MAT10

Bulk Data Entry Defines material properties for fluid elements in coupled fluid-structural analysis.

Format


(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
MAT10	`MID`	`BULK`	`RHO`	`C`	`GE`	`ALPHA`


(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
MAT10	2	0.5	22.1


Field	Contents	SI Unit Example
`MID`	Unique material identification. Integer Specifies an identification number for this material. <String> Specifies a user-defined string label for this material entry. 3 No default (Integer > 0 or <String>)
`BULK`	Bulk modulus. No default (Real > 0.0)
`RHO`	Mass density. Automatically computes the mass. No default (Real > 0.0)
`C`	Speed of sound. No default (Real > 0.0)
`GE`	Fluid element damping coefficient. No default (Real)
`ALPHA`	Normalized porous material damping coefficient. Since the admittance is a function of frequency, the value of `ALPHA` should be chosen for the frequency range of interest for the analysis. No default (Real)

MAT10 may be referenced by PSOLID entries with FCTN=PFLUID.
The material identification number/string must be unique with respect to MAT1, MAT2, MAT3, MAT9, and MAT10 entries, but may be shared with MAT4, MAT5 or MATFAT.
String based labels allow for easier visual identification of materials, including when being referenced by other cards. (example, the MID field of properties). For more details, refer to String Label Based Input File in the Bulk Data Input File.
BULK, RHO, and C are related by $B U L K = C^{2} \cdot R H O$ $B U L K = C^{2} \cdot R H O$ .
If only two out of the three values are specified, then the other will be calculated according to the above equation. If all three values are specified, then they should be consistent with the above equation to a tolerance of 1.0E-3.
To obtain the damping coefficient e, multiply the critical damping ratio $C / C_{0}$ $C / C_{0}$ by 2.0.
This card is represented as a material in HyperMesh.