Specify softening regularization for the clay plasticity model. | ||
| new | (E) | *SPH SURFACE BEHAVIOR |
Define boundary surface interaction properties between SPH particles and Lagrangian surfaces. | ||
| new | (S) | *SUBSTRUCTURE DAMPING |
Specify mass-proportional and stiffness-proportional damping for a substructure. | ||
| new | (S) | *SUBSTRUCTURE DAMPING CONTROLS |
Specify damping controls for substructure property. | ||
| mod | (S) | *SUBSTRUCTURE GENERATE |
Use the new EIGENPROBLEM parameter to define substructure modal damping for a given substructure. | ||
| new | (S) | *SUBSTRUCTURE MODAL DAMPING |
Specify damping for a substructure property. | ||
| mod | (S)(E) | *SURFACE BEHAVIOR |
A new value is available for the PRESSURE-OVERCLOSURE parameter. Set PRESSURE-OVERCLOSURE=JKR to define a JKR-type pressure-overclosure relationship for discrete element method analysis. | ||
| mod | (S)(E) | *SURFACE PROPERTY ASSIGNMENT |
The PROPERTY parameter can now take the value VERTEX CRITERIA to control which nodes of feature edges should be considered vertex nodes in the general contact domain. |