Experimental and numerical approaches of Laser assisted turning
Article dans une revue avec comité de lecture
This study shows experimental and numerical preliminary approaches of laser assisted machining. The laboratory has an industrial lathe equipped with a laser source with 2.5 kW to carry out experiments on various materials. This machine is instrumented for the measurement of cutting forces and thermal fields (infra-red camera). Our aim is to show the viability of the process in industry. After a presentation of laser assisted machining, we will detail the laser heating modelling, and the first steps of a cutting modelling with laser assistance, for the comprehension of thermomechanical phenomena. Then we will present the effect of the laser assistance, on the cutting force and the surface quality when machining a traditional steel, and on the field of the residual stresses after machining of a hardened bearing (55 HRc).
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Article dans une revue avec comité de lectureACHOURI, Mohamed; GERMAIN, Guénaël; DAL SANTO, Philippe; LEBRUN, Jean-Lou; SAIDANE, Delphine (Trans Tech Publications, 2011)This work deals a contribution to ductile damage of High-Strength Low-Alloy (HSLA) steel steels under low stress triaxiality. This work is based on micrographics observations and in situ shear tests to examine the evolution ...
Article dans une revue avec comité de lectureGERMAIN, Guénaël; DAL SANTO, Philippe; LEBRUN, Jean-Lou (Elsevier, 2011)Laser Assisted Machining (LAM) improves the machinability of materials by locally heating the workpiece just prior to cutting. Experimental investigations have confirmed that the cutting force can be decreased, by as much ...
Article dans une revue avec comité de lectureBRAHAM-BOUCHNAK, Tarek; GERMAIN, Guénaël; ROBERT, Patrick; LEBRUN, Jean-Lou; AUGER, Stéphane (Springer Verlag, 2010)High pressure water jet assisted turning (HPWJAT) consists of projecting a high pressure water jet, up to several hundred bar, into the tool-workpiece interface. The water jet is directed between the chip and the tool ...
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Modelling, identification and application of phenomenological constitutive laws over a large strain rate and temperature range Article dans une revue avec comité de lectureHOR, Anis; MOREL, Franck; LEBRUN, Jean-Lou; GERMAIN, Guénaël (Elsevier, 2013)A review of the different phenomenological thermo-viscoplastic constitutive models often applied to forging and machining processes is presented. Several of the most common models have been identified using a large ...