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Materials 2019, 12(5), 800; https://doi.org/10.3390/ma12050800

Characterization of the Hot Anode Paste Compaction Process: A Computational and Experimental Study

1
Department of Civil and Water Engineering, NSERC/Alcoa Industrial Research Chair MACE3 and Aluminium Research Centre—REGAL, 1065 avenue de la Medecine, Laval University, Quebec, QC G1V 0A6, Canada
2
ABB Inc., Measurement & Analytics Business Unit, 3400 Rue Pierre-Ardouin, Québec, QC G1P 0B2, Canada
3
Alcoa Primary Metals, Alcoa Technical Center, 859 White Cloud Road, New Kensington, PA 15068, USA
4
Department of Mining, Metallurgical and Materials Engineering, NSERC/Alcoa Industrial Research Chair MACE3 and Aluminium Research Centre—REGAL, 1065 avenue de la Medecine, Laval University, Quebec, QC G1V 0A6, Canada
*
Author to whom correspondence should be addressed.
Received: 21 December 2018 / Revised: 28 February 2019 / Accepted: 4 March 2019 / Published: 8 March 2019

Abstract

The aim of this work is to model and characterize green anode paste compaction behavior. For this purpose, a nonlinear viscoplastic constitutive law for compressible materials, based on the finite strain theory and the thermodynamic framework, was used. An experimental study was carried out to characterize axial and radial behaviors of the anode paste. To this end, simple compaction tests using a thin steel instrumented mold were performed at a temperature of 150 °C. Results of these experiments brought out the nonlinear mechanical behavior of the anode paste. Furthermore, they showed the importance of its radial behavior. The constitutive law was implemented in Abaqus software through the user’s material subroutine VUMAT for explicit dynamic analysis. An inverse analysis procedure for material parameters identification showed that the model predicts compaction tests results with a good agreement. In order to assess the constitutive law predictive potential in situations involving density gradients, compaction tests using complex geometries such as slots and stub holes were carried out. Finite element simulation results showed the ability of the model to successfully predict density profiles measured by the X-ray tomography. View Full-Text
Keywords: green anode paste; compaction test; nonlinear viscoplastic constitutive law; finite element method; X-ray tomography green anode paste; compaction test; nonlinear viscoplastic constitutive law; finite element method; X-ray tomography
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Chaouki, H.; Thibodeau, S.; Fafard, M.; Ziegler, D.; Alamdari, H. Characterization of the Hot Anode Paste Compaction Process: A Computational and Experimental Study. Materials 2019, 12, 800.

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