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FEM-Based Modelling of Elastic Properties and Anisotropic Sinter Shrinkage of Metal EAM

Title data

Rosnitschek, Tobias ; Hüter, Florian ; Alber-Laukant, Bettina:
FEM-Based Modelling of Elastic Properties and Anisotropic Sinter Shrinkage of Metal EAM.
In: International Journal of Simulation Modelling. Vol. 19 (2020) Issue 2 . - pp. 197-208.
ISSN 1726-4529
DOI: https://doi.org/10.2507/IJSIMM19-2-509

Official URL: Volltext

Abstract in another language

The fabrication of nearly fully dense metal parts via additive material extrusion processes is an auspicious alternative to powder-bed-based methods. After the extrusion of the material, the parts are debindered and sintered. Due to the process, the shrinkage of the parts and the material behaviour is orthotropic which causes problems to obtain the desired dimensional accuracy. Classical methods for simulating the sinter process are complex and demand the knowledge of various material parameters that have to be determined experimentally. This paper discusses analytical and numerical methods for predicting the effective properties of additively fabricated parts and presents a new and simple approach for the prediction of shrinkage, warpage and internal stresses caused by the sintering process based on a thermomechanical finite element analysis. The presented framework can be used to model the material behaviour without the need of extensive experimental data and is adaptable to various machines and materials. The proposed approach is exemplary shown. The results validate its functionality to predict sinter induced shrinkage and warpage as well as the locations of maximum internal stresses.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Engineering Design and CAD
Faculties > Faculty of Engineering Science > Chair Engineering Design and CAD > Chair Engineering Design and CAD - Univ.-Prof. Dr.-Ing. Frank Rieg
Faculties
Faculties > Faculty of Engineering Science
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 16 Jun 2020 08:10
Last Modified: 09 Jul 2020 10:43
URI: https://eref.uni-bayreuth.de/id/eprint/55496