MAT5

Bulk Data Entry Defines the thermal material properties for anisotropic materials.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
MAT5 MID KXX KXY KXZ KYY KYZ KZZ CP  
  RHO HGEN              

Example

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
MAT5 2 .300     100   200    
  2e5                

Definitions

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. 2

No default (Integer > 0 or <String>)

  
Kij Thermal conductivity.

Default = 0.0 (Real)

  
CP Heat capacity per unit mass (specific heat). 4

(Real > 0.0 or blank)

  
RHO Density. 4

Default = 1.0 (Real > 0.0)

  
HGEN Heat generation capability used with QVOL entries. HGEN is the scale factor used with QVOL.

HGEN is the scale factor and QVOL is the power generated per unit volume, Pin = volume * HGEN * QVOL

Default = 1.0 (Real ≥ 0.0)

  

Comments

  1. The material identification number/string may be the shared with structural material property definitions (MAT1, MAT2, MAT8, MAT9 or MGASK), but must be unique with respect to other thermal material property definitions (MAT4 or MAT5).
  2. 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.
  3. The thermal conductivity matrix has the following form:(1)
    K = [ KXX KXY KXZ KXY KYY KYZ KXZ KYZ KZZ ]
  4. Heat capacity (CP) is defined per unit mass. It is multiplied by density (RHO) to calculate heat capacity matrix in transient heat transfer analysis. If RHO is not defined on MAT5, then positive density from a structural material entry with matching MID is used. If MAT5 does not have a corresponding matching structural material, then the default value of 1.0 is used.
  5. This card is represented as a material in HyperMesh.