Modélisation numérique par éléments finis et comparaison entre la flexion et quatre points d'une poutre à la rupture

Abstract

This master's thesis is a comparative study, by the first approach called strength of of materials, based on the simulation of the three and four points bending of a beam without cracks by the finite element software RDM6, developed by the Le MANS university of France ; and by the second approach called fracture mechanics of the two previous stresses, by simulation of the three and four point bending of the same beam at fracture, by the fracture analysis code Franc2D (in English fracture analysis code 2 dimensions ), developed by Cornell Fracture Group, and Cornell University, of United States of America (USA), for the determination of the stress intensity factors KI for different distances from the middle em of the beam to be studied, which led us to calculate the critical crack lengths aC for each case of the previous removals.