engleski

A yield criterion of isotropic materials with different tensile and compressive yield point

General tensor expression for a yield criterion containing stress tensor raised to the zeroth, first and second power has been considered, if tensile and compressive plasticity (strength) properties are different, then three independent parameters rather than one, as it is the case of materials with equal tensile and compressive properties, have to be used. It is convenient to define these properties as tensile and compressive yield points as well as shearing yield point. Furthermore, it has been shown that the first stress invariant explicitly influences yielding, unlike materials with equal tensile and compressive properties.

isotropic materials

nije evidentirano