| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Hulsen, Martien A.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2022Numerical Modeling of the Blend Morphology Evolution in Twin-Screw Extruderscitations
- 2022Constitutive framework for rheologically complex interfaces with an application to elastoviscoplasticitycitations
- 2021Numerical simulations of the polydisperse droplet size distribution of disperse blends in complex flowcitations
- 2020Numerical analysis of the crystallization kinetics in SLScitations
- 2020On the validity of 2D analysis of non-isothermal sintering in SLScitations
- 2019Simulation of bubble growth during the foaming process and mechanics of the solid foamcitations
- 2018Temperature-dependent sintering of two viscous particlescitations
- 2017Sintering of two viscoelastic particles: a computational approachcitations
- 2016Predicting the fountain flow instability
- 2006On the streamfunction-vorticity formulation in sliding bi-period frames : application to bulk behavior for polymer blendscitations
Places of action
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article
Temperature-dependent sintering of two viscous particles
Abstract
Selective laser sintering (SLS) is a promising additive manufacturing technique, where powder particles are fused together under the influence of a laser beam. To obtain good material properties in the final product, the powder particles need to form a homogeneous melt during the fabrication process. On the one hand, you want to give the particles enough time to fuse, such that the original shape is no longer visible, and interdiffusion of polymers can take place. On the other hand, you want the process to be as fast as possible. This is contradictory, thus choosing the right conditions is not trivial. We developed a computational model based on the finite element method to study the material and process parameters concerning the melt flow of the powder particles. In this work, we restrict ourselves to varying the temperature-dependent viscosity, the process parameters, and the convective heat transfer coefficient of the sintering of two polymer (polyamide 12) particles. The simulations allow for a quantitative analysis of the influence of the different material and processing parameters. From the simulations follows that an optimal sintering process has a low ambient temperature, a narrow beam width with enough power to heat the particles only a few degrees above the melting temperature, and a polymer of which the viscosity decreases significantly within these few degrees.