/HEAT/MAT

Block Format Keyword Describes thermal parameters for a given material in order to compute temperature evaluation.

Thermal conductivity is defined from k = A + B . T MathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4Aaiabg2 da9iaadgeacqGHRaWkcaWGcbGaaiOlaiaadsfaaaa@3BE4@ .

Thermal diffusivity is α = k / ρ 0 C p MathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaeqySdeMaey ypa0Jaam4Aaiaac+cacqaHbpGCdaWgaaWcbaGaaGimaaqabaGccaWG dbWaaSbaaSqaaiaadchaaeqaaaaa@3ED5@ .

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/HEAT/MAT/mat_ID/unit_ID
T0 ρ   0 C p AS BS    
Tmelt AL BL EFRAC    

Definition

Field Contents SI Unit Example
mat_ID Material identifier.

(Integer, maximum 10 digits)

  
unit_ID Unit Identifier.

(Integer, maximum 10 digits)

  
T0 Initial temperature (1st part).

Default = 300K (Real)

 [ K ]
ρ   0 C p (Mandatory) Specific heat per unit volume at constant pressure.

(Real)

 [ J m 3 ⋅ K ]
AS Thermal conductivity coefficient A for solid phase.

(Real)

 [ W m ⋅ K ]
BS Thermal conductivity coefficient B for solid phase.

(Real)

 [ W m ⋅ K 2 ]
Tmelt Temperature of melting point.

Default = 1020 (Real)

 [ K ]
AL Thermal conductivity coefficient A for liquid phase.

(Real)

 [ W m ⋅ K ]
BL Thermal conductivity coefficient B for liquid phase.

(Real)

 [ W m ⋅ K 2 ]
EFRAC Fraction of strain energy converted into heat.

Default = 1. (Real)

  

Example (Thermal)

#RADIOSS STARTER
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#-  1. MATERIALS:
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/UNIT/1
unit for mat
                  Mg                  mm                   s
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/MAT/PLAS_JOHNS/1/1
Steel 
#              RHO_I
              7.8E-9                   0
#                  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/1/1
#                 T0             RHO0_CP                  AS                  BS     
                 273               3.588                19.0                   0         
# Blank card

/THERM_STRESS/MAT/1/1
# func_IDT            Fscale_y
      1003                   0
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#-  2. FUNCTIONS:
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/FUNCT/1003
linear expansion coefficient funtion of temperature
#                  X                   Y
                 273              1.2E-5                                                            
                 800              1.2E-5                                                            
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#enddata
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

Comments

  1. This option overwrites any duplicated parameter from material law.
  2. This option is available for all material laws; except the following:

    LAW0, 5, 6, 11, 21, 26, 37, 41, 46, 51, 54, 97, 108, 113, 151, /MAT/B-K-EPS, /MAT/K-EPS, and /MAT/GAS

  3. This option is compatible with equations of state, /EOS, only when used with the following materials: LAW3, 4, 12, and 49
  4. This option is available for:
    • Shell elements formulations; except DKT18 and T6
    • Solid elements formulations; except PA6
  5. A L and BL are used only for ALE solving.
    • Over melting point Tmelt:(1)
      k = A L + B L . T MathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4Aaiabg2 da9iaadgeadaWgaaWcbaGaamitaaqabaGccqGHRaWkcaWGcbWaaSba aSqaaiaadYeaaeqaaOGaaiOlaiaadsfaaaa@3DF2@
    • In other cases:(2)
      k = A S + B S . T MathType@MTEF@5@5@+= feaahqart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaam4Aaiabg2 da9iaadgeadaWgaaWcbaGaam4uaaqabaGccqGHRaWkcaWGcbWaaSba aSqaaiaadofaaeqaaOGaaiOlaiaadsfaaaa@3E00@
  6. Coupling between ALE and Lagrangian solving is currently not available.