Combined thermal and particle shape effects on powder spreading in additive manufacturing via discrete element simulations

Roy S, Xiao H, Angelidakis V, Pöschel T (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Book Volume: 445

Article Number: 120099

DOI: 10.1016/j.powtec.2024.120099

Abstract

The thermal and mechanical behaviors of powders are crucial for additive manufacturing. In powder bed fusion, capturing temperature profiles and packing structures before melting is challenging due to diverse heat transfer pathways and powder properties. This study tackles this challenge with a discrete element model simulating non-spherical particles with thermal properties during powder spreading. Thermal conduction and radiation are integrated into a multisphere particle formulation to model heat transfer among irregular-shaped powders with temperature-dependent elastic properties. The model is utilized to simulate the spreading of pre-heated PA12 powder over a hot substrate representing the part under manufacturing. Variances in temperature profiles are observed in the spreading cases based on particle shapes, spreading speed, and temperature-dependent elastic modulus. Particle temperature beneath the spreading blade is influenced by the kinematics of the particle heap and temperature-dependent properties.

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How to cite

APA:

Roy, S., Xiao, H., Angelidakis, V., & Pöschel, T. (2024). Combined thermal and particle shape effects on powder spreading in additive manufacturing via discrete element simulations. Powder Technology, 445. https://doi.org/10.1016/j.powtec.2024.120099

MLA:

Roy, Sudeshna, et al. "Combined thermal and particle shape effects on powder spreading in additive manufacturing via discrete element simulations." Powder Technology 445 (2024).

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