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L. Meng¹, Y. Hou² and W. Han²

¹State IJR Center of Aerospace Design and Additive Manufacturing, Northwestern Polytechnical University, Xi’an, China
²School of Mechanical and Power Engineering, Zhengzhou University, China

L. Meng, Y. Hou, W. Han, "Experimental and Numerical Investigation on the Mechanical Behavior of 3D Star-Shaped Auxetic Structure", in P. Iványi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Eighteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 10, Paper 3.5, 2025,

Keywords: 3D auxetic structure, mechanical properties, quasi-static compression, low-velocity impact, energy absorption, additive manufacturing.

Abstract

This study proposes a novel 3D star-shaped auxetic (3D-SAU) structure, and further investigates the mechanical behavior using experimental and numerical approaches. Three lattice structures have been initially designed and additively-manufactured, namely 3D-SAU, as well as the conventional body-centered-cubic (BCC) and 3D re-entrant (3D-RE) structures. Quasi-static compressive and low-velocity impact (LVI) tests have been performed on those additively-manufactured structures, to characterize the mechanical properties. The experimental and numerical results indicate that 3D-SAU structure possesses a more stable and prolonged stress plateau stage than BCC and 3D-RE structures, demonstrating its superior protective capacity. Moreover, LVI test results reveal that the structures with auxetic effect exhibit lower peak forces and longer impact durations compared to BCC structure. Both auxetic structures are found to possess better energy-absorption capacity during high energy impact cases.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 10 PROCEEDINGS OF THE EIGHTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: P. Iványi, J. Kruis and B.H.V. Topping Paper 3.5 Experimental and Numerical Investigation on the Mechanical Behavior of 3D Star-Shaped Auxetic Structure L. Meng¹, Y. Hou² and W. Han² ¹State IJR Center of Aerospace Design and Additive Manufacturing, Northwestern Polytechnical University, Xi’an, China ²School of Mechanical and Power Engineering, Zhengzhou University, China Full Bibliographic Reference for this paper L. Meng, Y. Hou, W. Han, "Experimental and Numerical Investigation on the Mechanical Behavior of 3D Star-Shaped Auxetic Structure", in P. Iványi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Eighteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 10, Paper 3.5, 2025, Keywords: 3D auxetic structure, mechanical properties, quasi-static compression, low-velocity impact, energy absorption, additive manufacturing. Abstract This study proposes a novel 3D star-shaped auxetic (3D-SAU) structure, and further investigates the mechanical behavior using experimental and numerical approaches. Three lattice structures have been initially designed and additively-manufactured, namely 3D-SAU, as well as the conventional body-centered-cubic (BCC) and 3D re-entrant (3D-RE) structures. Quasi-static compressive and low-velocity impact (LVI) tests have been performed on those additively-manufactured structures, to characterize the mechanical properties. The experimental and numerical results indicate that 3D-SAU structure possesses a more stable and prolonged stress plateau stage than BCC and 3D-RE structures, demonstrating its superior protective capacity. Moreover, LVI test results reveal that the structures with auxetic effect exhibit lower peak forces and longer impact durations compared to BCC structure. Both auxetic structures are found to possess better energy-absorption capacity during high energy impact cases. download the full-text of this paper (PDF, 1673 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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