Multiaxial Failure Criteria

In the usual tests to determine strength or lifetime under tension, bending or compression loading a uniaxial stress state is present. In components very often multi-axial stresses occur. Also under uniaxial external loading multiaxial stresses are possible, for instance in notched components. Rotating structures and components under internal pressure exhibit multiaxial stresses. Also thermal stresses are in general multiaxial. In this section, failure criteria under multiaxial loading are presented.