Numerical and experimental study of the powder bed characteristics in the recoated bed of the additive manufacturing process

Conference contribution


Publication Details

Author(s): Schiochet Nasato D, Heinl M, Hausotte T, Pöschel T
Editor(s): V International Conference on Particle-based Methods – Fundamentals and Applications PARTICLES 2017
Publication year: 2017
Pages range: 429-439
Language: English


Abstract


Part of the optimization steps for additive manufacturing is related to the correct understanding of the mechanical behavior of the powder used in the process. Obtain this understanding based purely on experiments might be a difficult and sometimes prohibitive task. A particle-based numerical tool can provide critical information for correct understanding of powder deposition process. Numerical simulations through the Discrete Element Method (DEM) provide a useful mean to investigate the additive manufacturing process, given the possibility to study particle-scale information that are difficult to access experimentally. The characteristics of the recoated powder bed are investigated in the packed bed region and onto the manufactured part using PA12 commercial powder. Particle size distribution, contact and non-contact cohesive forces are incorporated in the numerical model. Furthermore, the non-spherical shape of real particles is taken explicitly into account in numerical simulations. A blade-type recoating system is used to form the powder bed and its roughness is calculated. Experimental measurements are performed by fringe projection. Several areas of the recoated powder layers can be scanned with this optical measurement method. Thus, the analyzed surface roughness can be compared with the simulated quantities to validate the numerical model. The sintered part is modelled as a prescribed rigid static region in the simulated system. The powder recoated in the sintered region may have different characteristics (packing, roughness) compared to the powder bed region. Recoating process is modelled using two different shapes for the sintered region. The amount of material recoated and the surface roughness are then calculated for the powder bed as well as for the sintered region



FAU Authors / FAU Editors

Hausotte, Tino Prof. Dr.-Ing.
Lehrstuhl für Fertigungsmesstechnik
Heinl, Martin
Lehrstuhl für Fertigungsmesstechnik
Pöschel, Thorsten Prof. Dr.
Lehrstuhl für Multiscale Simulation of Particulate Systems
Schiochet Nasato, Daniel Dr.
Lehrstuhl für Multiscale Simulation of Particulate Systems


How to cite

APA:
Schiochet Nasato, D., Heinl, M., Hausotte, T., & Pöschel, T. (2017). Numerical and experimental study of the powder bed characteristics in the recoated bed of the additive manufacturing process. In V International Conference on Particle-based Methods – Fundamentals and Applications PARTICLES 2017 (Eds.), (pp. 429-439). Hannover, DE.

MLA:
Schiochet Nasato, Daniel, et al. "Numerical and experimental study of the powder bed characteristics in the recoated bed of the additive manufacturing process." Proceedings of the International Conference on Particle based Methods, Hannover Ed. V International Conference on Particle-based Methods – Fundamentals and Applications PARTICLES 2017, 2017. 429-439.

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Last updated on 2018-19-04 at 04:02