/HEAT/MAT

Block Format Keyword

/HEAT/MAT - Thermal Parameters and Analysis

Description

Describes thermal parameters for thermal analysis.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
/HEAT/MAT/mat_ID
T0				AS		BS		Iform
T1		AL		BL

Field	Contents	SI Unit Example
mat_ID	Material identifier (Integer, maximum 10 digits)
T0	Initial temperature (1st part) Default = 300K (Real)
	Specific heat per unit volume (Real)
AS	Thermal conductivity coefficient A for solid phase (Real)
BS	Thermal conductivity coefficient B for solid phase (Real)
Iform	Heat transfer formulation flag (Integer) = 0: for ALE formulation or LAW18, based on finite volume method, is available for ALE solid element (default) = 1: for Lagrangian formulation, based on finite element method, is available for solid and shell elements.
T1	Temperature of melting point Default = 1030 (Real)
AL	Thermal conductivity coefficient A for liquid phase (Real)
BL	Thermal conductivity coefficient B for liquid phase (Real)

#RADIOSS STARTER

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#- 1. MATERIALS:

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/MAT/PLAS_JOHNS/1

Steel (unit: Mg_mm_s)

# RHO_I

7.8E-9

# E NU

210000 .3

# a b n EPS_p_max SIG_max0

270 450 .6 0 0

# c EPS_DOT_0 ICC Fsmooth F_cut Chard

0 0 0 0 0 0

# m T_melt rhoC_p T_r

0 0 0 0

/HEAT/MAT/1

# T0 RHO0_CP AS BS IFORM

273 3.588 1.9E-2 0 1

# Blank card

/THERM_STRESS/MAT/1

# fct_IDT Fscale_y

1003 0

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#- 2. FUNCTIONS:

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/FUNCT/1003

linear expansion coefficient function of temperature

# X Y

273 1.2E-5

800 1.2E-5

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#enddata

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1.	Format Line 2 is used as purely thermal material.

2.	Available for all shell elements formulations; except QBAT, DKT18 and T6.

3.	Available for all solid elements formulations; except PA6 and standard 8-node solid full integration (no hourglass, Isolid = 12).

4.	The k (thermal conductivity) is computed as:

k = AS + BS * T

Where, T is the current temperature in Kelvin.

5.	The (thermal diffusivity) is computed as:

Cp heat capacity at constant pressure.

6.	New k’ (thermal conductivity) is computed as:

k' = AL + BL * T

7.	T1, AL, and BL can be used only for solid elements when finite volume method is used (Iform = 0).

8.	There is no thermal coupling between an ALE thermal material and a Lagrangian thermal material.