http://www.iaeme.com/IJMET/index.asp 200 editor@iaeme.com International Journal of Mechanical Engineering and Technology (IJMET) Volume 8, Issue 1, January 2017, pp. 200–207, Article ID: IJMET_08_01_022 Available online at http://www.iaeme.com/IJMET/issues.asp?JType=IJMET&VType=8&IType=1 ISSN Print: 0976-6340 and ISSN Online: 0976-6359 © IAEME Publication BEHAVIOR TO DAMAGE OF TWO HARDENING PRECIPITATION COPPER ALLOYS: EXPERIMENTAL CHARACTERIZATION AND NUMERICAL STUDY B. Saadouki Laboratory of Control and Mechanical Characterization of Materials and Structures, National Higher School of Electricity and Mechanics, BP 8118 Oasis, Hassan II University, Casablanca, Morocco J. Nattaj Laboratory of Atmosphere’s Physics and Modeling, FST Mohammadia, Hassan II University, Casablanca, Morocco M. Elghorba Laboratory of Control and Mechanical Characterization of Materials and Structures, National Higher School of Electricity and Mechanics, BP 8118 Oasis, Hassan II University, Casablanca, Morocco ABSTRACT 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. Key words: Cuprous, notch, damage-reliability, ultimate residual stress, life fraction Cite this Article: B. Saadouki, J. Nattaj and M. Elghorba. Behavior to Damage of Two Hardening Precipitation Copper Alloys: Experimental Characterization and Numerical Study. International Journal of Mechanical Engineering and Technology, 8(1), 2017, pp. 200–207. http://www.iaeme.com/IJMET/issues.asp?JType=IJMET&VType=8&IType=1 1. INTRODUCTION The electrical interconnection evolves rapidly, whether it is in the electronic domain (component support grids, contacts), or in the connectivity domain (Clips, spades, connectors). The dimension of pieces, conveying the electrical current, decreases incessantly. On the other hand, the contact shape complexity is only in increase. The alloy and cuprous half products manufacturers are consequently submitted to the following challenge: increasing the electrical and thermal conductivity of conventional alloys in order to