Structural & Thermal

Structural & Thermal

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  3. For older Workbench releases, NEQIT,1,FORCE was issued for a model with all linear contacts. Why does Workbench not issue this command starting R18.2 onwards for the same model?

For older Workbench releases, NEQIT,1,FORCE was issued for a model with all linear contacts. Why does Workbench not issue this command starting R18.2 onwards for the same model?

Tagged: 19, contact, General, mechanical, structural-and-thermal, structural-mechanics
    • March 17, 2023 at 9:00 am
      FAQFAQ
      Participant

      This is related to the “small sliding” option which was introduced in R18.2. In 18.2, ANSYS introduced small sliding formulation for contacts. See Knowledge Article#2051175 to find what does the option “small sliding” do in a contact analysis? When small sliding is set to program controlled, by default it is set to ON for all contact types when large deformation is set to off. In addition, it is always set to On for bonded contacts. An advantage of small sliding contact is that it truly ‘linear’ in formulation. Thus, if you have KEYOPT(18)=1 set, you don’t need to ‘force’ a linear solution with NEQIT,1,FORCE. One may check, in help document, Section 3.9.13.4 “Specifying Linear Contact” for further details.

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