Experimental Study and Simulation of Ultrasonic Vibration Effect on Powder Spreading in Selective Laser Sintering Process, M.Sc. Thesis Sharif University of Technology ; Movahhedi, Mohamadreza (Supervisor)
Abstract
Selective laser sintering is an additive manufacturing technique based on fusion of powder bed, wherein after spreading a powder layer, a focused laser beam directs onto selected points of powder bed to fuse powder particles together. This process is repeated layer by layer until the final part is created. Although utilization of blade as a conventional powder spreading (CPS) mechanism has a good compression ability, the fixed contact line between blade and powder bed surface results in improper powder flowability and increasing shear forces applied on underneath layer. In this study, in order to obtain the basis for conducting practical experiments, discrete element simulation of powder...
Cataloging briefExperimental Study and Simulation of Ultrasonic Vibration Effect on Powder Spreading in Selective Laser Sintering Process, M.Sc. Thesis Sharif University of Technology ; Movahhedi, Mohamadreza (Supervisor)
Abstract
Selective laser sintering is an additive manufacturing technique based on fusion of powder bed, wherein after spreading a powder layer, a focused laser beam directs onto selected points of powder bed to fuse powder particles together. This process is repeated layer by layer until the final part is created. Although utilization of blade as a conventional powder spreading (CPS) mechanism has a good compression ability, the fixed contact line between blade and powder bed surface results in improper powder flowability and increasing shear forces applied on underneath layer. In this study, in order to obtain the basis for conducting practical experiments, discrete element simulation of powder...
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