RESISTANCE DES MATERIAUX

PROPRIETE

SOMMAIRE

1. DEFINITION……………………………………………………………………………………………………………………………………………………………………..4

2. EFFORT NORMAL N………………………………………………………………………………………………………………………………………………………5

3. CONTRAINTE NORMALE ^ …………………………………………………………………………………………………………………………………………6

4. CONDITION DE RESISTANCE……………………………………………………………………………………………………………………………………..7

5. DEFORMATIONS…………………………………………………………………………………………………………………………………………………………….7

5.1 ALLONGEMENTS……………………………………………………………………………………………………………………………………………………………7

5.2 CONTRACTION LATERALE – COEFFICIENT DE POISSON ^………………………………………………………………………………………………8

6. RELATION CONTRAINTES – DEFORMATIONS………………………………………………………………………………………………………9

6.1 LOI DE HOOKE………………………………………………………………………………………………………………………………………………………………9

6.2 EXEMPLES DE VALEURS DE MODULE D’YOUNG…………………………………………………………………………………………………………….9

6.3 ESSAI DE TRACTION…………………………………………………………………………………………………………………………………………………….10

7. CONCENTRATION DE CONTRAINTES……………………………………………………………………………………………………………………10

8. CONTRAINTES DANS UNE SECTION INCLINEE………………………………………………………………………………………………….13