Ls-Dyna *CONTACT

Ls-Dyna *CONTACT_ENTITY

- February 18, 2022 at 6:24 pm
  
  king79
  Subscriber
  
  Hi
  I am trying to model the interaction between two parts using *CONTACT_ENTITY in Ls-Dyna. I keep getting the following error message:
  *** Error 20953 (STR+953)
     entity number= 1 local X vector has zero length.
  *** Error 20954 (STR+954)
     entity number= 1 local Y vector has zero length.
    *** Error 20018 (STR+18)
     input phase completed with 2 fatal errors
  I have checked the Ls-Dyna manual but cannot find a solution to this problem. Do you have any suggestions? Thanks
- February 21, 2022 at 7:29 pm
  
  tslavik
  Ansys Employee
  
  You must define local axes on Cards 3 and 4 of *CONTACT_ENTITY with the variables AX, AY, AZ and BX, BY, BZ. Presently, it seems they are defined as "0" or otherwise invalid. Please refer to Remark #3 of *CONTACT_ENTITY for more details.

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