General Mechanical

General Mechanical

How to model a delamination in a composite shell by ANSYS apdl?

    • Mehdi Baghaee
      Subscriber

      Hi all,

      I want to model a delamination in a composite shell. For this purpose I want to use element  shell 281 in ANSYS apdl. I meshed two plate exactly in a same location but with different defined cross-sections. I defined contact between them through preprocessor>modeling>create>contact pair, but when I apply force nothing happens between them (only one-sided deflection appears).

      Do you know where the problem is?

      Any comment.

    • Sean Harvey
      Ansys Employee

      Hello,  

      Check the contact normals to make sure they shells are oriented properly with normals pointing to each other. This is the first thing I would try. 

      Regards,

      Sean

    • Mehdi Baghaee
      Subscriber

      I did so, but no succsess. I enclosed file. you can check. 

      https://filebin.net/znscehsg5mhplh5a

      Let me know if there is any sample example for shells contact in Ansys apdl I look at?

      • Sean Harvey
        Ansys Employee

        Hello,

        So, it might be happening is you are loading too quickly and the contact is not detected.  You should turn on auto time stepping (autos, on) and then set the NSUBST command so that you are breaking the load into smaller amounts (set min, max, and initial), as what could be happening is the force you apply is enough to push the parts beyond contact (larger than the contact pinball region).

        Please try this.

        Regards,

        Sean

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