General Mechanical

General Mechanical

Three Point Bending Test of Honeycomb structure

    • vkumarsingh388
      Subscriber

      Hey,


      I  want to do 3 point bending test on honeycomb structure according to astm c393 but i don't know  how to do it ,


      I have made honeycomb structure using surfaces.


      The whole structure consists of surfaces.


      I don't know whether to do it by making rollers or by without making rollers.


      I have to do  Three Point Bending test both static and fatigue.


      i need to validate this paper:- https://www.sciencedirect.com/science/article/pii/S1018364717310339


    • peteroznewman
      Subscriber

      Note: vkumarsingh388 has read this Discussion and needs more help.


      I recommend you do everything I said in that discussion, which includes a displacement boundary condition that represents a frictionless "roller" support.



      What specifically do you not know how to do?

    • AchilleasMil
      Subscriber

      Hey,


       


      The best thing you can do is use the symmetry of the sandwich panel as suggested in the other post (1/4th or 1/2 of the probe), then to apply the force as suggested also with a remote force boundary condition choosing the preffered behavior between coupled and deformable while for the supports, what I found closer to reality was just to apply a remote displacement boundary condition on the center/middle line of the (imaginary) support rollers with only the Z Deformation set as zero and all the others free. 


       


      If you want to get more closer to the C393 ASTM rules you could check out giving a remote displacement on the middle top of the sandwich which would change constantly in relevance with the time, with a given velocity as given from the norm. That could be as said the case if you don't want to give a force value of your own.


       


      That's a nice paper really curious how you found it..? Thanks!


      Best regards,


      Achilleas


       


       

    • vkumarsingh388
      Subscriber

      How can i apply force or displacement along a line in middle of face as i have tried to draw a line on face in DM and after transmititng it to Mechanical it just disappear.


      Hey AchilleasMil, do you find any tutorial that can help me in this because i have never use remote force or displacement before (I am new to simulation).


      BTW i found that paper by searching on google, I have downloaded so many papers on honeycomb and accidently i found this one also.


       Here is the link to zip file of geometry:- Rar

    • vkumarsingh388
      Subscriber
      Hey peter I have tried to draw the line on face of geometry for applying force on it but it just disappear, do i am forgotting something?
      Please suggest me, i have watched your video on ANSYS FEA EXAMPLE channel on youtube.
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