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3D-multilayer simulation of microstructure and mechanical properties of porous materials by selective sintering

Zhou, Xiandong ; Yang, Yangyiwei ; Bharech, Somnath ; Lin, Binbin ; Schröder, Jörg ; Xu, Bai-Xiang (2021)
3D-multilayer simulation of microstructure and mechanical properties of porous materials by selective sintering.
In: GAMM-Mitteilungen, 44 (4)
doi: 10.1002/gamm.202100017
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

This work presents multilayer phase-field simulation of selective sintering process and the calculation of effective mechanical properties and residual stress of the microstructure using the finite element method. The dependence of the effective properties and residual stress on the process parameters, such as beam power and scan speed, are analyzed. Significant partial melting of powders is observed for large beam power and low scan speed, which results in low porosity of the microstructure. Nonlinear relationship between the effective mechanical properties and process parameters is observed. The increasing rate of effective mechanical properties decreases with increasing beam power, while increases with decreasing scan speed. The dependence of effective Young's modulus and Poisson's ratio on porosity are well established using power law models. Stress concentrations are found at the necking region of powders and the intensity increases with the level of partial melting, which results in increasing residual stress in the microstructure. The numerical results reveal quantitatively the process-microstructure-property relation, which implies the feasibility of the subsequent data-driven approach.

Typ des Eintrags: Artikel
Erschienen: 2021
Autor(en): Zhou, Xiandong ; Yang, Yangyiwei ; Bharech, Somnath ; Lin, Binbin ; Schröder, Jörg ; Xu, Bai-Xiang
Art des Eintrags: Bibliographie
Titel: 3D-multilayer simulation of microstructure and mechanical properties of porous materials by selective sintering
Sprache: Englisch
Publikationsjahr: 19 Oktober 2021
Verlag: Wiley-VCH
Titel der Zeitschrift, Zeitung oder Schriftenreihe: GAMM-Mitteilungen
Jahrgang/Volume einer Zeitschrift: 44
(Heft-)Nummer: 4
DOI: 10.1002/gamm.202100017
Kurzbeschreibung (Abstract):

This work presents multilayer phase-field simulation of selective sintering process and the calculation of effective mechanical properties and residual stress of the microstructure using the finite element method. The dependence of the effective properties and residual stress on the process parameters, such as beam power and scan speed, are analyzed. Significant partial melting of powders is observed for large beam power and low scan speed, which results in low porosity of the microstructure. Nonlinear relationship between the effective mechanical properties and process parameters is observed. The increasing rate of effective mechanical properties decreases with increasing beam power, while increases with decreasing scan speed. The dependence of effective Young's modulus and Poisson's ratio on porosity are well established using power law models. Stress concentrations are found at the necking region of powders and the intensity increases with the level of partial melting, which results in increasing residual stress in the microstructure. The numerical results reveal quantitatively the process-microstructure-property relation, which implies the feasibility of the subsequent data-driven approach.

ID-Nummer: Artikel-ID: e202100017
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Mechanik Funktionaler Materialien
DFG-Sonderforschungsbereiche (inkl. Transregio)
DFG-Sonderforschungsbereiche (inkl. Transregio) > Transregios
DFG-Sonderforschungsbereiche (inkl. Transregio) > Transregios > CRC/TRR 270 HoMMage
Zentrale Einrichtungen
Zentrale Einrichtungen > Hochschulrechenzentrum (HRZ)
Zentrale Einrichtungen > Hochschulrechenzentrum (HRZ) > Hochleistungsrechner
TU-Projekte: DFG|GRK 2561|TP_4_Xu_GRK_2561
Hinterlegungsdatum: 01 Nov 2021 13:13
Letzte Änderung: 22 Jul 2024 12:43
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