MAT9

Bulk Data Entry

MAT9 – Material Property Definition, Form 9

Defines the material properties for linear, temperature-independent, and anisotropic materials for solid elements.

Format

Field	Contents
MID	Unique material identification number. No default (Integer > 0)
Gij	The material property matrix. No default (Real)
RHO	Mass density. Used to automatically compute mass for all structural elements. No default (Real)
Ai	Thermal expansion coefficient vector. No default (Real)
TREF	Reference temperature for the calculation of thermal loads. Default = blank (Real or blank)
GE	Structural element damping coefficient. See comment 7. No default (Real)

1.	The material identification number must be unique for all MAT1, MAT2, MAT8, MAT9ORT and MAT9 entries.

2.	The convention for the Gij in fields 3 through 8 are represented by the matrix relationship.

bigequ

The subscripts 1 to 6 refer to x, y, z, xy, yz, and zx of the material coordinate system defined by the CORDM field on the PSOLID entry.

3.	Unlike the MAT1 entry, data from the MAT9 entry is used directly, without adjustment of equivalent E, G, or NU values.

4.	If material data is to specified with the Engineering Constants E1, E2, E3, NU12, NU13, NU23, G12, G23, and G13, then use the MAT9ORT data.

5.	The last continuation is optional.

6.	Long field format can be used.

7.	To obtain the damping coefficient GE, multiply the critical damping ratio, C/C0, by 2.0.

8.	This card is represented as a material in HyperMesh.