Fracture locus of additively manufactured AlSi10Mg alloy

Logakannan, K. P., Ruan, D., Rengaswamy, J., Kumar, S. and Ramachandran, V. (2023) Fracture locus of additively manufactured AlSi10Mg alloy. Thin-Walled Structures, 184, 110460. (doi: 10.1016/j.tws.2022.110460)

Abstract

In cellular structures, fracture occurs at various locations due to localized complex stress- and/or strain-state. Using the failure strain obtained from a conventional tensile test, the localized failure in cellular materials cannot be adequately predicted through finite element analysis owing to localized triaxial stress-state. Moreover, complex build orientation of different ligaments influences the macroscopic performance of cellular structures considerably. In order to accurately predict the failure of cellular structures using numerical approach, failure strain with respect to both the stress triaxiality and the build orientation ought to be considered. The fracture loci of Laser Powder Bed Fusion (LPBF) fabricated AlSi10Mg alloy were determined experimentally for different build orientations to develop a predictive capability. Moreover, quasi-static compression tests were performed on an additively manufactured re-entrant cellular structures and the experimental results were corroborated by the numerical predictions obtained using fracture loci. The numerical model which considers triaxial fracture locus predicts the deformation mode and the fracture location of the re-entrant structure more accurately than the model that considers a simple uniaxial tensile failure.

• Item Type: Articles
• Additional Information: The authors would also like to acknowledge and appreciate the financial support from Ministry of Education (MoE), India through Scheme for Promotion of Academic and Research Collaboration (SPARC/2018-2019/P988/SL).
• Keywords: Fracture locus, build orientation, cellular structure, Laser Powder Bed Fusion additive manufacturing, AlSi10Mg alloy.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Kumar, Professor Shanmugam

Creator Roles

Kumar, S.: Writing – review and editing

• Authors: Logakannan, K. P., Ruan, D., Rengaswamy, J., Kumar, S., and Ramachandran, V.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Thin-Walled Structures
• Publisher: Elsevier
• ISSN: 0263-8231
• ISSN (Online): 1879-3223
• Published Online: 24 December 2022
• Copyright Holders: Copyright © 2022 Elsevier Ltd.
• First Published: First published in Thin-Walled Structures 184: 110460
• Publisher Policy: Reproduced in accordance with the publisher copyright policy