Next: External Material Files Up: Material Property Definitions Previous: Material Property Definitions
Next: External Material Files
Up: Material Property Definitions
Previous: Material Property Definitions
The following tables illustrate the material types provided by the interface program. All materials are defined using the command 'PROPERTY MATERIAL type' with a number of additional arguments in which the material data is defined. Some material types have a variable number of arguments. This variation is used to differentiate between isotropic and orthotropic properties for example.
This isotropic material is used for linear structural procedures. There are 5 arguments, all of which are used. This material duplicates the function of the ELASTIC type but is retained for reasons of upward compatibility with previous versions of the interface.
Argument(s) Meaning 1 Young's Modulus
2 Poisson's Ratio
3 Density
4 Thermal Expansion Coefficient
5 Reference Temperature
Example FEMGEN Command:
PROPERTY MATERIAL MAT MAT1 1 2 3 4 5
Corresponding ABAQUS Input Deck:
*MATERIAL, NAME=MAT1 *DENSITY 3.000000 , *ELASTIC, TYPE=ISO 1.00 , 2.00 , 5.00 *EXPANSION, ZERO= 5.000000 4.000000 , 5.000000
Where thermal analyses are being performed and no thermal material types are present, the first 3 arguments of the MAT material type are used to define thermal material properties (see material type THERMAL). This feature has been retained to maintain compatibility with previous versions of the interface.
If the density value entered is zero, no card '*DENSITY' is written to the ABAQUS input file in the case of an ABAQUS/Standard analysis. For an ABAQUS/Explicit analysis a zero density is written to the ABAQUS input file. In both cases a relevant warning message is issued.
This orthotropic material is used for linear structural procedures. There are 15 arguments, all of which are used.
Argument(s) Purpose 1-8 Elastic Stiffness matrix components
9 D2323
10 Temperature
11 Density
12 Thermal Expansion Coefficient (11)
13 Thermal Expansion Coefficient (22)
14 Thermal Expansion Coefficient (33)
15 Reference Temperature
Example FEMGEN Command:
PROPERTY MATERIAL GENERAL MAT1 1 - 15
Corresponding ABAQUS Input Deck:
*MATERIAL, NAME=MAT1 *ELASTIC, TYPE=ORTHO 1.00 , 2.00 , 3.00 , 4.00 , 5.00 , 6.00 , 7.00 , 8.00 9.00 , 10.0 *DENSITY 11.00000 , *EXPANSION, ZERO= 15.00000 12.00000 , 13.00000 , 14.00000 , 15.00000
If the density value entered is zero, no card '*DENSITY' is written to the ABAQUS input file in the case of an ABAQUS/Standard analysis. For an ABAQUS/Explicit analysis a zero density is written to the ABAQUS input file. In both cases a relevant warning message is issued.
This isotropic material is used for linear structural procedures. There are 5 arguments, all of which are used.
Argument(s) Meaning 1 Young's Modulus
2 Poisson's Ratio
3 Density
4 Thermal Expansion Coefficient
5 Reference Temperature
Example FEMGEN Command:
PROPERTY MATERIAL ELASTIC MAT1 1 2 3 4 5
Corresponding ABAQUS Input Deck:
*MATERIAL, NAME=MAT1 *DENSITY 3.000000 , *ELASTIC, TYPE=ISO 1.00 , 2.00 , 5.00 *EXPANSION, ZERO= 5.000000 4.000000 , 5.000000
If the density value entered is zero, no card '*DENSITY' is written to the ABAQUS input file in the case of an ABAQUS/Standard analysis. For an ABAQUS/Explicit analysis a zero density is written to the ABAQUS input file. In both cases a relevant warning message is issued.
This isotropic material is used for nonlinear structural procedures. There are 25 arguments, the first 5 being used to define the elastic behaviour and optionally up to 10 pairs of arguments which are used to define the plastic behaviour.
The interface will only output the number of non-zero pairs which are entered. Note that temperature dependent plastic properties are not supported.
Argument(s) Purpose 1 Young's Modulus
2 Poisson's Ratio
3 Density
4 Thermal Expansion Coefficient
5 Reference Temperature
6,7 Yield Stress, Plastic Strain
n,n+1 Yield Stress, Plastic Strain
24,25 Yield Stress, Plastic Strain
Example FEMGEN Command:
PROPERTY MATERIAL EL-PLAST MAT1 1 2 3 4 5 6 7 8 9 10 11 12 13
Corresponding ABAQUS Input Deck:
*MATERIAL, NAME=MAT1 *DENSITY 3.000000 , *ELASTIC, TYPE=ISO 1.00 , 2.00 , 5.00 *EXPANSION, ZERO= 5.000000 4.000000 , 5.000000 *PLASTIC 6.000000 , 7.000000 8.000000 , 9.000000 10.00000 , 11.00000 12.00000 , 13.00000
If the density value entered is zero, no card '*DENSITY' is written to the ABAQUS input file in the case of an ABAQUS/Standard analysis. For an ABAQUS/Explicit analysis a zero density is written to the ABAQUS input file. In both cases a relevant warning message is issued.
This isotropic material is used for heat transfer procedures. There are 3 arguments, all of which are used.
Argument(s) Purpose 1 Density
2 Conductivity
3 Specific Heat Capacity
Example FEMGEN Command:
PROPERTY MATERIAL THERMAL MAT1 1 2 3
Corresponding ABAQUS Input Deck:
*MATERIAL, NAME=MAT1 *DENSITY 1.000000 , *CONDUCTIVITY, TYPE=ISO 2.000000 , *SPECIFIC HEAT 3.000000 ,
If the density value entered is zero, a warning message is issued.
This material is used to define acoustic properties. There are 22 arguments, the first 2 being used to define the density and bulk modulus and optionally up to 10 pairs of arguments which are used to define the dynamic behaviour.
The interface will only output the number of non-zero pairs which are entered.
Argument(s) Purpose 1 Density
2 Bulk Modulus
3,4 Volumetric Drag Coefficient, Frequency
n,n+1 Volumetric Drag Coefficient, Frequency
21,22 Volumetric Drag Coefficient, Frequency
Example FEMGEN Command:
PROPERTY MATERIAL ACOUSTIC MAT1 1 2 3 4 5 6 7 8 9 10
Corresponding ABAQUS Input Deck:
*MATERIAL, NAME=MAT1 *DENSITY 1.000000 , *ACOUSTIC MEDIUM, BULK MODULUS= 2.000000 3.000000 , 4.000000 5.000000 , 6.000000 7.000000 , 8.000000 9.000000 , 10.00000
If the density value entered is zero, a warning message is issued.
This material is used to define orthotropic, stress-dependent piezoelectric and dielectric properties. There are 36 arguments, 12 of which are used to define the elastic behaviour, the next 18 to define piezoelectric behaviour and optionally 1, 3, or 6 to define isotropic, orthotropic or anisotropic dielectric behaviour respectively. The number of non-zero dielectric properties is used to control the dielectric property type. At least 1 dielectric property must be entered.
Argument(s) Purpose 1-9 Elastic Stiffness Matrix Coefficients (D1111-D2323)
10 Reference Temperature
11 Thermal Expansion Coefficient
12 Density
13-30 Stress-dependent Piezoelectric Constants (e111-e323)
31 Isotropic Dielectric Constant
31-33 Orthotropic Dielectric Constants
31-36 Anisotropic Dielectric Constants
Example FEMGEN Command:
PROPERTY MATERIAL PIEZO-S MAT1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
Corresponding ABAQUS Input Deck:
*MATERIAL, NAME=MAT1 *DENSITY 12.00000 , *ELASTIC, TYPE=ORTHO 1.000 2.000 3.000 4.000 5.000 6.000 7.000 8.000 9.000 10.00 *EXPANSION, ZERO= 10.00000 11.00000 , 10.00000 *PIEZOELECTRIC, TYPE=S 13.00 14.00 15.00 16.00 17.00 18.00 19.00 20.00 21.00 22.00 23.00 24.00 25.00 26.00 27.00 28.00 29.00 30.00 *DIELECTRIC, TYPE=ANISO 31.00 32.00 33.00 34.00 35.00 36.00
If the density value entered is zero, no card '*DENSITY' is written to the ABAQUS input file in the case of an ABAQUS/Standard analysis and a warning message is issued.
This material is used to define orthotropic, strain-dependent piezoelectric and dielectric properties. There are 36 arguments as per PIEZO-S.
Argument(s) Purpose 1-9 Elastic Stiffness Matrix Coefficients (D1111-D2323)
10 Reference Temperature
11 Thermal Expansion Coefficient
12 Density
13-30 Strain-dependent Piezoelectric Constants (e111-e323)
31 Isotropic Dielectric Constant
31-33 Orthotropic Dielectric Constants
31-36 Anisotropic Dielectric Constants
Example FEMGEN Command:
PROPERTY MATERIAL PIEZO-E MAT1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
Corresponding ABAQUS Input Deck:
*MATERIAL, NAME=MAT1 *DENSITY 12.00000 , *ELASTIC, TYPE=ORTHO 1.000 2.000 3.000 4.000 5.000 6.000 7.000 8.000 9.000 10.00 *EXPANSION, ZERO= 10.00000 11.00000 , 10.00000 *PIEZOELECTRIC, TYPE=E 13.00 14.00 15.00 16.00 17.00 18.00 19.00 20.00 21.00 22.00 23.00 24.00 25.00 26.00 27.00 28.00 29.00 30.00 *DIELECTRIC, TYPE=ANISO 31.00 32.00 33.00 34.00 35.00 36.00
If the density value entered is zero, no card '*DENSITY' is written to the ABAQUS input file in the case of an ABAQUS/Standard analysis and a warning message is issued.
This isotropic material is used for porous materials. There are 7 arguments, all of which are used.
Argument(s) Purpose 1 Logarithmic Bulk Modulus
2 Poisson's ratio
3 Elastic Tensile Limit
4 Bulk Modulus of Solid Grains
5 Bulk Modulus of Permeating Fluid
6 Temperature
7 Density
Example FEMGEN Command:
PROPERTY MATERIAL POROUS MAT1 1 2 3 4 5 6 7
Corresponding ABAQUS Input Deck:
*MATERIAL, NAME=MAT1 *DENSITY 7.000000 , *POROUS ELASTIC 1.000000 , 2.000000 , 3.000000 , 6.000000 *POROUS BULK MODULI 4.000000 , 5.000000 , 6.000000
If the density value entered is zero, no card '*DENSITY' is written to the ABAQUS input file in the case of an ABAQUS/Standard analysis and a warning message is issued.
This material is used for fluid elements. The material should be attached to the relevant FLUID set (see section 2.10 ).There are 2 arguments, both of which are used.
Argument(s) Purpose 1 Fluid Density
2 Ambient Pressure
Example FEMGEN Command:
PROPERTY MATERIAL FLUID MAT1 800 101350.0 PROPERTY ATTACH FLUID2 MAT1
Corresponding ABAQUS Input Deck:
*FLUID PROPERTY,ELSET=FLUID2,AMB=101350.0,REF NODE=1,ABS=-273.16 *FLUID DENSITY 800.0000 ,
Femsys Limited