Tailoring 3D star-shaped auxetic structures for enhanced mechanical performance

Journal article

Hassanin, H., Wang, Y., A. Alsaleh, N., Djuansjah, J., El-Sayed, K. and Essa, K. 2024. Tailoring 3D star-shaped auxetic structures for enhanced mechanical performance. Aerospace. 11 (6), p. 428. https://doi.org/10.3390/aerospace11060428
AuthorsHassanin, H., Wang, Y., A. Alsaleh, N., Djuansjah, J., El-Sayed, K. and Essa, K.
Abstract

Auxetic lattice structures are three-dimensionally designed intricately repeating units with multifunctionality in three-dimensional space, especially with the emergence of additive manufacturing (AM) technologies. In aerospace applications, these structures have potential for use in high-performance lightweight components, contributing to enhanced efficiency. This paper investigates the design, numerical simulation, manufacturing, and testing of three-dimensional (3D) star-shaped lattice structures with tailored mechanical properties. Finite element analysis (FEA) was employed to examine the effect of a lattice unit’s vertex angle and strut diameter on the lattice structure’s Poisson’s ratio and effective elastic modulus. The strut diameter was altered from 0.2 to 1 mm, while the star-shaped vertex angle was adjusted from 15 to 90 degrees. Laser powder bed fusion (LPBF), an AM technique, was employed to experimentally fabricate 3D star-shaped honeycomb structures made of Ti6Al4V alloy, which were then subjected to compression testing to verify the modelling results. The effective elastic modulus was shown to decrease when increasing the vertex angle or decreasing the strut diameter, while the Poisson’s ratio had a complex behaviour depending on the geometrical characteristics of the structure. By tailoring the unit vertex angle and strut diameter, the printed structures exhibited negative, zero, and positive Poisson’s ratios, making them applicable across a wide range of aerospace components such as impact absorption systems, aircraft wings, fuselage sections, landing gear, and engine mounts. This optimization will support the growing demand for lightweight structures across the aerospace sector.

KeywordsStar-shaped lattice structure; Auxetic structures; Laser powder bed fusion; Poisson’s ratio
Year2024
JournalAerospace
Journal citation11 (6), p. 428
PublisherMDPI
ISSN2226-4310
Digital Object Identifier (DOI)https://doi.org/10.3390/aerospace11060428
Official URLhttps://www.mdpi.com/2226-4310/11/6/428
Publication dates
Online24 May 2024
Publication process dates
Accepted22 May 2024
Deposited05 Jun 2024
Publisher's version
License
File Access Level
Open
Output statusPublished
References

1. Lim, T.-C. Mechanics of Metamaterials with Negative Parameters; Springer Nature: Berlin/Heidelberg, Germany, 2020
2. Lakes, R.S. Negative-Poisson’s-Ratio Materials: Auxetic Solids. Annu. Rev. Mater. Res. 2017, 47, 63–81.
3. Grima, J.N.; Evans, K.E. Auxetic behavior from rotating squares. J. Mater. Sci. Lett. 2000, 19, 1563–1565.
4. Karathanasopoulos; Rodopoulos, D.C. Enhanced Cellular Materials through Multiscale, Variable-Section Inner Designs: Mechanical Attributes and Neural Network Modeling. Materials 2022, 15, 3581. https://doi.org/10.3390/ma15103581.
5. Rafsanjani, A. and D. Pasini, Bistable auxetic mechanical metamaterials inspired by ancient geometric motifs. Extrem. Mech. Lett. 2016, 9, 291–296.
6. El-Sayed, M.A.; Essa, K.; Ghazy, M.; Hassanin, H. Design optimization of additively manufactured titanium lattice structures for biomedical implants. Int. J. Adv. Manuf. Technol. 2020, 110, 2257–2268.
7. Ghavidelnia; Bodaghi, M.; Hedayati, R. Idealized 3D Auxetic Mechanical Metamaterial: An Analytical, Numerical, and Experimental Study. Materials 2021, 14, 993. https://doi.org/10.3390/ma14040993.
8. Hassanin; Abena, A.; Elsayed, M.A.; Essa, K. 4D printing of NiTi auxetic structure with improved ballistic performance. Micromachines 2020, 11, 745.
9. Rogers, G.J.; Milthorpe, B.K.; Muratore, A.; Schindhelm, K. Measurement of the mechanical properties of the ovine anterior cruciate ligament bone-ligament-bone complex: A basis for prosthetic evaluation. Biomaterials 1990, 11, 89–96.
10. Shirzad; Zolfagharian, A.; Bodaghi, M.; Nam, S.Y. Auxetic metamaterials for bone-implanted medical devices: Recent advances and new perspectives. Eur. J. Mech. A Solids 2023, 98, 104905.
11. Kim; Son, K.H.; Lee, J.W. Auxetic Structures for Tissue Engineering Scaffolds and Biomedical Devices. Materials 2021, 14, 6821.
12. Abd-Elaziem, W.; Elkatatny, S.; Abd-Elaziem, A.-E.; Khedr, M.; El-baky, M.A.A.; Hassan, M.A.; Abu-Okail, M.; Mohammed, M.; Järvenpää, A.; Allam, T. On the current research progress of metallic materials fabricated by laser powder bed fusion process: A review. J. Mater. Res. Technol. 2022, 20, 681–707.
13. Khorasani; Gibson, I.; Ghasemi, A.H.; Hadavi, E.; Rolfe, B. Laser subtractive and laser powder bed fusion of metals: Review of process and production features. Rapid Prototyp. J. 2023, 29, 935–958.
14. Essa; Sabouri, A.; Butt, H.; Basuny, F.H.; Ghazy, M.; El-Sayed, M.A. Laser additive manufacturing of 3D meshes for optical applications. PLoS ONE 2018, 13, e0192389.
15. Bittredge, O.H.H.; El-Sayed, M.A.; Eldessouky, H.M.; Alsaleh, N.A.; Alrasheedi, N.H.; Essa, K.; Ahmadein, M. Fabrication and Optimisation of Ti-6Al-4V Lattice-Structured Total Shoulder Implants Using Laser Additive Manufacturing. Materials 2022, 15, 3095.
16. Maconachie; Leary, M.; Lozanovski, B.; Zhang, X.; Qian, M.; Faruque, O.; Brandt, M. SLM lattice structures: Properties, performance, applications and challenges. Mater. Des. 2019, 183, 108137.
17. Zhang, X.Z.; Leary, M.; Tang, H.P.; Song, T.; Qian, M. Selective electron beam manufactured Ti-6Al-4V lattice structures for orthopedic implant applications: Current status and outstanding challenges. Curr. Opin. Solid State Mater. Sci. 2018, 22, 75–99.
18. Zadeh, N.; Dayyani, I.; Yasaee, M. Fish Cells, a new zero Poisson’s ratio metamaterial—Part I: Design and experiment. J. Intell. Mater. Syst. Struct. 2020, 31, 1617–1637.
19. Gong; Ren, C.; Sun, J.; Zhang, P.; Du, L.; Xie, F. 3D Zero Poisson’s Ratio Honeycomb Structure for Morphing Wing Applications. Biomimetics 2022, 7, 198. https://doi.org/10.3390/biomimetics7040198.
20. Baertsch; Ameli, A.; Mayer, T. Finite-Element Modeling and Optimization of 3D-Printed Auxetic Reentrant Structures with Stiffness Gradient under Low-Velocity Impact. J. Eng. Mech. 2021, 147, 04021036.
21. Yang; Harrysson, O.; West, H.; Cormier, D. Mechanical properties of 3D re-entrant honeycomb auxetic structures realized via additive manufacturing. Int. J. Solids Struct. 2015, 69, 475–490.
22. Rad, S.; Ahmad, Z.; Alias, A. Computational approach in formulating mechanical characteristics of 3D star honeycomb auxetic structure. Adv. Mater. Sci. Eng. 2015, 2015, 650769.
23. Strek; Matuszewska, A.; Jopek, H. Finite Element Analysis of the Influence of the Covering Auxetic Layer of Plate on the Contact Pressure. Phys. Status Solidi B 2017, 254, 1700103.
24. Mrozek; Strek, T. Numerical Analysis of Dynamic Properties of an Auxetic Structure with Rotating Squares with Holes. Materials 2022, 15, 8712. https://doi.org/10.3390/ma15248712.
25. Bilski; Pigłowski, P.M.; Wojciechowski, K.W. Extreme Poisson’s Ratios of Honeycomb, Re-Entrant, and Zig-Zag Crystals of Binary Hard Discs. Symmetry 2021, 13, 1127. https://doi.org/10.3390/sym13071127.
26. Bartolomeu; Gasik, M.; Silva, F.S.; Miranda, G. Mechanical Properties of Ti6Al4V Fabricated by Laser Powder Bed Fusion: A Review Focused on the Processing and Microstructural Parameters Influence on the Final Properties. Metals 2022, 12, 986. https://doi.org/10.3390/met12060986.
27. Cuadrado; Yánez, A.; Martel, O.; Deviaene, S.; Monopoli, D. Influence of load orientation and of types of loads on the mechanical properties of porous Ti6Al4V biomaterials. Mater. Des. 2017, 135, 309–318.
28. Lee, Y.T.; Peters, M.; Welsch, G. Elastic moduli and tensile and physical properties of heat-treated and quenched powder metallurgical Ti-6Al-4V alloy. Metall. Trans. A 1991, 22, 709–714.
29. Li, S.; Sitnikova, E., Eds. Chapter 1—Introduction—Background, Objectives and Basic Concepts. In Representative Volume Elements and Unit Cells; Woodhead Publishing: Sawston, UK, 2020; pp. 3–10.
30. Farashi; Vafaee, F. Effect of printing parameters on the tensile strength of FDM 3D samples: A meta-analysis focusing on layer thickness and sample orientation. Prog. Addit. Manuf. 2022, 7, 565–582.

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