Subsections

• Material Type MAT
• Material Type GENERAL

Internal Material Types

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.

Material Type MAT

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 MAT STEEL1 200e3 .3 7860e-9 .15e-4 293

Corresponding NASTRAN Input Deck:

$ STEEL1     MID       E       G      NU     RHO       A    TREF
MAT1           1 210000.             .29 .786E-5  .15E-4    293.

Material Type GENERAL

This material is used to transfer up to 21 real number material values to the NASTRAN input file with material type MATX. It is then up to the user to edit the file in order to change the material to a valid NASTRAN type.

Argument(s) Purpose

1-21 any material data

Example FEMGEN Command:

PROPERTY MATERIAL GENERAL STEEL2 1 - 21

Corresponding NASTRAN Input Deck:

$ STEEL2     MID       REALS ... 
MATX           1      1.      2.      3.      4.      5.      6.      7.+MAT1   
+MAT1         8.      9.     10.     11.     12.     13.     14.     15.+MAT2   
+MAT2        16.     17.     18.     19.     20.     21.