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    • Rahul Ponginan

      Please click here for a short but important announcement   03/26/17

      Dear Users Our Commercial and Academic users around the world can use these same forums here as before i.e. the Altair Support Forum , Commercial users from India with solver queries can go to the Solver Forum for India Commercial Users , Academic Users from India and AOC India Participants are requested to go to the Forum for India Academic Users and AOC India Participants , We will be tending to all queries in all the forums promptly as before, thank you for your understanding. 

H. Huebner

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About H. Huebner

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  1. material orientation for honeycomb modelling with /PROP/TYPE6

    Hi George, how exactly did you Isolate the core? Did you delete all components accept of the core in the radioss file?
  2. material orientation for honeycomb modelling with /PROP/TYPE6

    Hi George, The shear modules are different in my model (G23=25; G13=40). So actually the shear stress results should be different if i Change the skew even if E11=E22. Do you have any idea why it does not work?
  3. material orientation for honeycomb modelling with /PROP/TYPE6

    This is the same material model, with E11=E22=1; G12=25; G23=40; The shear stress is direction dependent as you can see. Therefore a Change of the skew should Change the results. In the single element case it does, but in the main_Retainer_0000.rad model it does not.
  4. material orientation for honeycomb modelling with /PROP/TYPE6

    Hi George, The shear modules are different in my model (G23=25; G13=40). So actually the shear stress results should be different if i Change the skew even if E11=E22. Do you have any idea why it does not work?
  5. material orientation for honeycomb modelling with /PROP/TYPE6

    I checked it already in HyperCrash and HyperCrash takes it into acount. But i get the same results anyway if i change the skew. The right models skew is rotated 90° by the z-axis but the results are the same:
  6. material orientation for honeycomb modelling with /PROP/TYPE6

    Hello George, please find attached the model files main_Retainer_0001.rad MaterialDataBase.rad Retainer_0000.rad main_Retainer_0001.rad
  7. material orientation for honeycomb modelling with /PROP/TYPE6

    Hello George, Thanks for your reply. I've tried to assign the orientation using the vector base node and vector end node Option. In one case the local vector i defined corresponds to the global X axis and in the other case to the global Y axis. But the Problem still persists so i receive same results in both cases. Please find attached the .out files of both models Core_0000.out reverseCore_0000.out
  8. Im trying to model a solid honeycomb core with MAT28 and PROP6. I'm using a local coordinate System (/SKEW/FIX with Ip=0) to define material orientation. I tried to Change the local coordinate System but the solver always refers to the global coordinate System. A change of the local coordinate System does not affect a change of the material orientation therefore i'm not able to define the material orientation with a local coordinate system. Can anyone help me with this issue? Best regards
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