Properties

Property entities are used to define and store 1D, 2D, and 3D property definitions for a model. Properties are created, edited, deleted, and shown under the Property folder within the Model browser. Properties also have a property view within the Model browser.

Properties do not have a display state, but they do have a "by property" visualization color mode which colors the model according to the colors assigned to each property based on element property relationships. The "by property" visualization color mode is automatically set when you enter the property view within the Model browser. In addition, you can manually set the "by property" visualization color mode using the element color mode icon on the Model browser toolbar. Element property relationships are user profile (solver interface) dependent and are described in the section Element Property and Material Assignment Rules. In general, when a component is assigned a property, that property assignment is applied to all elements collected by that component. The method of assigning properties at the component level is therefore referred to as indirect property assignment. Direct property assignment is performed directly on the elements themselves. Direct property assignments always take precedence over indirect property assignments.

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Properties have an active and export state. The active state of a property controls the listing of the property in the Model browser and any of its views. If a property entity is active, then it is listed in the Model browser and any of its views. If a property entity is inactive, then it is not listed in the Model browser or any of its views.

The export state of a property entity controls whether or not that property is exported when the custom export option is utilized. The all export option is not affected by the export state of a property. The active and export states of property entities can be controlled using the Entity State browser.

The data names associated with properties can be found in the data names section of the HyperMesh Reference Guide.

Solver Card Support for Properties

RADIOSS (Block Format) has many properties and most of them are supported. In addition RADIOSS allows you to program your own properties (mostly for springs) that can be used in a simulation. In order to handle the unsupported and user defined RADIOSS properties, a separate card image called "PROP_UNSUPPORTED" has been introduced.

Any unsupported property will be read with card image PROP_UNSUPPORTED with its ID and its associativity with component preserved. You can also create the property in Engineering Solutions as well. In this card image, all property sub-options, parameters, and data lines are supported as simple text. Engineering Solutions does not check the validity or syntax of any data in this mode. You must manually check the validity of the data. No editing, updating, or review of the property data is intended. Also time step calculation, mass calculation, penetration check are not available for the component that refers to this property. The property is displayed in the Model browser, Solver browser, and in the Component table.

The supported RADIOSS starter cards in RADIOSS (Block Format) 5.1, 9.0, 10.0 and 11.0 are listed below. You can quickly create these cards by right-clicking in the Solver browser and selecting Create Cards.

Supported Card	Solver Description	Supported Parameters	Notes
/ADMESH/SET	Describes the adaptive meshing.
/DAMP/	Defines the Rayleigh mass and stiffness damping coefficients applied to a set of nodes.
/EOS/GRUNEISEN	Describes the Gruneisen equation of state
/EOS/POLYNOMIAL	Describes the Linear polynomial equation of state P.
/EOS/PUFF	Describes the linear polynomial equation of state P.
/EOS/SESAME	Describes the SESAME table equation of state.
/EOS/TILLOTSON	Describes the Tillotson equation of state.
/FAIL/	Describes the failure models.
/FAIL/CHANG	Describes the Chang failure model.
/FAIL/CONNECT	Failure for solid elements used to model welds.
/FAIL/ENERGY	Describes the specific energy failure model.
/FAIL/FLD	Describes the forming limit.
/FAIL/HASHIN	Describes the Hashin failure model.
/FAIL/JOHNSON	Describes the failure criteria by Johnson-Cook failure model.
/FAIL/LAD_DAMA	Describes the Ladeveze failure model
/FAIL/PUCK	Describes the Puck failure model
/FAIL/SPALLING	Describes the Spalling and Johnson-Cook failure model.
/FAIL/TAB1	Describes the strain failure model based on damage accumulation using user-defined functions.
/FAIL/TBUTCHER	Describes the Tuler-TBUTCHER model.
/FAIL/TENSSTRAIN	Describes the strain failure model.
/FAIL/USERi (USER 1, 2, 3)	Describes the user failure model.
/FAIL/WIERZBICKI	Describes the BAO-XUE-Wierzbicki failure model.
/FAIL/WILKINS	Describes the Wilkins failure model.
/FAIL/XFEM	Describes the XFEM (eXtended Finite Element Method) failure model.
/LEAK/MAT	Defines the parameters to compute an effective leakage area.
/PROP	Describes the property sets.
/PROP/BEAM (TYPE3)	Describes the beam property set.
/PROP/CONNECT (TYPE43)	Property for solid elements used to model welds.
/PROP/FLUID (TYPE14)	Describes the general fluid property set.
/PROP/INJECT1	Describes mass injected for each constituent gas.
/PROP/INJECT2	Describes molar fraction injected for each constituent gas and total mass injected.
/PROP/INT_BEAM (TYPE18)	Describes the integrated beam property set.
/PROP/KJOINT (TYPE33)	Describes the joint type spring.
/PROP/KJOINT2 (TYPE45)	Describes the joint type spring.
/PROP/PLY (TYPE19)	Defines the ply property set used in ply-based composite definition.
/PROP/POROUS (TYPE15)	Describes the porous solid element property set (extended Darcy's law).
/PROP/RIVET (TYPE5)	Describes the rivet property set.
/PROP/SH_COMP (TYPE10)	Defines the composite shell property set.
/PROP/SH_FABR (TYPE16)	Defines the anisotropic layered shell property set
/PROP/SH_ORTH (TYPE9)	Defines the orthotropic shell property.
/PROP/SH_PLY (TYPE19)	This property set is used to define the ply property set used in ply-based composite definition.
/PROP/SH_SANDW (TYPE11)	Defines the sandwich shell property set.
/PROP/SHELL (TYPE1)	Describes the shell property set.	RADIOSS_COMMENT_FLAG
/PROP/SOL_ORTH (TYPE6)	Describes the orthotropic solid property set.
/PROP/SOLID (TYPE14)	Defines the general solid property set.
/PROP/SPH	Describes SPH property set.
/PROP/SPR_AXI (TYPE25)	Defines the axisymmetric spring property set.
/PROP/SPR_BEAM (TYPE13)	Describes the beam type spring property set.
/PROP/SPR_CRUS (TYPE44)	Represents a simple macro model of a crushable frame in compression, tension, torsion and bending.
/PROP/SPR_GENE (TYPE8)	Describes the general spring property set.
/PROP/SPR_PRE (TYPE32)	Describes the pre-tension spring property set.
/PROP/SPR_PUL (TYPE12)	Describes the pulley spring property set.
/PROP/SPR_TAB (TYPE26)
/PROP/SPRING (TYPE4)	Defines the spring property set.
/PROP/STACK (TYPE17)	This property set is used to define the sandwich shell property set.
/PROP/TRUSS (TYPE2)	Defines the truss property set.
/PROP/TSH_COMP (TYPE22)	Define the composite thick shell property set.
/PROP/TSH_ORTH (TYPE21)	Defines the orthotropic thick shell property set.
/PROP/TSHELL (TYPE20)	Defines the general thick shell property set.
/PROP/USER	User defined property		type = line
/PROP/VOID (TYPE0)	Defines the void property set.
/THERM_STRESS/MAT	Add thermal expansion property for RADIOSS material (shell and solid).

The property data cards for OptiStruct can be created by loading and editing card images into property collectors. Properties can be assigned to components or elements.

Supported Card	Solver Description	Supported Parameters	Notes
HM_ELAS	Defines properties for a HM_Spring element, as explained in Using HM_ELAS.	DOF GE S
PAABSF	Defines the properties of a frequency-dependent acoustic absorber element.
PAXI	Defines the properties of axisymmetric elements.		Referenced by CTAXI.
PBAR	Defines the properties of a simple beam (bar), which is used to create bar elements via the CBAR entry.	CONT1 PBARX
PBARL	Defines the properties of a simple beam (bar) by cross-sectional dimensions, which is used to create bar elements via the CBAR entry.	PBARX	Exported in large field format by optistructlf template.
PBEAM	Defines the properties of a beam that is used to create beam elements via the CBEAM entry.	CONTINUATION LINE 2 CONTINUATION LINE 5 CONTINUATION LINE 6 PBEAMX	Exported in large field format by optistructlf template.
PBEAML	Defines the properties of a beam element by cross-sectional dimensions that are used to create beam elements via the CBEAM entry.		Exported in large field format by optistructlf template.
PBUSH	Defines the nominal property values for a generalized spring-and-damper structural element.	K_LINE B_LINE GE_LINE M_LINE PBUSHT
PBUSH1D	Property with Springs_Gaps ID pool.	SPRING_LINE
PCOMP	Defines the structure and properties of an n-ply composite laminate material.	Z0 OPTIONS Number_of_Plies PCOMPX	Exported in large field format by optistructlf template.
PCOMPG	Defines the structure and properties of an n-ply composite laminate, allowing for global ply identification.	Z0 OPTIONS Number_of_Plies PCOMPX	Exported in large field format by optistructlf template.
PCOMPP	Defines the properties of a composite laminate material used in ply-based composite definition.	Z0 OPTIONS Number_of_Plies PCOMPX	Exported in large field format by optistructlf template.
PCONT	Defines properties of a contact interface.	GPAD_OPT STIFF_REAL_VAL MU1 Options MU2 CLEARANCE FRICESL_opts PCONTX PCONTHT
PCONTX	Defines properties of a CONTACT interface for geometric nonlinear analysis
PDAMP	Specifies the damping of a scalar damper element using defined CDAMP1 or CDAMP3 entry.
PELAS	Used to define the stiffness and stress coefficient of a scalar elastic element (spring) by means of the CELAS1 or CELAS3 entry.	PELAST
PFAST	Defines properties of fastener (CFAST) elements.	MCID_OPT
PGAP	Defines properties of the gap (CGAP or CGAPG) elements.	U0_opts (AUTO) KA_opts (AUTO, SOFT, HARD) KT_opts (AUTO) MU1_opts (STICK, FREEZE) CONT PGAPHT
PGASK	Defines the properties for solid gasket elements.	CORDM options (Blank, -1, User)
PLSOLID	Defines the properties of nonlinear hyperelastic solid elements, referenced by CHEXA, CPENTA, and CTETRA bulk data entries.
PMASS	Defines the mass value of a scalar mass element (CMASS1 or CMASS3 entry).
PROD	Defines the properties of a rod, which is referenced by the CROD entry.		Exported in large field format by optistructlf template.
PSHEAR	Defines the properties of a shear panel.
PSHELL	Defines the membrane, bending, transverse shear, and membrane-bending coupling of shell elements.	MID2_opts MID3_opts CONT PSHELLX	Exported in large field format by optistructlf template.
PSOLID	Defines the properties of solid elements. Referenced by CHEXA, CPENTA, CPYRA and CTETRA entries.	CORDM options (Blank, -1, User) PSOLIDX
PTUBE	Defines the properties of a thin-walled cylindrical tube element. Referenced by the CTUBE entry.
PVISC	Defines properties of a one-dimensional viscous damping element (CVISC entry).
PWELD	Defines properties of connector (CWELD) elements.

Note:

•	Only one property definition is allowed on each property collector. For definitions like PMASS, which allow more than one definition on the same card, this is separated on import into four different cards.

•	1D elements can be organized into components with 2D and 3D elements, and these component groupings are maintained on export and import. However, this usage is not recommended.

•	To assign 1D elements to property collectors, select the property collector from the property = field in the appropriate 1D element panel.

The following Abaqus keywords are supported as properties:

Supported Card	Solver Description	Supported Parameters	Notes
*ADAPTIVE CONTROLS	Controls various aspects of the adaptive meshing and advection algorithms applied to an adaptive mesh domain.	GeometricEnhancement InitialFeatureAngle MeshingPredictor Reset TransitionFeatureAngle Weight_Config_Projection Weight_Volumetric_Smooth If you are using Abaqus/Explicit the following parameters are also supported: Advection CurvatureRefinement MeshConstraintAdvection SmoothingObjective Volumetric_Smoothing Laplacian_Smoothing Equipotential_Smoothing
*BEAM ADDED INERTIA	Define additional beam inertia.	ALPHA, COMPOSITE, Mass, CM_x1, CM_x2, Angle, l11, l22, l12
*BEAM GENERAL SECTION	Specify a beam section when numerical integration over the section is not required.	ELSET, SECTION No_auto_prefix_for_names, Use_long_names, Use_quotes, Density, Dependency, Poisson, Zero, RotaryIntertia, SectionType, Section_Axis, BMG_Mat, Centroid, ShearCenter, SectionPoints, Beam_Added_Inertia, Ignore_HyperBeam_Section_Type TransverseShearStiffness	Only one BEAM GENERAL SECTION card is output per component. Therefore, the beam elements in each component must have the same cross-sectional properties. Sub-options AXIAL, BEAM ADDED INERTIA, CENTROID, SHEAR CENTER, THERMAL EXPANSION and *TRANSVERSE SHEAR STIFFNESS are supported.
*BEAM SECTION	Specify a beam section when numerical integration over the section is required.	ELSET, MATERIAL, SECTION a, b, t1-t4 No_auto_prefix_for_names, Use_long_names, Use_quotes, Temperature, Poisson, RotaryInertia, SectionType, Section_Axis, Integration_Points, Beam_Added_Inertia, Ignore_HyperBeam_Section_Type, TransverseShearStiffness	Only one BEAM SECTION card is output per component. Therefore, the beam elements in each component must have the same cross-sectional properties. Sub-options BEAM ADDED INERTIA and *TRANSVERSE SHEAR STIFFNESS are supported.
*COHESIVE SECTION	Specify element properties for cohesive elements.	ELSET MATERIAL CONTROLS ORIENTATION RESPONSE= {TRACTION SEPARATION, CONTINUUM, GASKET} STACK DIRECTION = {1,2,3, ORIENTATION} THICKNESS= {GEOMETRY, SPECIFIED}	Sub-option *TRANSVERSE SHEAR STIFFNESS is supported.
*CONNECTOR SECTION	Specify connector attributes for connector elements.	ELSET BEHAVIOR ELIMINATION	The following types are supported: Standard template: ACCELEROMETER, ALIGN, AXIAL, BEAM, BUSHING, CARDAN, CARTESIAN, CONSTANT VELOCITY, CVJOINT, CYLINDRICAL, EULER, FLEXION-TORSION, FLOW-CONVERTER, HINGE, JOIN, LINK, PLANAR, PROJECTION CARTESIAN, PROJECTION FLEXION-TORSION, RADIAL-THRUST, RETRACTOR, REVOLUTE, ROTATION, SLIDE-PLANE, SLIPRING, SLOT, TRANSLATOR, UJOINT, UNIVERSAL, WELD, Explicit template: All listed above, as well as ROTATION-ACCELEROMETER
*CONTACT DAMPING	Define viscous damping between contacting surfaces.	DEFINITION=DAMPING COEFFICIENT	This card is a sub-option in the *SURFACE INTERACTION card image.
*DASHPOT	Define dashpot behavior.	ELSET NONLINEAR ORIENTATION DEPENDENCIES	Only one DASHPOT card is output per component. Therefore, the spring elements in each component must have the same properties. When the DASHPOT card is written for DASHPOT1 elements, both dof1 and dof2 are written, but Abaqus only reads dof1. For DASHPOTA elements, choose the DASHPOTA option in the *DASHPOT card image.
*ELEMENT PROPERTIES		OFFSET ORIENTATION THICKNESS
*EULERIAN SECTION	Define properties of Eulerian continuum elements, including the list of materials that may occupy the elements.	ELSET
*FASTENER (SPOT WELD) PROPERTY	Prescribe mesh-independent fastener properties.	NAME MASS
*FLUID BULK MODULUS	Define compressibility for a hydraulic fluid.	Bulk_Mod Temp Dependency	This option is used to define compressibility for the hydraulic fluid model. It can be used only in conjunction with the FLUID BEHAVIOR option or the FLUID PROPERTY option.
*FLUID DENSITY	Specify hydrostatic fluid density.	Pressure Temperature	This option is used to define the reference fluid density for fluid cavities. It is applicable only for hydraulic and pneumatic fluids and should not be used for user-defined fluids. The FLUID DENSITY option can be used only in conjunction with the FLUID BEHAVIOR option or the *FLUID PROPERTY option.
*FLUID EXPANSION	Specify the thermal expansion coefficient for a hydraulic fluid.	Mean Temp Zero Dependency	This option is used to define thermal expansion coefficients for the hydraulic fluid model. It can be used only in conjunction with the FLUID BEHAVIOR option or the FLUID PROPERTY option.
*FLUID PROPERTY	Define properties for hydrostatic fluid elements.	ELSET REF NODE TYPE AMBIENT NAME	Sub-options FLUID DENSITY, FLUID EXPANSION, and *FLUID BULK MODULUS are supported.
*FRICTION	Specify a friction model.	ANISOTROPIC DEPENDENCIES DEPVAR ELASTIC SLIP EXPONENTIAL DECAY LAGRANGE PROPERTIES SLIP TOLERANCE ROUGH TAUMAX USER	This card is a sub-option in the SURFACE INTERACTION card image. It is also supported as a separate card image to allow for it to be used as a sub-option of the CONNECTOR FRICTION card (in *CONNECTOR BEHAVIOR).
*GAP	Specify clearance and local geometry for GAP-type elements.	ELSET	Only one *GAP card is output per component. Therefore, the gap elements in each component must have the same properties. Not in Explicit template.
*GASKET SECTION	Specify element properties for gasket elements.	ELSET MATERIAL BEHAVIOR ORIENTATION STABILIZATION STIFFNESS	Only in Standard templates.
*JOINT	Define properties for JOINTC elements.	ELSET ORIENTATION	Only one JOINT card is output per component. Therefore, the spring elements in each component must have the same properties. The SPRING and DASHPOT cards in the JOINT property behave the same way as the individual cards mentioned above. See the How do I section below for more information. Not in Explicit template.
*MASS	Specify a point mass.	ELSET COMPOSITE ALPHA	Only one *MASS card is output per component. Therefore, the mass elements in each component must have the same properties.
*MEMBRANE SECTION	Specify section properties for membrane elements.	ELSET MATERIAL ORIENTATION NODAL THICKNESS POISSON CONTROLS	Sub-option *HOURGLASS STIFFNESS is supported.
*NONSTRUCTURAL MASS	Specify mass contribution to the model from nonstructural features.	ELSET UNITS = {TOTAL MASS, MASS PER VOLUME, MASS PER AREA, MASS PER LENGTH} DISTRIBUTION = {MASS PROPORTIONAL, VOLUME PROPORTIONAL}	For Abaqus Explicit template only
*PHYSICAL CONSTANTS	Specify physical constants.	ABSOLUTE ZERO SPL REFERENCE PRESSURE STEFAN BOLTZMANN UNIVERSAL GAS CONSTANT
*REBAR LAYER	Reinforcement definition	ORIENTATION, GEOMETRY=(CONSTANT, ANGULAR, LIFT EQUATION)	The keyword is available in the card image of these sections: SHELL SECTION (homogeneous and composite), MEMBRANE SECTION, SURFACE SECTION
*RIGID BODY	Define a set of elements as a rigid body and define rigid element properties.	ELSET REFNODE ANALYTICAL SURFACE ISOTHERMAL PIN NSET TIE NSET POSITION DENSITY NODAL THICKNESS OFFSET	For Analytical Rigid Surfaces, the ANALYTICAL SURFACE parameter should point to the corresponding ANALYTICAL_RIGID_SURFACE group from the card image of the *RIGID BODY card.
*ROTARY INERTIA (no longer listed on panel)	Define rigid body rotary inertia.	ELSET ALPHA COMPOSITE ORIENTATION	Only one *ROTARY INERTIA card is output per component. Therefore, the ROTARY1 elements in each component must have the same properties.
*SECTION CONTROLS	Specify section controls.	NAME WEIGHT FACTOR SECOND ORDER ACCURACY DISTORTION CONTROL LENGTH RATIO HOURGLASS = {VISCOUS, COMBINED, ENHANCED, RELAXED STIFFNESS, STIFFNESS} KINEMATIC SPLIT = {CENTROID, AVERAGE STRAIN, ORTHOGONAL} ELEMENT DELETION INITIAL GAP OPENING MAX DEGRADATION VISCOSITY
*SHELL GENERAL SECTION	Define a general, arbitrary, elastic shell section.	COMPOSITE: COMPOSITE, ELSET, DENSITY, CONTROLS, LAYUP, OFFSET, ORIENTATION, POISSON, SMEAR ALL LAYERS, STACK DIRECTION, SYMMETRIC, THICKNESS MODULUS, NODAL THICKNESS HOMOGENOUS: MATERIAL, ELSET, DENSITY, BENDING ONLY, CONTROLS, MEMBRANE ONLY, OFFSET, ORIENTATION, POISSON, STACK DIRECTION, THICKNESS MODULUS, NODAL THICKNESS USER: USER, ELSET, DENSITY, CONTROLS, OFFSET, ORIENTATION, POISSON, STACK DIRECTION, THICKNESS MODULUS, NODAL THICKNESS, I PROPERTIES, PROPERTIES, UNSYMM, VARIABLES DIRECT: ELSET, DENSITY, BENDING ONLY, CONTROLS, MEMBRANE ONLY, OFFSET, ORIENTATION, POISSON, STACK DIRECTION, THICKNESS MODULUS, ZERO, DEPENDENCIES	Sub-options HOURGLASS STIFFNESS and TRANSVERSE SHEAR STIFFNESS are supported.for Composite and Homogenous
*SHELL SECTION	Specify a shell cross-section.	COMPOSITE: COMPOSITE, CONTROLS, ELSET, DENSITY, LAYUP, NODAL THICKNESS, OFFSET, ORIENTATION, POISSON, SECTION INTEGRATION, STACK DIRECTION, SYMMETRIC, TEMPERATURE, THICKNESS MODULUS HOMOGENOUS: MATERIAL, CONTROLS, ELSET, DENSITY, NODAL THICKNESS, OFFSET, ORIENTATION, POISSON, SECTION INTEGRATION, STACK DIRECTION, TEMPERATURE, THICKNESS MODULUS	Sub-options HOURGLASS STIFFNESS and TRANSVERSE SHEAR STIFFNESS are supported.
*SOLID SECTION	Specify element properties for solid, infinite, acoustic, and truss elements.	COMPOSITE: COMPOSITE, CONTROLS, ELSET, LAYUP, ORIENTATION, STACK DIRECTION, SYMMETRIC HOMOGENOUS: CONTROLS, ELSET, MATERIAL, ORIENTATION, REF NODE	Sub-option *HOURGLASS STIFFNESS is supported. REF NODE - generalized plane strain and acoustic infinite elements
*SPRING	Define spring behavior.	ELSET NONLINEAR ORIENTATION DEPENDENCIES	Only one SPRING card is output per component. Therefore, the spring elements in each component must have the same properties. When the SPRING card is written for SPRING1 elements, both dof1 and dof2 are written, but Abaqus only reads dof1. For SPRINGA elements, choose the SPRINGA option in the *SPRING card image.
*SURFACE BEHAVIOR	Define alternative pressure-overclosure relationships for contact.	NO SEPARATION PRESSURE-OVERCLOSURE= HARD, EXPONENTIAL, LINEAR, TABULAR, AugmeNted Lagrange, PENALTY	This card is a sub-option in the *SURFACE INTERACTION card image.
*SURFACE INTERACTION	Define surface interaction properties.	NAME	For Abaqus Explicit template, this card is defined as a group from the Interface panel.
SURFACE PROPERTY / EMISSIVITY	Define surface properties for cavity radiation analysis. It must immediately precede the *EMISSIVITY option.	Emissivity Temperature Dependency
*SURFACE SECTION	Specify section properties for surface elements.	ELSET DENSITY
*SURFACE SMOOTHING	Create a surface smoothing definition for contact interactions. It must be used in conjunction with the *CONTACT PAIR option.	NAME
*TRANSVERSE SHEAR STIFFNESS	Define transverse shear stiffness for beams and shells.	K23, K13, SCF	This option must be used in conjunction with the BEAM GENERAL SECTION option, the BEAM SECTION option, the COHESIVE SECTION option, the SHELL GENERAL SECTION option, or the *SHELL SECTION option. The transverse shear stiffness defined with this option affects only the transverse shear flexible elements whose section properties are defined by the immediately preceding section option.

Supported Card	Solver Description	Supported Parameters	Notes
*CONSTRAINED_JOINT_ STIFFNESS_FLEXION- TORSION	Define optional rotational and translational joint stiffness for joints.	PIDA, PIDB, CIDA, CIDB, JID, LCIDPH, LCIDT, LCIDPS, DLCIDPH, DLCIDDT, DLCIDPS, ESPH, FMPH, EST, FMT, ESPS, FMPS, NSAPH, PSAPH, NSAT, PSAT, NSAPS, PSAPS Title
*CONSTRAINED_JOINT_ STIFFNESS_ GENERALIZED	Define optional rotational and translational joint stiffness for joints.	PIDA, PIDB, CIDA, CIDB, JID, LCIDPH, LCIDT, LCIDPS, DLCIDPH, DLCIDDT, DLCIDPS, ESPH, FMPH, EST, FMT, ESPS, FMPS, NSAPH, PSAPH, NSAT, PSAT, NSAPS, PSAPS
*CONSTRAINED_JOINT_ STIFFNESS_ TRANSLATIONAL	Define optional rotational and translational joint stiffness for joints.	PIDA, PIDB, CIDA, CIDB, JID, LCIDX, LCIDY, LCIDZ, DLCIDX, DLCIDY, DLCIDZ, ESX, FFX, ESY, FFY, ESZ, FFZ, NSDX, PSDX, NSDY, PSDY, NSDZ, PSDZ
*DAMPING_PART_MASS	Define mass weighted damping by part ID	LCID, SF, FLAG Options (None, Inertia, Reposition, Interia_Contact, Reposition_Contact, Contact)
*DAMPING_PART_MASS_ SET
*DAMPING_PART_ STIFFNESS	Assign Rayleigh stiffness damping coefficient by part ID	BETA Options (None, Inertia, Reposition, Interia_Contact, Reposition_Contact, Contact)
*DAMPING_PART_ STIFFNESS_SET
*DAMPING_RELATIVE	Apply damping relative to the motion of a rigid body.	CDAMP, FREQ, PIDRB, PSID
*DEFINE_CONNECTION_ PROPERTIES	Define failure related parameters for solid element spot weld failure by *MAT_SPOTWELD_DAIMLERCHRYSLER.	PROPRUL, AREAEQ, DG_TYP, D_SIGY, D_ETAN, D_DG_PR, D_RANK, D_SN, D_SB, D_SS, D_EXSN, D_EXSB, D_EXSS, D_LCSN, D_LCSB, D_LCSS, MID, SGIY, ETAN, DG_PR, RANK, SN, SB, SS, EXSN, EXSB, EXSS, LCSN, LCSB, LCSS Number_of_Materials
*EOS_GRUNEISEN (EOS 4)	Equation of state Form 4.	C, S1, S2, S3, GAMA0, A, E0, V0 Title
*EOS_IDEAL_GAS (EOS 12)	Equation of state for 12 for modeling ideal gas.	CV0, CP0, CL, CQ, T0, V0 Title
*EOS_IGNITION_AND_ GROWTH_OF_REACTION_ IN_HE (EOS 7)	Equation of state Form 7.	A, B, XP1, XP2, FRER, G, R1 - R6, FMXIG, FREQ, GROW1, EM, AR1, ES1, CVP, CVR, EETAL, CCRIT, ENQ, TMP0, GROW2, AR2, ES2, EN, FMXGR, FMNGR Title
*EOS_JWL (EOS 2)	Equation of state Form 2.	A, B, R1, R2, Omeg, E0, V0 Title
*EOS_LINEAR_ POLYNOMIAL (EOS 1)	Equation of state Form 1. Define coefficients for linear polynomial EOS and initialize the initial thermodynamic state of the material.	c0 - c6, E0, V0 Title
*EOS_LINEAR_ POLYNOMIAL_WITH_ ENERGY_LEAK (EOS 6)	Equation of state Form 6.	C0 - C6, E0, V0, LCID Title
*EOS_PROPELLANT_ DEFLAGRATION (EOS 10)	Equation of state Form 10. Added to model airbag propellants.	A, B, XP1, XP2, FRER, G, R1, R2, R3, R5, R6, FMXIG, FREQ, GROW1, EM, AR1, ES1, CVP, CVR, CCRIT, ENQ, TMP0, GROW2, AR2, ES2, EN, FMXGR, FMNGR Title
*EOS_RATIO_OF_ POLYNOMIALS (EOS 5)	Equation of state Form 5.	A10 - A13, A20 - A23, A30 - A33, A40 - A43, A50 - A53, A60 - A63, A70 - A73, A14, A24, ALPH, BETA, E0, V0 Title
*EOS_SACK_TUESDAY (EOS 3)	Equation of state Form 3.	A1, A2, A3, B1, B2, E0, V0 Title
*EOS_TABULATED (EOS 9)	Equation of state Form 9.	GAMA, E0, V0, EV1- EV10, C1 - C10, T1 - T10 Title
*EOS_TABULATED_ COMPACTION (EOS 8)	Equation of state Form 8.	E0, V0, EV1 - EV10, C1 - C10, T1 - T10, K1 - K10 Title
*EOS_TENSOR_PORE_ COLLAPSE (EOS 11)	Equation of state Form 11.	NLD, NCR, MU1, MU2, IE0, EC0 Title
*HOURGLASS	Define hourglass and bulk viscosity properties which are referenced via HGID in the *PART command.	IHQ, QM, IBQ, Q1, Q2, QB, QW Title
*INTEGRATION_BEAM	Define user defined through the thickness integration rules for the beam element.	LSD_NIP, RA, ISCT, K Title
*INTEGRATION_SHELL	Define user defined through the thickness integration rules for the shell element.	LSID_NIP, ESOP, FAILOPT Title
*MAT_ADD_EROSION	Many of the consitutive models in LS-DYNA do not allow failure and erosion. This option provides a way of including failure in these models although the option can also be applied to constitutive models of other failure/erosion criterion.	ID, EXCL, MXPRES, MNEPS, MNPRES, SIGP1, SIGVM, MEXPS, EPSSH, SIGTH, IMPULSE, FAILTM Title
*SECTION_BEAM(TITLE)	Define cross sectional properties for beam, truss, discrete beam and cable elements.	ELFORM, SHRF, QR, CST, SCOOR, NSM, Area, ISS, ITT, IRR, SA, Title, Int_Rule_ID Options (Generic, Standard)
*SECTION_BEAM_AISC	Defines cross-sectional properties for beams and trusses.	ELFORM, SHRF, NSM, LFAC, NSLOC, NTLOC, K Title
*SECTION_DISCRETE (TITLE)	Define spring and damper elements for translation and rotation.	DRO, KD, V0, CL, FD, CDL, TDL Title
*SECTION_POINT_ SOURCE(TITLE)	Provides the inlet boundary condition for single gas flow (inflation potential) via a set of point source(s).	LCIDT, LCIDVOLR, LCIDVEL, NIDLC001, NIDLC002, NICDL003, IDIR, NumPtSrc, NODEID, VECID, ORIFAREA MIXTURE, Title
*SECTION_POINT_ SOURCE_MIXTURE(TITLE)	Provides: (a) an element formulation for a solid ALE part of the type similar to ELFORM=11 of *SECTION_SOLID and (b) the inlet gas injection boundary condition for multiple-gas mixture in-flow via a set of point sources.	LCIDT, LCIDVEL, NIDL001, NIDLC002, NIDLC003, IDIR, LCMDOT1 - LCMDOT8, NumPtSrc, NODEID, VECID, ORIFAREA Title
*SECTION_SEATBELT (TITLE)	Define section properties for the seat belt elements.	Title
*SECTION_SHELL(TITLE)	Define section properties for shell elements.	ELFORM, SHRF, NIP, PROPT, QR, ICOMP, SETYP, T1, NLOC, MAREA, EDGSET Options (NONE, ALE, EFG) Title, Int_Rule_ID, NonUniform Thickness
*SECTION_SHELL_ALE (TITLE)	Define section properties for shell elements.	ELFORM, SHRF, NIP, PROPT, QR, ICOMP, SETYP, T1, NLOC, MAREA, EDGSET, AFAC, BFAC, CFAC, DFAC, EFAC, START, END, AAFAC Title, Int_Rule_ID, NonUniform Thickness
*SECTION_SHELL_EFG (TITLE)	Define section properties for shell elements.	ELFORM, SHRF, NIP, PROPT, QR, ICOMP, SETYP, T1, NLOC, MAREA, EDGSET, DX, DY Title, Int_Rule_ID, NonUniform Thickness
*SECTION_SOLID(TITLE)	Define section properties for solid continuum and fluid elements.	ELFORM, AET Options (NONE, ALE, EFG) Title
*SECTION_SOLID_ALE (TITLE)	Define section properties for solid continuum and fluid elements.	ELFORM, AET, AFAC, BFAC, CFAC, DFAC, START, END, AAFAC Title
*SECTION_SOLID_EFG (TITLE)	Define section properties for solid continuum and fluid elements.	ELFORM, AET, DX, DY, DZ, ISPLINE, IDILA, IEBT, IDIM, TOLDEF, IPS, STIME, IKEN, SF, CMID, IBR, DS, ECUT Title
*SECTION_SPH	Define section properties for SPH particles.	CSLH, HMIN, HMAX, SPHNI, DEATH, START Title
*SECTION_SPH_TENSOR		CSLH, HMIN, HMAX, SPHINI, DEATH, START, HXCSLH, HYCSLH, HZCSLH, HXINI, HYINI, HZINI Title
*SECTION_SPH_USER		CSLH, HMIN, HMAX, SPHINI, DEATH, START Title
*SECTION_TSHELL(TITLE)	Define section properties for SPH particles.	ELFORM, SHRF, NIP, PROPT, QR, ICOMP Title

Only one card image can be loaded into each property collector.

1D elements can be grouped into components with 2D and 3D elements for display purposes. The component groupings are maintained on export and import.

To assign 1D elements to property collectors, select the property collector from property = in the appropriate 1D element panel.

Properties for PBAR and PBEAM cards can be manually input in the card image or automatically created using the HyperBeam module. See the HyperBeam online help for more information.

The HM_ELAS card defines properties for an HM_Spring element.

Note:

Nastran users should consider using the PBUSH property card instead of HM_ELAS.

The spring entity is a single DOF and single spring constant finite-length element. HM_ELAS property cards can be used to convert single spring elements into a group of zero-length springs and rigids. Six DOFs are defined in a single property card, and the springs in this group are created as zero-length to avoid some of the common modeling errors caused by finite-length springs. The following diagram illustrates how a single HM_ELAS spring element converts to a Nastran bulk data file:

hm_elas

As shown above, the single spring element writes a group of rigids and springs. On export, the following occurs:

1.	A new node is created (Node 3) which is coincident with Node 2. The new node references the same local coordinate system as Node 2.

2.	An RBE2 element is created, with 6 DOFS fixed, between Node 1 and Node 3.

3.	Up to six zero-length elements are created, between Node 2 and Node 3, based on the following settings in the HM_ELAS property card:

− If the DOF is a value you set, a CELAS2 element is created for that DOF, with the K field equal to the supplied value

− If the DOF is set to RIGID, an RBE2 element is created, with that DOF fixed

− If the DOF is set to FREE, no elements are created for that DOF

Comment cards are written at the beginning and end of each HM_SPRING (HMSPRING) element so that the element can be imported correctly in the session. These comment cards suppress the reading of the individual CELAS2 and RBE2 elements and the third "artificial" nodes so that you are left with the two original nodes and a single spring element once the bulk data file is loaded back into Engineering Solutions.

Note:

Removing these comment cards allows you to load the elements back into Engineering Solutions the way Nastran sees them. If this is done, make sure that any equivalencing operations performed using these elements are done properly.

Supported Card	Solver Description	Supported Parameters	Notes
BCBDPRP	Defines contact body parameters.	BNC, BNCE, BNL, BNLE, CFILM, CMB, CMS, COPTB, EMISS, FRIC, HBL, HCT, HCV, HNC, HNCE, HNL, HNLE, IDSPL, ISTYP, ITYPE, MIDNOD, SANGLE, TBODY, TSINK
BCONPRG	Defines geometric contact parameters of touching bodies.	AUGDIST, BIAS, CINTERF, COPTM, COPTS, ERROR, HARDS, ICOORD, IGLUE, ISEARCH, JGLUE, PENALT, SLIDE, STKSLP, TPENALT
BCONPRP	Defines physical contact parameters of touching bodies.	BGM, BGN, BGSN, BGST, BNC, BNL, DQNEAR, EMISS, FNTOL, FRIC, FRLIM, HBL, HCT, HCV, HGLUE, HNC, HNL
PAABSF	Defines the properties of a frequency-dependent acoustic absorber element.	TZREID, TZIMID, S, A, B, K, RHOC
PACABS	Defines the properties of the acoustic absorber element.	SYNTH, TID1-TID3, TESTAR, CUTFR, B, K, M
PACBAR	Defines the properties of the acoustic barrier element.	MBACK, MSEPTM, FRESON, KRESON	PACBAR is referenced by a CHACBR entry only. Either FRESON or KRESON must be specified, but not both.
PACINF	Defines the properties of acoustic conjugate infinite elements.	RIO, XP, YP, ZP
PAERO1	Defines associated bodies for the panels in the Doublet-Lattice method.	PID, B NUM_B
PAERO2	Defines the cross-sectional properties of aerodynamic bodies.	PID, ORIENT, WIDTH, AR, LRSB, LRIB, LTH1, LTH2, THI, THN
PAXSYMH	Defines the properties of a linear axisymmetric harmonic element.
PBAR	Defines the properties of a simple beam element (CBAR entry).	beamsec A, I1, I2, J, NSM CONT1
PBARL	Defines the properties of a simple beam element (CBAR entry) by cross-sectional dimensions.	beamsec GROUP CStype (ROD, TUBE, I, CHAN, T, BOX, BAR, CROSS, H, T1, I1, CHAN1, Z, CHAN2, T2, BOX1, HEXA, HAT, HAT1, DBOX) DIMs NSM
PBEAM	Defines the properties of a beam element (CBEAM entry). This element may be used to model tapered beams.	beamsec Aa, I1a, I2a, Ja, NSMa PBEAM_CARD3 CONTINUATION LINE2 CONTINUATION LINE5 CONTINUATION LINE6	Blank fields are not supported for intermediate stations. Appropriate default values are inserted during feinput.
PBEAML	Defines the properties of a beam element by cross-sectional dimensions.	beamsec GROUP TYPE (ROD, TUBE, L, I, CHAN, T, BOX, BAR, CROSS, H, T1, I1, CHAN1, Z, CHAN2, T2, BOX1, HEXA, HAT, HAT1, DBOX) DIM1A, NSM pbeamlintStationslen	Blank fields are not supported for intermediate stations. Appropriate default values are inserted during feinput.
PBEND	Defines the properties of a curved beam, curved pipe, or elbow element (CBEND entry).	A, I1, I2, J, RB, THETAB AltFormatOption (CONT1)
PBUSH	Defines the nominal property values for a generalized spring-and-damper structural element.	K_LINE, B_LINE, RCV_LINE, GE_LINE, PBUSHT
PBUSH1D	Defines linear and nonlinear properties of a one-dimensional spring and damper element (CBUSH1D entry).	K, C, M, SA, SE SHOCKA_LINE SPRING_LINE DAMPER_LINE GENER_LINE
PBUSHT	Defines the frequency dependent properties or the stress dependent properties for a generalized spring and damper structural element.
PCOMP	Defines the properties of an n-ply composite material laminate.	PID, Z0, NSM, SB, FT, TREF, GE, LAM, MID, T, THETA, SOUT NUMBER_of_Plies
PCOMPG	Defines global (external) ply IDs and properties for a composite material laminate.	PID, Z0, NSM, SB, FT, TREF, GE, LAM, GPLYID, MID, T, THETA, SOUT NUMBER_of_Plies
PCONVM	Specifies forced convection boundary condition properties for a boundary condition surface element.
PDAMP	Specifies the damping value of a scalar damper element using defined CDAMP1 or CDAMP3 entries.	B
PELAS	Specifies the stiffness, damping coefficient, and stress coefficient of a scalar elastic (spring) element (CELAS1 or CELAS3 entry).	K1, GE1, S1 PELAST
PELAST	Defines the frequency dependent properties for a PELAS Bulk Data entry.
PFAST	Defines the CFAST fastener property values.	D, MFLAG, KT1, KT2, KT3, KR1, KR2, KR3, MASS, GE MCID (-1, BLANK, MCID)
PGAP	Defines the properties of the gap element (CGAP entry).	U0, F0, KA, KB, KT, MU1, MU2, CONT
PHBDY	Property entry referenced by a CHBDYP element to give auxiliary geometric information for it.
PLPLANE	Defines the properties of a fully nonlinear (i.e., large strain and large rotation) hyperelastic plane strain or axisymmetric element.
PLSOLID	Defines a fully nonlinear (i.e., large strain and large rotation) hyperelastic solid element.	STR (GRID, GAUS)
PMASS	Specifies the mass value of a scalar mass element (CMASS1 or CMASS3 entries).	PID, M
PROD	Defines the properties of a rod element (CROD entry).	beamsec A, J, C, NSM
PSEAM	Defines the PSEAM property values.	TYPE, W, T
PSHEAR	Defines the properties of a shear panel (CSHEAR entry).	PID, MID, T, NSM, F1, F2
PSHELL	Defines the membrane, bending, transverse shear, and coupling properties of thin shell elements.	MID1_blank, MID2_opts, MID3_opts, CONT, PSHLN1
PSHELL1	Defines the properties of SOL 700 shell elements, which are more complicated than the shell elements defined using the PSHELL entry.	MID, FORM (HUGHES, BLT, KEYHOFF, C0-TRIA, MEMB), QUAD(GAUSS, LOBATTO), NUMB, SHFACT, T1 to T4
PSHLN1		C3, C4, C6, C8
PSOLID	Defines the properties of solid elements (CHEXA, CPENTA, and CTETRA entries).	CORDM options (BLANK, -1, USER) IN, STRESS, ISOP, FCTN, PSLDN1
PTUBE	Defines the properties of a thin-walled cylindrical tube element (CTUBE entry).	beamsec OD, T, NSM, OD2
PVISC	Defines properties of a one-dimensional viscous damping element (CVISC entry).	CE1, CR1
PWELD	Defines the properties of connector (CWELD) elements.	beamsec D, MSET, TYPE LDMIN, LDMAX

The Nastran and OptiStruct interfaces allow the property between groups to have the same ID. For example, PBAR3, PSHELL 3, PSOLID 3, etc. Duplicate IDs within the same group is not allowed.

Nastran and OptiStruct properties are grouped as follows:

0D_Rigids	PMASS
1D	PBAR, PBARL, PBEAM, PBEAML, PBEAND, PROD, PTUBE, PWELD
SPRING_GAP	PBUSH, PBUSH1D, PDAMP, PELAS, PGAP, PVISC
2D	PSHELL, PSHEAR, PCOMP, PCOMG
3D	PSOLID

Supported Card	Solver Description	Supported Parameters	Notes
FRICT /	Friction modeling definition.	FRICT TITLE Friction model: 1: Standard Coulomb 2: Pressure dependent by curve 3: Velocity dependent by curve 4: Pressure and velocity dependent by curves 5: Pressure dependent by standard function 1 6: Pressure dependent by standard function 2 10. Orthotropic friction using element direction 11. Orthotropic friction using arbitrary direction
GASPEC /	Specification of air bag gas.	WSGAS, ASGAS, BSGAS, CSGAS, DSGAS
RUPMO /	Rupture model definition.	IRUPT, IFMON, TITLE, FAILT, FAILD, AFAILN, AFAILS, A1, A2, INTF, D1, D2

Properties

Properties

Properties

Solver Card Support for Properties

The property data cards for OptiStruct can be created by loading and editing card images into property collectors. Properties can be assigned to components or elements.

Supported Card

Solver Description

Supported Parameters

Notes

Supported Card

Solver Description

Supported Parameters

Notes

Supported Card

Solver Description

Supported Parameters

Notes

Supported Card

Solver Description

Supported Parameters

Notes

See Also: