Development of a Hyperelastic Constitutive Model Based on the Crystal Plasticity Theory for the Simulation of Machining Operations
Communication avec acte
In this work, a hyperelastic constitutive model is developed to describe the thermo-mechanical behavior of the Ti17 titanium alloy. The grain shape and the crystallographic orientation are explicitly taken into account. The behavior of both the α and β phases is modelled with a crystal plasticity formulation coupled to a CDM (Continuum Damage Model). The constitutive model is implemented in the ABAQUS/Explicit finite element solver with a user-defined subroutine. The model parameters are identified from experimental tests. According to the cutting simulation results, both strain localization and chip segmentation are strongly impacted by the crystallographic orientation.
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Communication avec acteBEN BOUBAKER, Houssem; AYED, Yessine; MAREAU, Charles; GERMAIN, Guénaël (AIP Conference Proceedings, 2018)For metallic materials, fabrication processes (e.g. machining and forging) may involve important strain rates and high temperatures. For such severe loading conditions, the development of damage is often associated with ...
Impact of the initial microstructure and the loading conditions on the deformation behavior of the Ti17 titanium alloy Article dans une revue avec comité de lectureBEN BOUBAKER, Houssem; MAREAU, Charles; AYED, Yessine; GERMAIN, Guénaël; TIDU, Albert (Springer Verlag, 2019)In this work, the impact of the microstructure and the loading conditions on the mechanical behavior of a β-rich Ti17 titanium alloy is investigated. For this purpose, two different initial microstructures are considered ...
Article dans une revue avec comité de lectureAYED, Yessine; GERMAIN, Guénaël; BEN SALEM, Wacef; HAMDI, Hédi (Elsevier, 2014)Laser-assisted machining combines several experimental parameters such as cutting speed, feed rate, depth of cut, laser power and distance between tool rake face and the laser beam axis. The optimization of these parameters ...
Experimental Study of tool Wear Mechanisms in Conventional and High Pressure Coolant Assisted Machining of Titanium Alloy Ti17 Article dans une revue avec comité de lectureAYED, Yessine; GERMAIN, Guénaël; AMMAR, Amine; FURET, Benoit (Trans Tech Publications, 2013)Titanium alloys are known for their excellent mechanical properties, especially at high temperature. But this specificity of titanium alloys can cause high cutting forces as well as a significant release of heat that may ...
Development of a numerical model for the understanding of the chip formation in high-pressure water-jet assisted machining Article dans une revue avec comité de lectureAYED, 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 ...