Dynamic crushing responses of bio-inspired re-entrant auxetic honeycombs under in-plane impact loading

Zhang, Xinchun; An, Chao-chao; Shen, Zhen-feng; Wu, Hexiang; Yang, Wengang; Bai, Jiang-pan

doi:10.1016/j.mtcomm.2020.100918

Cited by 92 publications

(24 citation statements)

References 40 publications

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“…Such materials have gained considerable interest from the scientific community over the last decade thanks to their potential applications as stents [2], orthopedic bone plates [3] or skin grafts [4] in medicine, as energy absorbers in sports [5] or crashworthiness situations [6,7], as high sensitivity sensors [8,9], or as highly tunable molecular sieves [10]. The archetype of the auxetic structure is the re-entrant honeycomb network, thanks to its peculiarly designed porosity [6,[11][12][13]. Most of the known auxetic materials are artificially designed metamaterials [14] or composites which can be patterned through 3d printing or weaving [3,[15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Non-auxetic/auxetic transitions inducing modifications of the magnetic anisotropy in CoFe2O4 thin films

Martin

Roulland

Grenier

et al. 2020

Journal of Alloys and Compounds

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An auxetic behaviour is evidenced in CoFe2O4 thin films grown by pulsed laser deposition on (100) MgO substrates under various O2/N2 pressures. This rare behaviour for an intrinsic material is observed for intermediate oxidation conditions, in between two non auxetic domains delimited by high (>0.05 mbar) and low (<0.03 mbar) O2/N2 deposition pressures. Combining X-ray resonant diffraction and Mössbauer spectroscopy, we experimentally prove that the auxetic behaviour is related to the presence of cobalt ions in the tetrahedral sites. The impact of the structural modifications caused by the various oxidation conditions on the electronic and magnetic properties are studied for the various oxidation domains. Variations as important as a transition from a p-type semiconducting to an insulating behaviour, or from an in-plane to an out-of-plane magnetization are observed when spanning from the lowest (0.01 mbar) to the highest (1 mbar) studied oxidation pressures.

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Section: Introductionmentioning

confidence: 99%

Non-auxetic/auxetic transitions inducing modifications of the magnetic anisotropy in CoFe2O4 thin films

Martin

Roulland

Grenier

et al. 2020

Journal of Alloys and Compounds

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“…[1][2][3] Naturally, auxetic materials have become a popular talking point due to their lightweight and high energy absorption properties. [4][5][6][7] Zhang et al 8 proposed a re-entrant arc-shaped structure design to improve energy absorption and the uniformity of a crushing load. Wang et al 9 designed a jounce bumper with NPR characteristics and proved that it was beneficial to the performance of noise, vibration, and harshness under similar mechanical behaviors when compared with conventional structures.…”

Section: Introductionmentioning

confidence: 99%

Topology design and equivalent mechanical properties of a three-dimensional star-shaped auxetic structure

Wang

Dai

Zhao

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Topology design is the most important method of obtaining optimal material distribution that is directly related to the mechanical properties of structural materials. Aimed at improving the accuracy and efficiency of topology design, this paper explores an innovative topological technique that integrates a sigmoid-rational approximation of material properties approach, with a modified optimality criteria algorithm. Furthermore, a three-dimensional (3D) star-shaped auxetic structure, based on the sigmoid-rational approximation of material properties approach and a modified optimality criteria technique is proposed. The unit cell structural parameters are extracted, and the mechanical properties of the 3D star-shaped structure, including the relative density, equivalent elastic modulus, and equivalent Poisson's ratio, are investigated using mechanical derivation, numerical, and experimental methods. The subsequent results demonstrate that the sigmoid-rational approximation of material properties approach and a modified optimality criteria technique provides a feasible novel idea for multicellular structure development and that the advantageous 3D star-shaped auxetic structure has great potential within the field of structural safety.

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“…The designability of the auxetic honeycomb allows for directional design. Various forms are possible such as the reentrant honeycomb [ 15 ], arrowheads [ 16 ], chirals, and more complex bio-inspired forms [ 17 ]. The auxetic honeycomb structure has been designed and applied to sensors [ 18 ], energy-absorbing structures, anti-explosion structures [ 19 ], flexible electronics [ 20 ], and many other fields, due to its excellent shear strength, enhanced fracture toughness, and obvious indentation resistance [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

An Innovative Auxetic Honeycomb Sandwich Tube: Fabrication and Mechanical Properties

Jian-qin

Zhou²,

Kong³

et al. 2022

Polymers

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In this study, based on the free-rolling mechanism of the auxetic honeycomb, a honeycomb cylindrical shell was successfully prepared to overcome the fracture problem of the hexagonal honeycomb during rolling. Auxetic honeycomb sandwich tubes (AHSTs) with a variable Poisson’s ratio were fabricated by molding and bonding. A Poisson’s ratio model of the auxetic honeycomb core was developed based on the strain increment ratio of the deformed honeycomb and validated using computed tomography (CT). Four failure modes (progressive stable fold mode I, unstable local buckling mode II, transverse shearing mode III, and mid-length collapse mode IV) of the AHST were summarized by comparing the deformation behavior and force–displacement curves with different geometric parameters. When the aspect ratio R is greater than 3, the AHST will be more easily damaged in instability (Mode IV). Static compression tests showed that the peak force (PF) and crushing force efficiency (CFE) of the AHST were higher than those of the CFRP thin-walled tube of the same diameter by 78% and 115%, respectively. Therefore, the AHST has excellent mechanical properties and it is feasible to use the auxetic honeycomb as a core for sandwich structures.

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Dynamic crushing responses of bio-inspired re-entrant auxetic honeycombs under in-plane impact loading

Cited by 92 publications

References 40 publications

Non-auxetic/auxetic transitions inducing modifications of the magnetic anisotropy in CoFe2O4 thin films

Non-auxetic/auxetic transitions inducing modifications of the magnetic anisotropy in CoFe2O4 thin films

Topology design and equivalent mechanical properties of a three-dimensional star-shaped auxetic structure

An Innovative Auxetic Honeycomb Sandwich Tube: Fabrication and Mechanical Properties

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