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Effect of loading rates on the in-plane compressive properties of additively manufactured ABS and PLA-based hexagonal honeycomb structures

Joseph, A and Mahesh, V and Mahesh, V (2021) Effect of loading rates on the in-plane compressive properties of additively manufactured ABS and PLA-based hexagonal honeycomb structures. In: Journal of Thermoplastic Composite Materials, 36 (3).

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Official URL: https://doi.org/10.1177/08927057211051416


Honeycomb structures find numerous applications in automotive, aerospace, sports, and other similar engineering fields. Such incorporation is made possible by the excellent crushing resistance and specific energy absorption capabilities. However, manufacturing such structures through conventional processes is highly laborious and expensive. Such a drawback can be largely mitigated by the adoption of additive manufacturing (AM) processes. Consequently, in this study, hexagonal honeycomb structures are subjected to experimental tests to determine their compressive strength under different loading rates. In addition to this, attempts have also been made to evaluate the effect of different materials and the unit cell dimensions on the compressive properties. The test specimens of different wall thicknesses are manufactured by fused deposition modelling (FDM) using PLA and ABS as the base materials. The samples are then subjected to compressive tests using a standard UTM to quantify the effect of the cell geometrical parameters and the loading rate on the overall compressive nature of the structures. The results show that the compression properties are primarily affected by the loading rate, material properties and the cell-wall thickness of the structures. The initial compressive yield stress and plateau stress generally increase up to a given value of loading rate, after which the strength decline. The cell-wall thickness of the structure influences the threshold loading rate. Therefore, this study provides a preliminary understanding of the compressive properties of AM hexagonal honeycomb structures to analyse the prospects for application in real-world engineering applications. It is proposed that such structures find profound applications in structural components of aerospace equipment, automotive parts, sports gear, and other similar areas of interest where high strength and energy absorption are of predominant importance. © The Author(s) 2021.

Item Type: Journal Article
Publication: Journal of Thermoplastic Composite Materials
Publisher: SAGE Publications Ltd
Additional Information: The copyright for this article belongs to SAGE Publications Ltd.
Keywords: Additives; Cells; Compressive strength; Cytology; Energy absorption; Geometry; Honeycomb structures; Sports; Stress analysis; Structural properties; Yield stress, Automotives; Cell geometries; Cell-wall thickness; Compressive properties; Crushing resistance; Engineering fields; Hexagonal honeycomb; Hexagonal honeycomb structure; Loading rate; Specific energy absorption, 3D printers
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 24 Feb 2023 05:01
Last Modified: 24 Feb 2023 05:01
URI: https://eprints.iisc.ac.in/id/eprint/80454

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