CONTACT FORCES IN LSDYNA

- November 8, 2023 at 6:40 am
  
  Fady Elshazly
  Bbp_participant
- November 9, 2023 at 2:43 pm
  
  Aniket
  Forum Moderator
  
  Can you please explain your query in some more details?
  -Aniket
  Forum Rules & Guidelines
  - November 9, 2023 at 5:49 pm
    
    Fady Elshazly
    Bbp_participant
    
    Hello,
    I am using Automatic contact surface to surface to model the contact between two objects in LSDYNA. the first one is a horizontal mat with prescribed three components earthquake. The second object is a cylinder overlying this mat. Under the input motion,the mat starts moving and the cylinder starts moving and may have an uplift. Is there a way to check the contact any type of results to know if there is a total uplift (separation) between the two objects meaning that no contact points between both objects.
    
    Thanks
    
    Thanks
- November 10, 2023 at 2:47 pm
  
  Alex R.
  Ansys Employee
  
  Hello,
  In the desribed case it would be recommended to define the mat as SURFA and the cylinder as SURFB in *CONTACT_AUTOMATIC_SURFACE_TO_SURFACE (SURFATYP = 3, SURFBTYP = 3). Adding keyword *DATABASE_RCFORC will provide a data about contact forces between the mat and cylinder.
  Please let me know how it goes.
  Alex