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Failure Envelope

mohamedlamine's picture

A finite element software computes the stresses and/or strains sets values at each dynamic iteration step. These values can be plotted on a stress-space giving several failure envelopes. For an isotropic or an homogeneous mixture the Von Mises criterion represents an ideal envelope which may not coincide with the available envelopes but the stresses values can be checked with the material strength.

It is also noticed that composite materials use maximum stress and strain criteria, the Tsai and Wu interaction criterion as a generalized Von Mises, or the quadratic failure criterion of Hill.

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