1Department of Mechanic, University of Mostaganem, 27000 - Algeria.
2Laboratory of mechanics of contacts and the solid, INSA-Lyon, France.
3Department of Electronic, University of Mostaganem, 27000, Algeria.
A series of mechanical tests were carried out characterize the behaviour and rupture of steel 42 CD 4. The behaviour is studied from tests of traction, resilience and hardness as a function of tempering treatment at 200°C, 400°C and 600°C. The aim of this study is, on the one hand, to obtain experimental data in order to validate the implementation of models and the simulation of the test and to warn of rupture risk that can be avoided when the structure is well - dimensioned.
The in - service behaviour is expressed by tenacity, which is defined by the stress intensity factor KIC, determined in mode I, and in plane strain state conditions. Various approaches have been developed to describe the toughness phenomenon. The model taken into consideration in this work is the model of Paris. We developed a numerical method of evaluation of crack propagation to estimate the two parameters (C, m) of the Paris’ law.
Material, heat treatment, crack propagation, law of Paris, rupture
