Export ANSYS File: Properties

Description

Straus7 exports element properties according to the element type, material, nonlinear table assignment, applied attributes and export selections. The ANSYS element type is defined using the ET command. The material reference number (MAT), real set (REAL), section ID (SECNUM) and element coordinate system (ESYS) are specified in accordance with the defined ANSYS element type as follows:

ANSYS Element Type	Property Specifiers
COMBIN14	TYPE, REAL.
PIPE18	MAT, TYPE, REAL.
MASS21	TYPE, REAL.
MATRIX27	TYPE, REAL.
SHELL28	MAT, TYPE.
COMBIN39	TYPE, REAL.
SHELL41	MAT, TYPE, REAL, ESYS.
PLANE42	MAT, TYPE, REAL.
SHELL43	MAT, TYPE, REAL, ESYS.
BEAM44	MAT, TYPE, REAL, SECNUM.
CONTAC52	MAT, TYPE, REAL.
PLANE55	MAT, TYPE.
SOLID62	MAT, TYPE.
SOLID70	MAT, TYPE.
PLANE77	MAT, TYPE.
FLUID79	MAT, TYPE.
FLUID80	MAT, TYPE.
PLANE82	MAT, TYPE, REAL.
SOLID90	MAT, TYPE.
SHELL91	MAT, TYPE, REAL, ESYS.
SOLID92	MAT, TYPE.
SHELL93	MAT, TYPE, REAL, ESYS.
SOLID95	MAT, TYPE.
SHELL131	MAT, TYPE, SECNUM, ESYS.
SHELL132	MAT, TYPE, SECNUM, ESYS.
LINK180	MAT, TYPE, REAL.
SHELL181	MAT, TYPE, SECNUM, ESYS.
SHELL281	MAT, TYPE, SECNUM, ESYS.
PLANE182	MAT, TYPE, REAL.
PLANE183	MAT, TYPE, REAL.
SOLID185	MAT, TYPE, ESYS.
SOLID186	MAT, TYPE, ESYS.
SOLID187	MAT, TYPE, ESYS.
BEAM188	MAT, TYPE, SECNUM.

Material Data

Linear material properties are exported using the MP command for the Batch formats, and MPTEMP and MPDATA commands for the Unblocked and Blocked CDB formats. Linear material properties assigned with Factor vs Temperature tables are exported using the MPTEMP and MPDATA commands. The following Straus7 linear material properties are exported using the MP, MPTEMP and MPDATA commands:

Straus7 Property	ANSYS Type
Modulus (E1, E2, E3)	EX, EY, EZ
Poisson's Ratio (n12, n23, n31)	PRXY, PRYZ, PRZX, NUXY, NUYZ, NUZX
Shear Modulus (G12, G23, G31)	GXY, GYZ, GZX
Thermal Expansion (a1, a2, a3)	ALPX, ALPY, ALPZ
Density	DENS
Viscous Damping	DAMP
Conductivity (K1, K2, K3)	KXX, KYY, KZZ
Specific Heat	C

Modulus vs Temperature, Thermal Expansion vs Temperature, Conductivity vs Temperature and Specific Heat vs Temperature tables are exported according to the specified ANSYS linear material types. ANSYS tables are obtained from the Factor vs Temperature tables by multiplying each non-zero material constant by the table values. Table names are modified in accordance with ANSYS table naming conventions. For Modulus vs Temperature tables, the constants include E1, E2, E3, G12, G23 and G31. For Thermal Expansion vs Temperature tables, the constants include a1, a2 and a3. For Conductivity vs Temperature tables, the constants include K1, K2 and K3. For Specific Heat vs Temperature tables, the Specific Heat constant is used.

Isotropic material Stress vs Strain tables or Drucker-Prager yield criteria, anisotropic material matrices, laminate material failure criteria, rubber material data and creep model data are exported using the TB, TBTEMP, TBDATA and TBPT commands. Table names are modified in accordance with ANSYS table naming conventions. The following Straus7 nonlinear material properties and data are exported for the specified element types using the TB, TBTEMP, TBDATA and TBPT commands:

ANSYS Type	Element Types	Straus7 Property Conversion
KINH	LINK180, BEAM188.	Axial Stress vs Strain tables for beam and truss elements with the Elastic Plastic nonlinear type and Kinematic Hardening rule are exported using the TB, TBTEMP and TBPT commands.
MISO	SOLID62, LINK180, SHELL181, SHELL281, PLANE182, PLANE183, SOLID185, SOLID186, SOLID187, BEAM188.	Axial Stress vs Strain tables for beam and truss elements with the Elastic Plastic nonlinear type and Isotropic Hardening rule, or Stress vs Strain tables for isotropic plate and brick elements with Elastic Plastic nonlinear type and von Mises or Tresca yield criteria, are exported using the TB, TBTEMP and TBPT commands.
MELAS	SOLID62, LINK180, SHELL181, SHELL281, PLANE182, PLANE183, SOLID185, SOLID186, SOLID187, BEAM188.	Axial Stress vs Strain tables for beam and truss elements with the Elastic nonlinear type, or Stress vs Strain tables for isotropic plate and brick elements with Elastic nonlinear type and von Mises, Tresca or Max Stress yield criteria, are exported using the TB, TBTEMP and TBPT commands.
DP	PLANE42, SHELL43, SOLID62, PLANE82, SHELL93, SOLID95.	The Drucker-Prager yield criterion for isotropic plate and brick elements is exported using the TB and TBDATA commands.
ANEL	SHELL181, SHELL281, PLANE182, PLANE183, SOLID185, SOLID186, SOLID187.	The matrices for anisotropic and user-defined plate and brick element are exported using the TB, TBTEMP and TBDATA commands.
FAIL	SHELL91.	The failure criteria for laminates are exported using the TB, TBTEMP and TBDATA commands.
HYPER	SHELL181, SHELL281, PLANE182, PLANE183, SOLID185, SOLID186, SOLID187.	The Neo-Hookean, Mooney-Rivlin and Ogden hyperelastic data for rubber materials are exported using the TB, TBTEMP and TBDATA commands.
CREEP	SHELL181, SHELL281, PLANE182, PLANE183, SOLID185, SOLID186, SOLID187.	The parameters for Primary Power Law, Secondary Power Law, Primary + Secondary Power Law, Secondary Hyperbolic, Secondary Exponential, Generalised Graham and Generalised Blackburn creep models are exported using the TB, TBTEMP and TBDATA commands.

ANSYS assumes a von Mises yield surface for elastic-plastic stress-strain curve data.

Property and Geometry Data

Real set data is exported using the R, RMORE and REAL commands for the Batch format, R command for the Unblocked CDB format and RLBLOCK command for the Blocked CDB format. Section ID data is exported using the SECTYPE, SECDATA, SECREAD and SECOFFSET commands for beam data, SECTYPE, SECDATA, SECOFFSET and SECCONTROLS commands for plate data using the Batch and Unblocked CDB formats, and SECTYPE, SECBLOCK, SECOFFSET and SECCONTROLS commands for plate data using the Blocked CDB format. Straus7 beam sections are exported as equivalent ANSYS section types:

Straus7 Beam Section Shape	ANSYS Section Type
Solid Circle	CSOLID
Hollow Circle	CTUBE
I Section	I
Solid Rectangle	RECT
Hollow Rectangle	HREC
T Section	MESH
Lipped C Section	MESH
Top Hat	MESH
Angle	L
Solid Trapezoid	QUAD
Hollow Trapezoid	MESH
Z Section	Z
Solid Triangle	MESH
Hollow Triangle	MESH
Cruciform	MESH
BXS	MESH
Null (section data only)	ASEC

Element Coordinate System Data

Element coordinate system data is exported using the ESYS command for the Batch (1 File) format only. For all other formats, element coordinate system data is exported using the EN, ERRANG, EREAD and EBLOCK commands.