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Experimental and Numerical Investigation of the Ultrasonic Assisted Turning of Aerospace Alloys

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dc.contributor.author Bachir, Elie
dc.date.accessioned 2022-06-22T08:38:06Z
dc.date.available 2022-06-22T08:38:06Z
dc.date.copyright 2021 en_US
dc.date.issued 2021-12-21
dc.identifier.uri http://hdl.handle.net/10725/13739
dc.description.abstract The rise in need for aerospace production is directly impacted by the machinability of materials used in aerospace parts. The Ultrasonic Assisted Turning is steadily becoming a research focus as an eco-friendly and cost-efficient unconventional machining method. It has been shown to enhance the machinability of various materials by creating a separation between the tool and the workpiece. The increase in demand for aerospace production created a need for a better understanding of this method’s effect on the machinability of aerospace materials. This research investigates the effect of the Ultrasonic Assisted Turning method on aerospace titanium alloy Ti-6Al-4V and low carbon steel A36. The effect of adding a cryogenic coolant to the ultrasonic machining of titanium alloys is also investigated. The investigation focuses on the variation of the cutting parameters, where the cutting speed and the depth of cut are varied to determine their effect on the machinability of the aerospace materials in Ultrasonic Assisted Turning. The study begins with experimental investigation of the cutting forces and surface roughness for different cutting parameters. Tool wear analysis is then conducted for the optimal cutting parameters. The separation is then investigated theoretically. A Finite Element Model (FEM) is then developed to simulate the cutting conditions and investigate the processes involved in Ultrasonic Assisted Turning for a better understanding of its effect on the machinability of titanium and steel alloys. It is shown that the smallest cutting speed and depth of cut lead to the largest reduction in the cutting forces and enhancement in tool wear whereas the largest cutting speed resulted in the largest reduction in surface roughness. The Ultrasonic Assisted Turning was found to decrease adhesion and microchipping. The theoretical investigation proves the presence of separation. The theoretical and the FEM results show that the separation duration decreases as the cutting speed and depth of cut increase. The temperature, strain rate and stress profiles are extracted from the FEM and are used to provide a better understanding of the ultrasonic effect on the machinability of these alloys. The combined effect of the strain rates and temperature is dominated by the softening caused by the increase in temperature. The addition of a coolant is shown to limit the benefits of this method. This research provides a better understanding of the beneficial effect of the Ultrasonic Assisted Turning on the machinability of titanium and steel alloys.’ en_US
dc.language.iso en en_US
dc.subject Titanium alloys -- Machinability en_US
dc.subject Titanium alloys en_US
dc.subject Ultrasonic testing en_US
dc.subject Aeronautics -- Materials en_US
dc.subject Lebanese American University -- Dissertations en_US
dc.subject Dissertations, Academic en_US
dc.title Experimental and Numerical Investigation of the Ultrasonic Assisted Turning of Aerospace Alloys en_US
dc.type Thesis en_US
dc.term.submitted Fall en_US
dc.author.degree MS in Industrial Engineering And Engineering Management en_US
dc.author.school SOE en_US
dc.author.idnumber 201404760 en_US
dc.author.commembers Ammouri, Ali
dc.author.commembers Zgheib, Nadim
dc.author.department Industrial And Mechanical Engineering en_US
dc.description.physdesc 1 online resource (xiv, 125 leaves): ill. (some col.) en_US
dc.author.advisor Bejjani, Roland
dc.keywords Ultrasonic Assisted Turning en_US
dc.keywords Titanium en_US
dc.keywords Steel en_US
dc.keywords FEM en_US
dc.keywords Machinability en_US
dc.description.bibliographiccitations Includes bibliographical references (leaf 85-91) en_US
dc.identifier.doi https://doi.org/10.26756/th.2022.186
dc.identifier.doi https://doi.org/10.26756/th.2022.187
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/thesis.php en_US
dc.publisher.institution Lebanese American University en_US
dc.author.affiliation Lebanese American University en_US


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