Orthogonal micro-cutting modeling of the Ti17 titanium alloy using the crystal plasticity theory
TypeArticles dans des revues avec comité de lecture
Articles dans des revues avec comité de lecture
The development of computation means has allowed the simulation of complex mechanical problems. The first simulations of manufacturing processes at the microstructure scale, namely in the field of machining, have recently emerged. In this study, and on the basis of previous research, a novel approach to machining simulation is proposed. A crystal plasticity behavior law has thus been implemented and its parameters have been identified, for each of the two phases constituting the material. This is achieved through experimental tests conducted under extreme conditions of temperature and strain rates. Numerical models are composed of grains in the form of Voronoï cells. Random crystal orientations have also been assigned to each grain. This has subsequently allowed the simulation of the machining process. Access to local physical parameters such as crystal orientations, their evolution and phase transition thus presents a major breakthrough in this field.
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Development of a numerical model for the understanding of the chip formation in high-pressure water-jet assisted machining AYED, Yessine; ROBERT, Camille; GERMAIN, Guénaël; AMMAR, Amine (Elsevier, 2016)The aim of this study is to develop a new numerical cutting model that includes fluid structure interaction and to take into account heat transfer between the water-jet, the workpiece and the chip. This has been achieved ...
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AYED, Yessine; GERMAIN, Guénaël; AMMAR, Amine; FURET, Benoit (Springer, 2016)Understanding the physics of chip formation in machining operations is often difficult due to the complexity of the phenomena involved, such as the extreme and complex loading conditions that occur in the cutting zone. In ...
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Tool wear analysis and improvement of cutting conditions using the high-pressure water-jet assistance when machining the Ti17 titanium alloy AYED, Yessine; GERMAIN, Guénaël; AMMAR, Amine; FURET, Benoit (Elsevier, 2015)This paper presents experimental results concerning the machinability of the titanium alloy Ti17 with and without high-pressure water jet assistance (HPWJA) using uncoated WC/Co tools. For this purpose, the influence of ...