All
Thanks for the replies and sorry for the spelling. This is a general question for our engineers in the design of aircraft support equipment. Currently some our engineers use Von Mises while other’s use the max/min principal stress. Clearly we all should be designing the same way...
Given the legal design requiremnt: The Stress level, under load condition, at any point in the structure shall be limited to a level that provides a safety factor of 3 against permanent deformation.
Whould you use Von Mises or Max Principle in your FEA modle?