CONTRAINTES PRINCIPALES : Cours et exemples d'application

This video is dedicated to principal stresses. We begin by defining the principal stresses and directions. Then, we formulate the characteristic polynomial of the stress tensor matrix, which is expressed in terms of the stress tensor invariants. Solving the equation of this polynomial allows us, depending on the case, to determine the principal stresses. The calculation methodology is well-developed; two application examples are given to facilitate understanding of principal stress resolution.