Analyse de la sensibilité et des domaines de validité des modélisations analytiques de la coupe.
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The determination of all the 6 mechanical actions of cutting processes is very interesting for modeling of milling, turning and drilling in order to optimize the geometric parameters, kinematic, improve the quality of the obtained surface and the tool life. Analytical or semi-analytical models of cutting often give an order of the mechanical action magnitude in the cutting tool tip. The interest of these models is linked to the rapidity of the results obtaining and to the moderate cost compared with experimental approach In the literature there are several main analytical models (Merchant model – 1945, thermomechanical Oxley models -1980, Gilormini -1982 and Dargnat -2006). They are analyzed in this work, paying particular attention to their validity domains. Thus, the effects of variation of each parameter on the geometric and kinematic results obtained by each of the models are presented and compared, taking into account the specific modeling assumptions. This study will be conducted in orthogonal cutting configuration, because of its simplicity for modeling the cutting process, this configuration assumes that the cutting edge is perpendicular to the cutting speed and feed directions.
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Article dans une revue avec comité de lectureZOUABI, Haythem; CALAMAZ, Madalina; WAGNER, Vincent; CAHUC, Olivier; DESSEIN, Gilles (Springer Science and Business Media LLC, 2023-01)Orthogonal cutting on Ti-6Al-4V produces segmented chips which results from localized deformation within the Primary Shear Zone (PSZ). For in situ visualization of the material flow during Ti-6Al-4V chip formation, a new ...
Uncertainty reduction in residual stress measurements by an optimised inverse solution using nonconsecutive polynomials Article dans une revue avec comité de lectureBRÍTEZ, Diego L.; PRIME, Michael B.; WERDA, Sana; LAHEURTE, Raynald; DARNIS, Philippe; CAHUC, Olivier (Wiley, 2022-11-08)Many destructive methods for measuring residual stresses such as the slittingmethod require an inverse analysis to solve the problem. The accuracy of theresult as well as an uncertainty component (the model uncertainty) ...
Article dans une revue avec comité de lectureALONSO, Unai; CALAMAZ, Madalina; GIROT, Franck; IRIONDO, Edurne (Society of Manufacturing Engineers, 2019)Hybrid stacks made of carbon reinforced plastic (CFRP) and Ti-6Al-4 V alloy (Ti) are often drilled together to reduce positional errors, enhance tight tolerances and minimize machining time. However, this is a complex task ...
A new material model for 2D numerical simulation of serrated chip formation when machining titanium alloy Ti-6Al-4V Article dans une revue avec comité de lectureA new material constitutive law is implemented in a 2D finite element model to analyse the chip formation and shear localisation when machining titanium alloys. The numerical simulations use a commercial finite element ...
Toward a better understanding of tool wear effect through a comparison between experiments and SPH numerical modelling of machining hard materials Article dans une revue avec comité de lectureLIMIDO, Jérôme; NOUARI, Mohammed; ESPINOSA, Christine; COUPARD, Dominique; SALAUN, Michel; GIROT, Franck; CHIERAGATTI, Rémy; CALAMAZ, Madalina (Elsevier, 2009)The aim of this study is to improve the general understanding of tungsten carbide (WC–Co) tool wear under dry machining of the hard-to-cut titanium alloy Ti6Al4V. The chosen approach includes experimental and numerical ...