Crushing and energy absorption properties of additively manufactured concave thin-walled tubes

Abstract

Developing an innovative protective structure with excellent energy absorption performance is a continuous research effort. The emerging additive manufacturing techniques allow fabricating structures with complex geometrical shapes which have the potential to yield unprecedented energy absorption properties. Accordingly, in this paper, the crush and energy absorption behaviour of new designs, namely Concave Tubes (CTs) featuring inwardly curved sidewalls, is assessed experimentally and compared to that of Standard tubes (STs) featuring straight sidewalls. Tubes with different geometrical configurations, including concave circular (CC), concave square (CS), standard circular (SC), and standard square (SS), are fabricated using the Selective Laser Melting (SLM) process from AlSi10Mg aluminium powder and then crushed axially under quasi-static loading. It was found that the tubes have fractured and developed a splitting deformation mode, instead of progressive buckling, during the axial crushing resulting in relatively low energy absorption performance. The experimental results revealed superior energy absorption performance for the CTs over the STs. A Multi-Attribute Decision Making (MADM) technique known as Complex Proportional Assessment (COPRAS) is used to identify the best design. The COPRAS results show that the CC design is the best energy absorbing tube outperforming all other configurations presented in this paper.

Publication DOI: https://doi.org/10.1016/j.rineng.2022.100424
Divisions: College of Engineering & Physical Sciences > School of Engineering and Technology
College of Engineering & Physical Sciences
Funding Information: The authors would like to thank Mr Paul Bates, Mr Neil Basini, and Mr Andrew Gloud for their technical support in the SLM fabrication and mechanical testing. This research was conducted with support from the University of Wolverhampton .
Additional Information: Publisher Copyright: © 2022 The Authors
Uncontrolled Keywords: Additive manufacturing,Axial loading,Concave tubes,Crashworthiness,Energy absorption,Quasi-static,Selective laser melting,Splitting deformation,Thin-walled structures,General Engineering
Publication ISSN: 2590-1230
Last Modified: 27 Dec 2024 08:26
Date Deposited: 17 Jul 2024 11:04
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.sci ... 0949?via%3Dihub (Publisher URL)
PURE Output Type: Article
Published Date: 2022-06-01
Published Online Date: 2022-04-27
Accepted Date: 2022-04-19
Authors: Baroutaji, Ahmad (ORCID Profile 0000-0002-4717-1216)
Arjunan, Arun
Singh, Gurpal
Robinson, John

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