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- W3215384216 abstract "This work provides a novel discrete element method (DEM) framework for modelling the visco-elastic sintering kinetics in virgin and aged polymer powders. The coalescence of particle pairs, over long times, is described by a combined three-stage model of the sintering process, where each stage is dominated by a different driving force: adhesive contact force, adhesive inter-surface force and surface tension. The proposed framework is implemented in MercuryDPM, an open-source package for discrete particle simulations. To quantitatively calibrate the particle-scale parameters, Bayesian filtering is used. Experimental data on Polystyrene (PS), Polyamide 12 (PA12), and PEEK powders, both virgin and aged, are analysed and confirm over a wide range of times the existence of the three distinct sintering mechanisms. In good agreement with the experimental observations, the estimation of sintering time is achieved with a significant accuracy compared to Frenkel's model. This study provides an efficient and reliable approach for future studies of strength evolution in powder-bed fusion processes." @default.
- W3215384216 created "2021-12-06" @default.
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- W3215384216 date "2022-01-01" @default.
- W3215384216 modified "2023-09-27" @default.
- W3215384216 title "Visco-elastic sintering kinetics in virgin and aged polymer powders" @default.
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- W3215384216 doi "https://doi.org/10.1016/j.powtec.2021.11.044" @default.
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