Thermoelastic simulations Answered

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Piotr Kijanka

Hello,

Does OnScale support thermoelastic simulations? In other words, I would like to simulate a laser pulse thermal excitation and then measure displacements or stresses generated on a metallic structure generated by thermal gradients. How to apply a temperature profile as excitation force?

Thanks,
Piotr

5 comments

  • Official comment
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    Chloe Allison

    Hi Piotr,

     

    Yes this is possible in OnScale. Here is an example that should help you get an idea of how to set this up.

     

    Best Regards,

    Chloe

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  • Avatar
    Piotr Kijanka

    Hi Chloe,

    Thank you for sharing the file. It is very helpful. I have modified my code following your example and it seems to be OK however, it can not generate stresses from the thermal excitation. I have activated the thermal solver, and applied boundary conditions in a way as below:

    boun
      side xmin absr
      side xmax absr

      side ymin symm
      side ymax absr

      side zmin free

      defn zmxt tmpr func
      symb bxmin = 0.0049 * $coordFactor - $box
      symb bymin = -1e-10 * $coordFactor - $box
      symb bzmin = 0.001 * $coordFactor - $box
      symb #get { is js ks } clsnode $bxmin $bymin $bzmin
      symb bxmax = 0.0051 * $coordFactor + $box
      symb bymax = 0.0001 * $coordFactor + $box
      symb bzmax = 0.001 * $coordFactor + $box
      symb #get { ie je ke } clsnode $bxmax $bymax $bzmax
      node $is $ie $js $je $ks $ke alum void
    end

    Could I send to you my code for a veryfication?

    Thanks,

    Piotr

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  • Avatar
    Chloe Allison
    (Edited )

    Hi Piotr,

     

    Yes of course, send your files to us and I will take a look for you.

     

    Best Regards,

    Chloe.

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  • Avatar
    Grünsteidl Clemens

    Hi Chloe and Piotr,

    I try to do same thing - modelling thermo-elastic generation of US. I studied the linked example from Chloe and was basically able to adapt it to my needs. Except for one thing: If in this example I change the thermal source definition (line 165) from

    defn ymxt tmpr func

    to

    defn ymxt flux func

    it seems to be no longer working - temperatures and displacements are all zero. However, using "flux" and setting "cupl off" produces a fine temperature field. 

    Is it supposed not to work using "flux"? If so, does this have physical reasons?

     

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  • Avatar
    Grünsteidl Clemens

    This links also to this post: https://support.onscale.com/hc/en-us/community/posts/360012391697-Thermal-Flux-BC 

     

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