Multiscale characterization and constitutive parameters identification of polyamide (PA12) processed via selective laser sintering

Schneider, J. and Kumar, S. (2020) Multiscale characterization and constitutive parameters identification of polyamide (PA12) processed via selective laser sintering. Polymer Testing, 86, 106357. (doi: 10.1016/j.polymertesting.2020.106357)

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This study is focused on multiscale characterization and constitutive parameters identification of selectively laser sintered PA12 specimens. The process parameters and change in crystallinity due to 3D printing were identified via differential scanning calorimetry (DSC). Tension, compression, shear, flexural and fracture tests performed on samples fabricated, both in 0° and 90° directions reveal that the tensile toughness of samples printed in 0° orientation, outperform samples printed in 90° orientation by an average of 24%. Cryogenically fractured samples were analyzed via SEM and micro-computed tomography to analyze 2D/3D defects and correlate the microstructure with macroscopic properties. The constitutive parameters for a strain-rate and temperature-dependent Three Network (TN) material model were identified using the measured mechanical properties. Furthermore, mechanical response of micro-architected Kelvin lattice structure was analyzed by Finite Element Method employing the TN constitutive model and the predictions were corroborated with measurements.

Item Type:Articles
Additional Information:The authors would like to gratefully acknowledge Abu Dhabi National Oil Company (ANDOC) for the financial support provided under award number: EX2016-000001. This publication is partly based upon work supported by the Khalifa University of Science and Technology under Award No: CIRA-2018-128.
Glasgow Author(s) Enlighten ID:Schneider, Johannes and Kumar, Professor Shanmugam
Creator Roles:
Schneider, J.Data curation, Formal analysis, Investigation, Methodology, Software, Validation, Visualization, Writing – original draft, Writing – review and editing
Shanmugam, K.Investigation, Methodology, Writing – review and editing, Conceptualization, Funding acquisition, Project administration, Resources, Supervision
Authors: Schneider, J., and Kumar, S.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Polymer Testing
ISSN (Online):1873-2348
Published Online:21 January 2020

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