General Mechanical

General Mechanical

sandwich composite panel

    • Prashank
      Subscriber

      I am trying to simulate a composite sandwich panel with honeycomb at its core. I am using epoxy as adhesive to join the honeycomb to the both facesheets. For this i created a honeycomb structure in a mechanical model and two facesheets in two different aACPs. Then i imported the honeycomb and two facesheets in static structure module( with "transfer shell data " setting for ACPs).


      i also created the legal contacts (formulation= pur penalty) between the honeycomb and facesheet. But when i am trying the  define CZM it does not account the contact.


       


      contact


       


       


       


      czm


      I know in a sandwich panel like this the honeycomb would fail first before the epoxy.But  I want to know the forces at the contact.

    • Wenlong
      Ansys Employee

      Hi Prashank,


      For you cohesive material definition, did you use "separation based" cohesive? We need it to enable contact-based delamination. 


      Bests,


      Wenlong

    • Prashank
      Subscriber
      Hi , wenlong
      I used separation based debonding while defining the cohesive zone in Ansys library.
      So did I used something wrong.?
    • Wenlong
      Ansys Employee

      Hi Prashank,


      It would be hard to tell without taking a look at the model, but you can click on that contact and then click on the "show errors" on the toolbar. The software will tell what is incompatible.



       


      Bests,


      Wenlong

    • Prashank
      Subscriber

      hi wenlog 


      sorry for late reply



       


      in this highlighted error says :


      One or more contact pairs exceeds contact small sliding assumption, check your results carefully.  Consider using Large Deflection or turning off Small Sliding on the offending contact pair(s).  You may select the first offending pair via RMB on this warning in the Messages window.  Additionally, you can use the “Number With Too Much Sliding” Contact Results Tracker to locate any additional pairs.


      i really cant understand whats wrong.

    • Wenlong
      Ansys Employee

      You can try turn off small sliding and see if it works


    • Prashank
      Subscriber
      Hi wenlong
      it doesn't wenlong it doesn't work.
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