Learning Forum

[Noah]

Hello,

I have tried to simulate the crash behavior of crash boxes under different temperatures.
I am using the material model MAT_015. Unfortunately, the simulation does not show any significant differences between the different temperatures (in contrast to previous tests).
For the thermal analysis I use
- INITIAL TEMPERATURE
- CONTROL_THERMAL_SOLVER
- CONTROL_SOLUTION
- CONTROL_THERMAL_TIMESTEP
- T01_THERMAL_ISOTROPIC

KEYWORDS

*CONTROL_SOLUTION
$#    soln       nlq     isnan     lcint     lcacc     ncdcf     nocop     
         2         0         0       100         0         1         0
*CONTROL_THERMAL_SOLVER
$#   atype     ptype    solver         -       gpt    eqheat     fwork       sbc
         1         0        11                   8       1.0       1.0       0.0
*CONTROL_THERMAL_TIMESTEP
$#      ts       tip       its      tmin      tmax     dtemp      tscp      lcts
         0       0.5     0.001       0.0       0.0       1.0       0.5         0

*MAT_THERMAL_ISOTROPIC
$#    tmid        ro     tgrlc    tgmult      tlat      hlat    
         1       0.0       0.0       0.0       0.0       0.0
$#      hc        tc  
5.000000E8    0.0162

*INITIAL_TEMPERATURE_SET
$#    nsid      temp       loc   
         1     260.0         0

Why does it show no differences when I change the INITIAL_TEMPERATURE?
Am I using the wrong solver? Or the wrong T01 model?

Regards
Noah

[Jim Day]

 

Set NEIPH=5 (if solids) or NEIPS=5 (if shells) in *DATABASE_EXTENT_BINARY to write out 5 extra history variables.  The 5th such variable for MAT_015 is T – Troom.   Check the value of that variable to confirm its initial value is the initial temperature per *INITIAL_TEMPERATURE minus TR in *MAT_015.