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validation

    • up1057819
      Subscriber
      Hello everyone, 
       
      I am trying to validate a model of a honeycomb unit cell with Ansys Mechanical APDL. In order to validate the model, I am trying to calculate the Young and shear modulus and compare them with the analytical equations from the book of Gibson & Ashby. 
      My model consists of a regular hexagon ( l=h, θ=30 ) and I am applying a uniform displacement (seen in the photo below )  calculating the reaction force of the nodes at the bottom where the model is constrained and with Hookes law calculating E ( out of plane ).
      (degree of freedom of the top nodes have been coupled in the Uy, longitude direction green mark in the model ) 
       
      The results I get from the theoretical equations and the model have a deviation of 20% more or less which they shouldn't have. 
       
      What could possibly be wrong? 
       
      Thanks a lot!
    • Ashish Khemka
      Ansys Employee

      Hi Anotn,

      You cannot calculate Young's modulus and Shear modulus - they are input to be provided by the user for the analysis.

      Regards,

      Ashish Khemka

      • up1057819
        Subscriber

        Hello Ashish Khemka,

         

        And how do you validate that your model is working properly? 

    • Ashish Khemka
      Ansys Employee

      Anton, you will need to have experimental data or any other analytical calculations (like deformation and stress) to compare with the analysis results.

       

      Regards,

      Ashish Khemka

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