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L. Meng, M. Zhong, "Shedding light on the impact-resisting mechanism of tension-torsion coupling metamaterials", in P. Iványi, J. Logo, B.H.V. Topping, (Editors), "Proceedings of the Sixth International Conference on Soft Computing, Machine Learning and Optimisation in Civil, Structural and Environmental Engineering", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 5, Paper 5.1, 2023, doi:10.4203/ccc.5.5.1

Keywords: TTC metamaterial, energy absorbing, impact-resisting, additive manufacturing.

Abstract

Tension-torsion coupling (TTC) metamaterials are man-made architectures demonstrating a counterintuitively rotational deformation under unidirectional load. Since their emergence in 2017, numerous studies have been carried out to verify the unique static properties originating from the twisting effect of TTC metamaterials. From the perspective of dynamic properties, even though the distinct advantage in impact resisting has been experimentally observed, the underlying mechanism remains unrevealed, and related investigations are conspicuously scarce. Herein, firstprinciple simulations are performed to provide a quantitative analysis of energy flow during the impact procedure and to shed light on the mechanism of energy damping and impact resistance. We demonstrate that the twisting effect of cellular material generally leads to weakened stiffness, and this is advantageous particularly for the improvement of impact mitigation. Also, we reveal that the unique chiral features of TTC metamaterials allow more strain energy to be stored during the impact, and this portion of the energy is ultimately dissipated by after-impact vibration. Lastly, energy dissipation by friction between lateral struts or ligaments, despite occupying a less significant position, is proven to be comprehensively enhanced in TTC metamaterials.

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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: 5 PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE ON SOFT COMPUTING, MACHINE LEARNING AND OPTIMISATION IN CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING Edited by: P. Iványi, J. Logo and B.H.V. Topping Paper 5.1 Shedding light on the impact-resisting mechanism of tension-torsion coupling metamaterials L. Meng and M. Zhong School of Mechanical Engineering, Northwestern Polytechnical University, China doi:10.4203/ccc.5.5.1 Full Bibliographic Reference for this paper L. Meng, M. Zhong, "Shedding light on the impact-resisting mechanism of tension-torsion coupling metamaterials", in P. Iványi, J. Logo, B.H.V. Topping, (Editors), "Proceedings of the Sixth International Conference on Soft Computing, Machine Learning and Optimisation in Civil, Structural and Environmental Engineering", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 5, Paper 5.1, 2023, doi:10.4203/ccc.5.5.1 Keywords: TTC metamaterial, energy absorbing, impact-resisting, additive manufacturing. Abstract Tension-torsion coupling (TTC) metamaterials are man-made architectures demonstrating a counterintuitively rotational deformation under unidirectional load. Since their emergence in 2017, numerous studies have been carried out to verify the unique static properties originating from the twisting effect of TTC metamaterials. From the perspective of dynamic properties, even though the distinct advantage in impact resisting has been experimentally observed, the underlying mechanism remains unrevealed, and related investigations are conspicuously scarce. Herein, firstprinciple simulations are performed to provide a quantitative analysis of energy flow during the impact procedure and to shed light on the mechanism of energy damping and impact resistance. We demonstrate that the twisting effect of cellular material generally leads to weakened stiffness, and this is advantageous particularly for the improvement of impact mitigation. Also, we reveal that the unique chiral features of TTC metamaterials allow more strain energy to be stored during the impact, and this portion of the energy is ultimately dissipated by after-impact vibration. Lastly, energy dissipation by friction between lateral struts or ligaments, despite occupying a less significant position, is proven to be comprehensively enhanced in TTC metamaterials. download the full-text of this paper (PDF, 11 pages, 649 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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