ABAQUS Volume II: I–Z User Manual
ABAQUS Software
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Table of contents
Document Outline
- ABAQUS Version 6.6 PDF Documentation
- ABAQUS Keywords Reference Manual
- Trademarks and Legal Notices
- ABAQUS Offices and Representatives
- Preface
- Contents
- 9. I
- 9.1 * IMPEDANCE: Define impedances for acoustic analysis.
- Required, mutually exclusive parameters:
- Optional parameter:
- Data line to define an impedance for PROPERTY, NONREFLECTING = PLANAR, or NONREFLECTING = IMPROVED:
- Data line to define an absorbing boundary impedance for NONREFLECTING = CIRCULAR or NONREFLECTING = SPHERICAL:
- Data line to define an absorbing boundary impedance for NONREFLECTING = ELLIPTICAL or NONREFLECTING = PROLATE SPHEROIDAL:
- 9.2 * IMPEDANCE PROPERTY: Define the impedance parameters for an acoustic medium boundary.
- 9.3 * IMPERFECTION: Introduce geometric imperfections for postbuckling analysis.
- Optional parameters (mutually exclusive-if neither parameter is specified, ABAQUS assumes that the imperfection data will be entered directl
- Required parameter if the FILE parameter is used:
- Optional parameters if the FILE parameter is used:
- Optional parameter if the FILE parameter is omitted:
- Data lines to define the imperfection as a linear superposition of mode shapes from the results file:
- Data line to define the imperfection based on the solution of a static analysis from the results file:
- Data lines to define the imperfection if the FILE and INPUT parameters are omitted:
- 9.4 * IMPORT: Import information from a previous ABAQUS/Explicit or ABAQUS/Standard analysis.
- 9.5 * IMPORT CONTROLS: Specify tolerances used in importing model and results data.
- 9.6 * IMPORT ELSET: Import element set definitions from a previous ABAQUS/Explicit or ABAQUS/Standard analysis.
- 9.7 * IMPORT NSET: Import node set definitions from a previous ABAQUS/Explicit or ABAQUS/Standard analysis.
- 9.8 * INCIDENT WAVE: Define incident wave loading for a blast or scattering load on a boundary.
- 9.9 * INCIDENT WAVE FLUID PROPERTY: Define the fluid properties associated with an incident wave.
- 9.10 * INCIDENT WAVE INTERACTION: Define incident wave loading for a blast or scattering load on a surface.
- 9.11 * INCIDENT WAVE INTERACTION PROPERTY: Define the geometric data and fluid properties describing an incident wave.
- 9.12 * INCIDENT WAVE PROPERTY: Define the geometric data describing an incident wave.
- 9.13 * INCIDENT WAVE REFLECTION: Define the reflection load on a surface caused by incident wave fields.
- 9.14 * INCLUDE: Reference an external file containing ABAQUS input data.
- 9.15 * INCREMENTATION OUTPUT: Define output database requests for time incrementation data.
- 9.16 * INELASTIC HEAT FRACTION: Define the fraction of the rate of inelastic dissipation that appears as a heat source.
- 9.17 * INERTIA RELIEF: Apply inertia-based load balancing.
- 9.18 * INITIAL CONDITIONS: Specify initial conditions for the model.
- Required parameters:
- Optional parameters:
- Data line for TYPE = ACOUSTIC STATIC PRESSURE:
- Data lines for TYPE = CONCENTRATION:
- Data lines for TYPE = CONTACT:
- Data lines for TYPE = FIELD, VARIABLE = n:
- No data lines are required for TYPE = FIELD, VARIABLE = n, FILE = file, STEP = step, INC = inc .
- Data lines for TYPE = FLUID PRESSURE:
- Data lines to prescribe initial equivalent plastic strain or backstresses using TYPE = HARDENING if the REBAR, SECTION POINTS, and USER para
- Data lines to prescribe initial volumetric compacting plastic strain for the crushable foam model using TYPE = HARDENING:
- Data lines for TYPE = HARDENING, REBAR:
- No data lines are required for TYPE = HARDENING, USER .
- Data lines for TYPE = HARDENING, SECTION POINTS:
- Data lines for TYPE = INITIAL GAP:
- Data lines for TYPE = MASS FLOW RATE:
- Data lines to prescribe initial plastic strains using TYPE = PLASTIC STRAIN if the REBAR and SECTION POINTS parameters are omitted:
- Data lines for TYPE = PLASTIC STRAIN, REBAR:
- Data lines for TYPE = PLASTIC STRAIN, SECTION POINTS:
- Data lines for TYPE = PORE PRESSURE if the USER parameter is omitted:
- No data lines are required for TYPE = PORE PRESSURE, USER .
- Data lines for TYPE = POROSITY:
- Data lines for TYPE = PRESSURE STRESS:
- No data lines are required for TYPE = PRESSURE STRESS, FILE = file, STEP = step, INC = inc .
- Data lines for TYPE = RATIO if the USER parameter is omitted:
- No data lines are required for TYPE = RATIO, USER .
- Data lines for TYPE = REF COORDINATE:
- Data lines for TYPE = RELATIVE DENSITY:
- Data lines for TYPE = ROTATING VELOCITY:
- Data lines for TYPE = SATURATION:
- Data lines for TYPE = SOLUTION if the USER and REBAR parameters are omitted:
- Data lines for TYPE = SOLUTION, REBAR:
- No data lines are required for TYPE = SOLUTION, USER .
- Data lines for TYPE = SPECIFIC ENERGY:
- Data lines for TYPE = SPUD EMBEDMENT:
- Data lines for TYPE = SPUD PRELOAD:
- Data lines for TYPE = STRESS if the GEOSTATIC, REBAR, SECTION POINTS, and USER parameters are omitted:
- Data lines for TYPE = STRESS, GEOSTATIC:
- Data lines for TYPE = STRESS, REBAR:
- Data lines for TYPE = STRESS, SECTION POINTS:
- No data lines are required for TYPE = STRESS, USER .
- Data lines for TYPE = TEMPERATURE:
- No data lines are required for TYPE = TEMPERATURE, FILE = file, STEP = step, INC = inc .
- No data lines are required for TYPE = TEMPERATURE, MIDSIDE, FILE = file, STEP = step, INC = inc .
- No data lines are required for TYPE = TEMPERATURE, INTERPOLATE, FILE = file, STEP = step, INC = inc .
- Data lines for TYPE = VELOCITY:
- 9.19 * INSTANCE: Begin an instance definition.
- Required parameters if the instance is not imported from a previous analysis:
- Required parameter if the instance is to be imported from a previous analysis:
- Optional import parameter:
- Data line to translate an instance that is not imported from a previous analysis:
- Data lines to translate and/or rotate an instance that is not imported from a previous analysis:
- There are no data lines for an instance that is imported from a previous analysis.
- 9.20 * INTEGRATED OUTPUT: Specify variables integrated over a surface to be written to the output database.
- 9.21 * INTEGRATED OUTPUT SECTION: Define an integrated output section over a surface with a local coordinate system and a reference point.
- 9.22 * INTERACTION OUTPUT: Specify spot weld interaction variables to be written to the output database.
- 9.23 * INTERACTION PRINT: Define print requests for spot weld interaction variables.
- 9.24 * INTERFACE: Define properties for contact elements.
- Required parameter:
- Optional parameter:
- Data line for ITT -type elements:
- Data lines for ISL21A and ISL22A elements:
- Data lines for IRS -type elements for use with axisymmetric elements:
- Data line for ASI1 elements:
- Data line for ASI -type elements for use with 2-D elements:
- Data lines for ASI -type elements for use with axisymmetric elements or 3-D elements:
- 9.25 * ITS: Define properties for ITS elements.
- 9.1 * IMPEDANCE: Define impedances for acoustic analysis.
- 10. J
- 10.1 * JOINT: Define properties for JOINTC elements.
- 10.2 * JOINT ELASTICITY: Specify elastic properties for elastic-plastic joint elements.
- 10.3 * JOINT PLASTICITY: Specify plastic properties for elastic-plastic joint elements.
- 10.4 * JOINTED MATERIAL: Specify the jointed material model.
- 10.5 * JOULE HEAT FRACTION: Define the fraction of electric energy released as heat.
- 11. K
- 11.1 * KAPPA: Specify the material parameters and for mass diffusion driven by gradients of temperature and equivalent pressure stress, resp
- 11.2 * KINEMATIC: Define a kinematic coupling constraint.
- 11.3 * KINEMATIC COUPLING: Constrain all or specific degrees of freedom of a set of nodes to the rigid body motion of a reference node.
- 12. L
- 13. M
- 13.1 * MAP SOLUTION: Map a solution from an old mesh to a new mesh.
- 13.2 * MASS: Specify a point mass.
- 13.3 * MASS DIFFUSION: Transient or steady-state uncoupled mass diffusion analysis.
- 13.4 * MASS FLOW RATE: Specify fluid mass flow rate in a heat transfer analysis.
- 13.5 * MATERIAL: Begin the definition of a material.
- 13.6 * MATRIX: Read in the stiffness or mass matrix for a linear user element.
- 13.7 * MATRIX ASSEMBLE: Define stiffness or mass matrices for a part of the model.
- 13.8 * MATRIX INPUT: Read in a matrix for a part of the model.
- 13.9 * MEMBRANE SECTION: Specify section properties for membrane elements.
- 13.10 * MODAL DAMPING: Specify damping for modal dynamic analysis.
- Optional, mutually exclusive parameters:
- Optional parameter:
- Data lines to define a fraction of critical damping by specifying mode numbers ( MODAL = DIRECT and DEFINITION = MODE NUMBERS ):
- Data lines to define Rayleigh damping by specifying mode numbers ( RAYLEIGH and DEFINITION = MODE NUMBERS ):
- Data lines to define composite modal damping ( MODAL = COMPOSITE ):
- Data lines to define structural damping by specifying mode numbers ( STRUCTURAL and DEFINITION = MODE NUMBERS ):
- Data lines to define a fraction of critical damping by specifying frequency ranges ( MODAL = DIRECT and DEFINITION = FREQUENCY RANGE ):
- Data lines to define Rayleigh damping by specifying frequency ranges ( RAYLEIGH and DEFINITION = FREQUENCY RANGE ):
- Data lines to define structural damping by specifying frequency ranges ( STRUCTURAL and DEFINITION = FREQUENCY RANGE ):
- 13.11 * MODAL DYNAMIC: Dynamic time history analysis using modal superposition.
- 13.12 * MODAL FILE: Write generalized coordinate (modal amplitude) data or eigendata to the results file during a mode-based dynamic or eige
- 13.13 * MODAL OUTPUT: Write generalized coordinate (modal amplitude) data to the output database during a mode-based dynamic or complex eige
- 13.14 * MODAL PRINT: Print generalized coordinate (modal amplitude) data during a mode-based dynamic procedure.
- 13.15 * MODEL CHANGE: Remove or reactivate elements and contact pairs.
- 13.16 * MOHR COULOMB: Specify the Mohr-Coulomb plasticity model.
- 13.17 * MOHR COULOMB HARDENING: Specify hardening for the Mohr-Coulomb plasticity model.
- 13.18 * MOISTURE SWELLING: Define moisture-driven swelling.
- 13.19 * MOLECULAR WEIGHT: Define the molecular weight of an ideal gas species.
- 13.20 * MONITOR: Define a degree of freedom to monitor.
- 13.21 * MOTION: Specify motions as a predefined field.
- 13.22 * MPC: Define multi-point constraints.
- 13.23 * MULLINS EFFECT: Specify Mullins effect material parameters for elastomers.
- Optional, mutually exclusive parameters:
- Optional parameters:
- To define the material behavior by giving test data:
- Data lines to define the material constants if both the TEST DATA INPUT and USER parameters are omitted:
- Data lines to define the material properties if the USER parameter is specified:
- 13.24 * M1: Define the first bending moment behavior of beams.
- 13.25 * M2: Define the second bending moment behavior of beams.
- 14. N
- 14.1 * NCOPY: Create nodes by copying.
- 14.2 * NFILL: Fill in nodes in a region.
- 14.3 * NGEN: Generate incremental nodes.
- 14.4 * NMAP: Map nodes from one coordinate system to another.
- 14.5 * NO COMPRESSION: Introduce a compressive failure theory (tension only materials).
- 14.6 * NO TENSION: Introduce a tension failure theory (compression only material).
- 14.7 * NODAL THICKNESS: Define shell or membrane thickness at nodes.
- 14.8 * NODE: Specify nodal coordinates.
- 14.9 * NODE FILE: Define results file requests for nodal data.
- 14.10 * NODE OUTPUT: Define output database requests for nodal data.
- One of the following mutually exclusive parameters is required when the * NODE OUTPUT option is used in conjunction with the * OUTPUT, HISTO
- Optional parameters when the * NODE OUTPUT option is used in conjunction with the * OUTPUT, FIELD option:
- Optional parameter:
- Data lines to request nodal output:
- 14.11 * NODE PRINT: Define print requests for nodal variables.
- 14.12 * NODE RESPONSE: Define nodal responses for design sensitivity analysis.
- 14.13 * NONSTRUCTURAL MASS: Specify mass contribution to the model from nonstructural features.
- 14.14 * NORMAL: Specify a particular normal direction.
- 14.15 * NSET: Assign nodes to a node set.
- 15. O
- 15.1 * ORIENTATION: Define a local axis system for material or element property definition, for kinematic coupling constraints, for free dir
- Required parameter:
- Optional parameters:
- Data lines to define an orientation using DEFINITION = COORDINATES:
- Data lines to define an orientation using DEFINITION = NODES:
- Data lines to define an orientation using DEFINITION = OFFSET TO NODES:
- To define an orientation using a user subroutine ( SYSTEM = USER ):
- 15.2 * ORNL: Specify constitutive model developed by Oak Ridge National Laboratory.
- 15.3 * OUTPUT: Define output requests to the output database.
- Using * OUTPUT in an ABAQUS/Standard analysis
- Using * OUTPUT in an ABAQUS/Explicit analysis
- One of the following mutually exclusive parameters is required:
- The following parameters are optional and valid only if the FIELD parameter is included:
- The following parameters are optional and valid only if the HISTORY parameter is included:
- The following parameters are optional and valid only if the FIELD or HISTORY parameter is included:
- 15.1 * ORIENTATION: Define a local axis system for material or element property definition, for kinematic coupling constraints, for free dir
- 16. P, Q
- 16.1 * PARAMETER: Define parameters for input parametrization.
- 16.2 * PARAMETER DEPENDENCE: Define dependence table for tabularly dependent parameters.
- 16.3 * PARAMETER SHAPE VARIATION: Define parametric shape variations.
- Required parameter:
- Optional parameters (mutually exclusive-if neither parameter is specified, ABAQUS assumes that the shape variation data will be entered dire
- Required parameter if the FILE parameter is used:
- Optional parameters if the FILE parameter is used:
- Optional parameter if the FILE parameter is omitted:
- Data lines to define the shape variation if the FILE and INPUT parameters are omitted:
- 16.4 * PART: Begin a part definition.
- 16.5 * PERIODIC: Define periodic symmetry for a cavity radiation heat transfer analysis.
- 16.6 * PERMEABILITY: Define permeability for pore fluid flow.
- Optional parameters:
- Required parameter when fully saturated material properties are defined:
- Data lines to define fully saturated isotropic permeability ( TYPE = ISOTROPIC ):
- Data lines to define fully saturated orthotropic permeability ( TYPE = ORTHOTROPIC ):
- Data lines to define fully saturated anisotropic permeability ( TYPE = ANISOTROPIC ):
- Data lines to define the dependence of permeability on saturation of the wetting liquid, k s (s) ( TYPE = SATURATION ):
- Data lines to define the velocity coefficient, β (e) ( TYPE = VELOCITY ):
- 16.7 * PHYSICAL CONSTANTS: Specify physical constants.
- 16.8 * PIEZOELECTRIC: Specify piezoelectric material properties.
- 16.9 * PIPE-SOIL INTERACTION: Specify element properties for pipe-soil interaction elements.
- 16.10 * PIPE-SOIL STIFFNESS: Define constitutive behavior for pipe-soil interaction elements.
- Optional parameters:
- The following optional parameters can be used only in combination with TYPE = USER:
- Data lines to define linear constitutive behavior ( TYPE = LINEAR ):
- Data lines to define nonlinear constitutive behavior ( TYPE = NONLINEAR ):
- Data lines to define constitutive behavior using the ASCE formula for sand in the axial direction ( TYPE = SAND, DIRECTION = AXIAL ):
- Data lines to define constitutive behavior using the ASCE formula for clay in the axial direction ( TYPE = CLAY, DIRECTION = AXIAL ):
- Data lines to define constitutive behavior using the ASCE formula for sand in the vertical direction ( TYPE = SAND, DIRECTION = VERTICAL ):
- Data lines to define constitutive behavior using the ASCE formula for clay in the vertical direction ( TYPE = CLAY, DIRECTION = VERTICAL ):
- Data lines to define constitutive behavior using the ASCE formula for sand in the horizontal direction ( TYPE = SAND, DIRECTION = HORIZONTAL
- Data lines to define constitutive behavior using the ASCE formula for clay in the horizontal direction ( TYPE = CLAY, DIRECTION = HORIZONTAL
- Data lines if the constitutive behavior is defined in user subroutine UMAT ( TYPE = USER ):
- 16.11 * PLANAR TEST DATA: Used to provide planar test (or pure shear) data (compression and/or tension).
- 16.12 * PLASTIC: Specify a metal plasticity model.
- Optional parameter:
- Optional parameter for use with HARDENING = ISOTROPIC or HARDENING = COMBINED:
- Optional parameter for use with HARDENING = ISOTROPIC:
- Optional parameter for use with HARDENING = COMBINED:
- Optional parameter for use with HARDENING = USER:
- Data lines for HARDENING = ISOTROPIC or HARDENING = COMBINED with DATA TYPE = HALF CYCLE:
- Data lines for HARDENING = COMBINED with DATA TYPE = STABILIZED:
- Data lines for HARDENING = COMBINED with DATA TYPE = PARAMETERS:
- Data lines for HARDENING = KINEMATIC:
- Data line for HARDENING = JOHNSON COOK:
- Data lines for HARDENING = USER with PROPERTIES:
- 16.13 * PLASTIC AXIAL: Define plastic axial force for frame elements.
- 16.14 * PLASTIC M1: Define the first plastic bending moment behavior for frame elements.
- 16.15 * PLASTIC M2: Define the second plastic bending moment behavior for frame elements.
- 16.16 * PLASTIC TORQUE: Define the plastic torsional moment behavior for frame elements.
- 16.17 * POROUS BULK MODULI: Define bulk moduli for soils and rocks.
- 16.18 * POROUS ELASTIC: Specify elastic material properties for porous materials.
- 16.19 * POROUS FAILURE CRITERIA: Define porous material failure criteria for a * POROUS METAL PLASTICITY model.
- 16.20 * POROUS METAL PLASTICITY: Specify a porous metal plasticity model.
- 16.21 * POST OUTPUT: Postprocess for output from the restart file.
- 16.22 * POTENTIAL: Define an anisotropic yield/creep model.
- 16.23 * PREPRINT: Select printout for the analysis input file processor.
- 16.24 * PRESSURE PENETRATION: Specify pressure penetration loads with surface-based contact.
- 16.25 * PRESSURE STRESS: Specify equivalent pressure stress as a predefined field for a mass diffusion analysis.
- Optional parameters for using the data line format:
- Required parameter for reading equivalent pressure stresses from the results file:
- Optional parameters for reading equivalent pressure stresses from the results file:
- Required parameter for defining data in user subroutine UPRESS:
- Data lines to define pressures using the data line format:
- To read pressures from an ABAQUS/Standard results file ( FILE ):
- Data lines to define equivalent pressure stresses using user subroutine UPRESS:
- 16.26 * PRESTRESS HOLD: Keep rebar prestress constant during initial equilibrium solution.
- 16.27 * PRE-TENSION SECTION: Associate a pre-tension node with a pre-tension section.
- 16.28 * PRINT: Request or suppress output to the message file in an ABAQUS/Standard analysis or to the status file in an ABAQUS/Explicit ana
- 16.29 * PSD-DEFINITION: Define a cross-spectral density frequency function for random response loading.
- 17. R
- 17.1 * RADIATE: Specify radiation conditions in heat transfer analyses.
- 17.2 * RADIATION FILE: Define results file requests for cavity radiation heat transfer.
- 17.3 * RADIATION OUTPUT: Define output database requests for cavity radiation variables.
- 17.4 * RADIATION PRINT: Define print requests for cavity radiation heat transfer.
- 17.5 * RADIATION SYMMETRY: Define cavity symmetries for radiation heat transfer analysis.
- 17.6 * RADIATION VIEWFACTOR: Control cavity radiation and viewfactor calculations.
- 17.7 * RANDOM RESPONSE: Calculate response to random loading.
- 17.8 * RATE DEPENDENT: Define a rate-dependent viscoplastic model.
- 17.9 * RATIOS: Define anisotropic swelling.
- 17.10 * REBAR: Define rebar as an element property.
- Required parameters:
- Optional parameters:
- Data lines to define rebar in beam elements:
- Data lines to define isoparametric rebar in three-dimensional shell elements:
- Data lines to define isoparametric rebar in three-dimensional membrane elements:
- Data lines to define skew rebar in three-dimensional shell elements:
- Data lines to define skew rebar in three-dimensional membrane elements:
- Data lines to define rebar in axisymmetric shell elements:
- Data lines to define rebar in axisymmetric membrane elements:
- Data lines to define a layer of uniformly spaced rebar in continuum elements ( SINGLE parameter omitted) when the layer is parallel to two i
- Data lines to define a layer of uniformly spaced rebar in continuum elements ( SINGLE parameter omitted) when the layer is parallel to only
- Data lines to define a single rebar in continuum elements ( SINGLE parameter included):
- 17.11 * REBAR LAYER: Define layers of reinforcement in membrane, shell, surface, and continuum elements.
- 17.12 * REFLECTION: Define reflection symmetries for a cavity radiation heat transfer analysis.
- 17.13 * RELEASE: Release rotational degrees of freedom at one or both ends of a beam element.
- 17.14 * RESPONSE SPECTRUM: Calculate the response based on user-supplied response spectra.
- 17.15 * RESTART: Save and reuse data and analysis results.
- 17.16 * RETAINED EIGENMODES: Select the modes to be retained in a substructure generation analysis.
- 17.17 * RETAINED NODAL DOFS: Specify the degrees of freedom that are to be retained as external to a substructure.
- 17.18 * RIGID BODY: Define a set of elements as a rigid body and define rigid element properties.
- Required parameter:
- Optional parameters:
- Optional parameters (use only when the element set specified contains rigid elements):
- There are no data lines associated with this option in an ABAQUS/Standard analysis.
- Data line for R2D2, RB2D2, and RB3D2 elements in an ABAQUS/Explicit analysis:
- Data line for RAX2, R3D3, and R3D4 elements in an ABAQUS/Explicit analysis:
- 17.19 * RIGID SURFACE: Define an analytical rigid surface.
- Required parameters:
- Optional parameter:
- No data lines are needed for TYPE = USER .
- Data lines to define surfaces created with TYPE = SEGMENTS:
- Data lines to define surfaces created with TYPE = CYLINDER:
- Data lines to define surfaces created with TYPE = REVOLUTION:
- Data lines that define the line segments that form the rigid surface for TYPE = SEGMENTS, TYPE = CYLINDER, and TYPE = REVOLUTION:
- 17.20 * ROTARY INERTIA: Define rigid body rotary inertia.
- 18. S
- 18.1 * SECTION CONTROLS: Specify section controls.
- 18.2 * SECTION FILE: Define results file requests of accumulated quantities on user-defined surface sections.
- 18.3 * SECTION ORIGIN: Define a meshed cross-section origin.
- 18.4 * SECTION POINTS: Locate points in the beam section for which stress and strain output are required.
- Data lines to locate section points for output when used in conjunction with the * BEAM GENERAL SECTION option and a predefined library sect
- Data lines to locate elements and integration point numbers for meshed sections when used in conjunction with the * BEAM GENERAL SECTION, SE
- Data lines to locate elements and integration point numbers in the cross-section model when used in conjunction with the * BEAM SECTION GENE
- 18.5 * SECTION PRINT: Define print requests of accumulated quantities on user-defined surface sections.
- 18.6 * SELECT CYCLIC SYMMETRY MODES: Specify the cyclic symmetry modes in an eigenvalue analysis of a cyclic symmetric structure.
- 18.7 * SELECT EIGENMODES: Select the modes to be used in a modal dynamic analysis.
- 18.8 * SFILM: Define film coefficients and associated sink temperatures over a surface for heat transfer analysis.
- 18.9 * SFLOW: Define seepage coefficients and associated sink pore pressures normal to a surface.
- 18.10 * SHEAR CENTER: Define the position of the shear center of a beam section.
- 18.11 * SHEAR FAILURE: Specify a shear failure model and criterion.
- 18.12 * SHEAR RETENTION: Define the reduction of the shear modulus associated with crack surfaces in a * CONCRETE model as a function of the
- 18.13 * SHEAR TEST DATA: Used to provide shear test data.
- 18.14 * SHELL GENERAL SECTION: Define a general, arbitrary, elastic shell section.
- Required parameter:
- Required parameter in ABAQUS/Explicit, optional parameter in ABAQUS/Standard:
- Optional parameters:
- The following parameters are optional, mutually exclusive, and used only if the section is not defined by its general stiffness on the data
- The following optional parameter can be used only in combination with the MATERIAL, the COMPOSITE, or the USER parameter:
- The following optional parameters can be used only in combination with the USER parameter:
- Optional parameter for use when the MATERIAL, the COMPOSITE, and the USER parameters are omitted:
- Data line if the MATERIAL parameter is included:
- Data lines if the COMPOSITE parameter is included:
- Data lines to define the shell section if the MATERIAL, the COMPOSITE, and the USER parameters are omitted:
- Data lines if the USER parameter is included:
- 18.15 * SHELL SECTION: Specify a shell cross-section.
- 18.16 * SHELL TO SOLID COUPLING: Define a surface-based coupling between a shell edge and a solid face.
- 18.17 * SIMPEDANCE: Define impedances of acoustic surfaces.
- Required, mutually exclusive parameters:
- Optional parameter:
- Data line to define an impedance for PROPERTY, NONREFLECTING = PLANAR, or NONREFLECTING = IMPROVED:
- Data line to define an absorbing boundary impedance for NONREFLECTING = CIRCULAR or NONREFLECTING = SPHERICAL:
- Data line to define an absorbing boundary impedance for NONREFLECTING = ELLIPTICAL or NONREFLECTING = PROLATE SPHEROIDAL:
- 18.18 * SIMPLE SHEAR TEST DATA: Used to provide simple shear test data.
- 18.19 * SLIDE LINE: Specify slide line surfaces on which deformable structures may interact.
- 18.20 * SLOAD: Apply loads to a substructure.
- 18.21 * SOILS: Effective stress analysis for fluid-filled porous media.
- 18.22 * SOLID SECTION: Specify element properties for solid, infinite, acoustic, and truss elements.
- 18.23 * SOLUBILITY: Specify solubility.
- 18.24 * SOLUTION TECHNIQUE: Specify alternative solution methods.
- 18.25 * SOLVER CONTROLS: Specify controls for the iterative linear solver.
- 18.26 * SORPTION: Define absorption and exsorption behavior.
- 18.27 * SPECIFIC HEAT: Define specific heat.
- 18.28 * SPECTRUM: Define a response spectrum.
- 18.29 * SPRING: Define spring behavior.
- Required parameter if the behavior of spring elements is being defined:
- Optional parameters:
- Data lines to define linear spring behavior for SPRINGA or ITS elements:
- Data lines to define nonlinear spring behavior for SPRINGA or ITS elements:
- Data lines to define linear spring behavior for SPRING1, SPRING2, or JOINTC elements:
- Data lines to define nonlinear spring behavior for SPRING1, SPRING2, or JOINTC elements:
- 18.30 * SRADIATE: Specify surface radiation conditions in heat transfer analysis.
- 18.31 * STATIC: Static stress/displacement analysis.
- 18.32 * STEADY STATE CRITERIA: Specify steady-state criteria for terminating a quasi-static uni-directional simulation.
- 18.33 * STEADY STATE DETECTION: Specify steady-state requirements for terminating a quasi-static uni-directional simulation.
- 18.34 * STEADY STATE DYNAMICS: Steady-state dynamic response based on harmonic excitation.
- 18.35 * STEADY STATE TRANSPORT: Steady-state transport analysis.
- 18.36 * STEP: Begin a step.
- 18.37 * SUBMODEL: Specify driven boundary nodes in submodeling analysis.
- 18.38 * SUBSTRUCTURE COPY: Copy a substructure definition.
- 18.39 * SUBSTRUCTURE DELETE: Remove a substructure from the substructure library.
- 18.40 * SUBSTRUCTURE DIRECTORY: List information about the substructures on a substructure library.
- 18.41 * SUBSTRUCTURE GENERATE: Substructure generation analysis.
- 18.42 * SUBSTRUCTURE LOAD CASE: Begin the definition of a substructure load case.
- 18.43 * SUBSTRUCTURE MATRIX OUTPUT: Write a substructure's recovery matrix, reduced stiffness matrix, mass matrix, load case vectors, and gr
- 18.44 * SUBSTRUCTURE PATH: Enter into a substructure to obtain output or return back from a previously entered substructure.
- 18.45 * SUBSTRUCTURE PROPERTY: Translate, rotate, and/or reflect substructures.
- 18.46 * SURFACE: Define a surface or region in a model.
- Required parameter:
- Required parameter for cavity radiation simulations:
- Optional parameters:
- Additional optional parameters used for contact pair analyses in ABAQUS/Explicit:
- Data lines for COMBINE = UNION:
- Data line for COMBINE = INTERSECTION or COMBINE = DIFFERENCE:
- Data lines to define a surface when the CROP parameter is included:
- Data lines to define a surface using elements or element sets when the TYPE = ELEMENT parameter is used:
- Data lines to define a surface using nodes or node sets when the TYPE = NODE parameter is used:
- Data lines to define a surface using a plane cutting through the given element sets when the TYPE = CUTTING SURFACE parameter is used:
- No data lines are needed for TYPE = USER .
- Data lines to define surfaces created with TYPE = SEGMENTS:
- Data lines to define surfaces created with TYPE = CYLINDER:
- Data lines to define surfaces created with TYPE = REVOLUTION:
- Data lines that define the line segments that form the analytical surface for TYPE = SEGMENTS, TYPE = CYLINDER, and TYPE = REVOLUTION:
- 18.47 * SURFACE BEHAVIOR: Define alternative pressure-overclosure relationships for contact.
- Optional, mutually exclusive parameters:
- Optional parameters:
- Optional data line for AUGMENTED LAGRANGE and PENALTY:
- Data line for PRESSURE-OVERCLOSURE = EXPONENTIAL:
- Data line for PRESSURE-OVERCLOSURE = LINEAR:
- Data line for PRESSURE-OVERCLOSURE = SCALE FACTOR:
- Data lines for PRESSURE-OVERCLOSURE = TABULAR:
- 18.48 * SURFACE FLAW: Define geometry of surface flaws.
- 18.49 * SURFACE INTERACTION: Define surface interaction properties.
- Required parameter:
- Optional parameters:
- Optional parameters if the USER parameter is used:
- Optional data line for two-dimensional models in ABAQUS/Standard or for contact pairs involving node-based surfaces in ABAQUS/Standard, if t
- Data lines to define the surface interaction in an ABAQUS/Standard analysis if the USER parameter is used:
- Data lines to define the surface interaction in an ABAQUS/Explicit analysis if the PROPERTIES parameter is used:
- 18.50 * SURFACE PROPERTY: Define surface properties for cavity radiation.
- 18.51 * SURFACE PROPERTY ASSIGNMENT: Assign surface properties to a surface for the general contact algorithm.
- 18.52 * SURFACE SECTION: Specify section properties for surface elements.
- 18.53 * SWELLING: Specify time-dependent volumetric swelling.
- 18.54 * SYMMETRIC MODEL GENERATION: Create a three-dimensional model from an axisymmetric or partial three-dimensional model.
- Required, mutually exclusive parameters:
- Optional parameters:
- Data lines if each generated sector in the periodic model has a constant angle ( PERIODIC = CONSTANT ):
- Data lines if each generated sector in the periodic model has a variable angle ( PERIODIC = VARIABLE ):
- Data line if REFLECT = LINE:
- Data lines if REFLECT = PLANE:
- Data lines if the REVOLVE parameter is included:
- 18.55 * SYMMETRIC RESULTS TRANSFER: Import results from an axisymmetric or partial three-dimensional analysis.
- 18.56 * SYSTEM: Specify a local coordinate system in which to define nodes.
- 19. T
- 19.1 * TEMPERATURE: Specify temperature as a predefined field.
- Optional parameters for using the data line format:
- Required parameter for reading temperatures from the results or output database file:
- Optional parameters for reading temperatures from the results or output database file:
- Required parameter for defining data in user subroutine UTEMP:
- Data lines to define gradients of temperature in beams and shells:
- Data lines to define temperatures at temperature points in beams and shells:
- Data lines to define temperatures for solid or frame elements using the data line format:
- To read temperatures from an ABAQUS results or output database file:
- Data lines to define temperatures using user subroutine UTEMP:
- 19.2 * TENSILE FAILURE: Specify a tensile failure model and criterion.
- 19.3 * TENSION STIFFENING: Define the retained tensile stress normal to a crack in a * CONCRETE model.
- 19.4 * THERMAL EXPANSION: Define the thermal expansion behavior of beams.
- 19.5 * TIE: Define surface-based tie and cyclic symmetry constraints or coupled acoustic-structural interactions.
- 19.6 * TIME POINTS: Specify time points at which data are written to the output database or restart files, or specify time points in the loa
- 19.7 * TORQUE: Define the torsional behavior of beams.
- 19.8 * TORQUE PRINT: Print a summary of the total torque that can be transmitted across axisymmetric slide lines.
- 19.9 * TRACER PARTICLE: Define tracer particles for tracking the location of and results at material points during a step.
- 19.10 * TRANSFORM: Specify a local coordinate system at nodes.
- 19.11 * TRANSPORT VELOCITY: Specify angular transport velocity.
- 19.12 * TRANSVERSE SHEAR STIFFNESS: Define transverse shear stiffness for beams and shells.
- 19.13 * TRIAXIAL TEST DATA: Provide triaxial test data.
- 19.14 * TRS: Used to define temperature-time shift for time history viscoelastic analysis.
- 19.1 * TEMPERATURE: Specify temperature as a predefined field.
- 20. U
- 20.1 * UEL PROPERTY: Define property values to be used with a user element type.
- Required parameter:
- Optional parameters (relevant only for direct-integration dynamic analysis with linear user elements):
- To define the properties of linear user elements:
- Data lines to define the properties of nonlinear user elements if the PROPERTIES and/or I PROPERTIES parameters are used on the * USER ELEME
- 20.2 * UNDEX CHARGE PROPERTY: Define an UNDEX charge for incident waves.
- 20.3 * UNIAXIAL TEST DATA: Used to provide uniaxial test data (compression and/or tension).
- 20.4 * USER DEFINED FIELD: Redefine field variables at a material point.
- 20.5 * USER ELEMENT: Introduce a user-defined element type.
- 20.6 * USER MATERIAL: Define material constants for use in subroutine UMAT, UMATHT, or VUMAT .
- 20.7 * USER OUTPUT VARIABLES: Specify number of user variables.
- 20.1 * UEL PROPERTY: Define property values to be used with a user element type.
- 21. V
- 21.1 * VARIABLE MASS SCALING: Specify mass scaling during the step.
- 21.2 * VIEWFACTOR OUTPUT: Write radiation viewfactors to the results file in cavity radiation heat transfer analysis.
- 21.3 * VISCO: Transient, static, stress/displacement analysis with time-dependent material response (creep, swelling, and viscoelasticity).
- 21.4 * VISCOELASTIC: Specify dissipative behavior for use with elasticity.
- Required, mutually exclusive parameters:
- Optional parameters:
- Optional parameters when test data are given to define time domain viscoelasticity with TIME = CREEP TEST DATA or TIME = RELAXATION TEST DAT
- Data line to define continuum material properties for FREQUENCY = FORMULA:
- Data lines to define continuum material properties for FREQUENCY = TABULAR without the PRELOAD parameter or for TIME =FREQUENCY DATA:
- Data lines to define continuum material properties for FREQUENCY = TABULAR, PRELOAD = UNIAXIAL:
- Data lines to define continuum material properties for FREQUENCY = TABULAR, PRELOAD = VOLUMETRIC:
- Data lines to specify continuum material properties with the Prony series parameters directly using TIME = PRONY or FREQUENCY = PRONY:
- To specify viscoelastic behavior via test data:
- Data lines to define effective thickness-direction gasket properties for PRELOAD = UNIAXIAL:
- Data lines to define effective thickness-direction gasket properties if PRELOAD = UNIAXIAL is not included:
- 21.5 * VISCOUS: Specify viscous material properties for the two-layer viscoplastic model.
- 21.6 * VOID NUCLEATION: Define the nucleation of voids in a porous material.
- 21.7 * VOLUMETRIC TEST DATA: Provide volumetric test data.
- 22. W, X, Y, Z
- 22.1 * WAVE: Define gravity waves for use in immersed structure calculations.
- Optional parameters:
- Optional parameter for TYPE = AIRY:
- Required parameter for TYPE = GRIDDED:
- Optional parameters for TYPE = GRIDDED:
- Optional parameter for TYPE = USER:
- Data line to define Stokes fifth-order waves ( TYPE = STOKES ):
- Data lines to define Airy waves ( TYPE = AIRY ):
- Data line to define gridded wave data ( TYPE = GRIDDED ):
- Data line to define frequency versus wave amplitude data for stochastic user wave theory ( TYPE = USER ):
- 22.2 * WIND: Define wind velocity profile for wind loading.
- 22.1 * WAVE: Define gravity waves for use in immersed structure calculations.
- ABAQUS Keywords Reference Manual