AccScience Publishing / MSAM / Volume 3 / Issue 4 / DOI: 10.36922/msam.5729
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ORIGINAL RESEARCH ARTICLE

Research on impact resistance of AlSi7Mg uniform and gradient porous structures manufactured by laser powder bed fusion

Mingkang Zhang1 ,  Guijun Bi2 ,  Jie Chen2*
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1 Additive Manufacturing Laboratory, School of Mechanical and Energy Engineering, Guangdong Ocean University, Yangjiang, Guangdong, China
2 Guangdong Key Laboratory of Modern Control Technology, Institute of Intelligent Manufacturing, Guangdong Academy of Sciences, Guangzhou, Guangdong, China
MSAM 2024, 3(4), 5729 https://doi.org/10.36922/msam.5729
Submitted: 30 October 2024 | Accepted: 12 November 2024 | Published: 5 December 2024
© 2024 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ )
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Abstract

Triply periodic minimal surfaces (TPMSs) have the advantage of energy absorption (EA) in automotive, aerospace, and military applications. In this study, uniform and gradient TPMS sandwich structures were prepared by laser powder bed fusion technique, and the effects of cell size and gradient type on the deformation and EA of the structures at different impact velocities were investigated based on drop hammer impact tests. The results indicate that, among the uniform TPMS sandwich structures, the structure with a smaller cell size exhibits higher EA and peak impact force, providing greater impact strength. In contrast, the structure with a larger cell size has a lower peak acceleration, which is suitable for vibration damping. The gradient distribution effectively disperses the impact capacity to obtain a higher impact strength; thus, the sine gradient (G-sineI) structure has the best impact resistance. This work validated the superior EA of gradient TPMS structures and presented a corresponding design method and impact performance evaluation for these structures.

Keywords
Additive manufacturing
Laser power bed fusion
Gradient porous structure
Impact resistance
Funding
The research was jointly sponsored by the funding schemes of GuangdongNaturalScienceFoundation(2023A1515012704), Guangdong Ocean University (360302022201), and ‘Science and Technology Project of Guangdong Academy of Sciences (2022GDASZH-2022010107), and Yangjiang City Key Industry Talent Revitalization Plan Project for Alloy Materials and Hardware Scissors (Grant No. RCZX2023002).
Conflict of interest
The authors declare that they have no competing interests.
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Materials Science in Additive Manufacturing, Electronic ISSN: 2810-9635 Published by AccScience Publishing
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