BEHAVIOR TO DAMAGE OF TWO HARDENING PRECIPITATION COPPER ALLOYS: EXPERIMENTAL CHARACTERIZATION AND NUMERICAL STUDY

In this work, we basically want to compare the mechanical behavior of two cuprous precipitation hardening. In the first part, we characterized experimentally both cuprous by simple tensile tests, the Cu-Ni-Si displays a more interesting mechanical behavior that Cu-Co-P. For the second part, the damage behavior has been studied numerically by measuring the variation of the ultimate residual stress as a function of the notch length; this parameter reflects the strength loss for tensile test. We have reproduced the phenomenon of damage faced during the deterioration of materials through a static damage theory and a reliability optimization of damage. The specimens underwent progressive damage progressively as their notches become larger until they arrive at failure, the evolution of the damage starts with an introductory stage followed by propagation of damage to major notches and finally a brutal damage leads to failure. This study has reliably predicted the fracture behavior for these cuprous.