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  1. Hi, How to create a sliding contact in Nastran Userprofile in Hypermesh? What will be the contact type needed to be selected while creating the Interfaces (Groups) How to map the slave and master contact surfaces??
  2. Helo, I am conducting strength analysis on steel cast components. While analysisg the results, which failure theory I should follow? Max. principal stress theory or von Mises theory ? and what stress I should look for? vonmises or max principal stress? how exactly I should decide whether a particular material is ductile or brittle ?? Thanks.
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