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MAT4 |
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MAT4 |
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MAT4 – Material Property Definition, Form 4
Defines constant thermal material properties for conductivity, density, and heat generation.
(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
MAT4 |
MID |
K |
CP |
RHO |
H |
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HGEN |
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Field |
Contents |
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MID |
Material identification number. No default (Integer > 0) |
K |
Thermal conductivity. Default = 0.0 (Real > 0.0) |
CP |
Heat capacity per unit mass (specific heat). See comment 3. (Real > 0.0 or blank) |
RHO |
Density. See comment 3. Default = 1.0 (Real > 0.0) |
H |
Free convection heat transfer coefficient. Default = 0.0 (Real) |
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 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. | MAT4 may specify material properties for any conduction elements. MAT4 also provides the heat transfer coefficient for free convection (see CONV). |
| 3. | 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 MAT4, then positive density from a structural material entry with matching MID is used. If MAT4 does not have a corresponding matching structural material, then the default value of 1.0 is used. |
| 4. | This card is represented as a material in HyperMesh. |
See Also:
