Quasi-static compression and dynamic crushing behaviors of novel hybrid re-entrant auxetic metamaterials with enhanced energy-absorption

Zhang, Xiaolong; Hao, Huanan; Tian, Ruilan; Xue, Quan; Guan, Huaitong; Yang, Xinwei

doi:10.1016/j.compstruct.2022.115399

Cited by 122 publications

(27 citation statements)

References 52 publications

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“…It should be noted that this effect is not caused by the structural densification, but by the change of deformation mode of the substructure. In similar studies, this mechanism, i.e., using the change of structural deformation mode to improve the crushing strength, is not rare [24,57,68]. However, a considerable part of those structures has a second stress plateau, which is accompanied by a significant stress peak.…”

Section: Discussionmentioning

confidence: 97%

“…The lower plate is fixed, and the upper plate moves at a uniform speed. A surface-to-surface contact algorithm with a friction coefficient of 0.2 [68] is employed to describe the contact between the specimen and the plates. For the case loading along the x-direction, the simulation is performed with similar conditions, where the specimen is with twelve cells in y-direction and five cells in x-direction, as shown in figure 3(d).…”

Section: Finite Element Modelsmentioning

confidence: 99%

“…Therefore, the evaluation of crushing responses for the novel cell, including its strength and the deformation modes, has gotten more and more attention from scholars [23,27,29,30]. While the majority of the relevant studies are carried out numerically, analytical models and experimental analyses have also been effectively explored, in which the additive manufacturing (AM) technology provides a powerful tool for the rapid verification of novel honeycomb concepts [23,28,68].…”

Section: Introductionmentioning

confidence: 99%

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Mechanical behaviors of a novel auxetic honeycomb characterized by re-entrant combined-wall hierarchical substructures

Zhou

Pan

Chen

et al. 2022

Mater. Res. Express

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The current focus of the metamaterials is to further improve their performance by the unit cell innovation, while for the auxetic metamaterials, the compromise between the mechanical properties and auxetic effect still needs more efforts. Given this issue, here we developed a novel auxetic honeycomb, named re-entrant combined-wall (RCW) honeycomb, by introducing four hierarchical substructures to the RE cell. Analytical expressions were derived and used to study the in-plane elastic constants of the RCW honeycomb, which were well confirmed by the established finite element model. Further, we investigated its crushing behaviors under large deformation by the explicit numerical method, and the quasi-static crushing experiments were also carried out by the 3D-printed specimens. Results show that the properties of the proposed RCW honeycomb have a high degree of orthogonality and tunability. Compared with the traditional RE honeycomb, the Young’s modulus of the RCW honeycomb in the y direction increases by more than 120%, and the Poisson’s ratio decreases by about 43%. Besides, behaviors of the cell wall contact induced by the adding substructure can lead to an interesting stress enhancement phenomenon under large deformation, which significantly increases its crushing strength, up to 140%, compared with the RE honeycomb. Therefore, the results in this work effectively demonstrate the improved mechanical properties and auxetic performance of the proposed RCW honeycomb. Besides, the adopted design strategy of hierarchical substructure also exhibits great potential for developing novel and excellent auxetic mechanical metamaterials.

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Section: Discussionmentioning

confidence: 97%

Section: Finite Element Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical behaviors of a novel auxetic honeycomb characterized by re-entrant combined-wall hierarchical substructures

Zhou

Pan

Chen

et al. 2022

Mater. Res. Express

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“…Let H be the monocyte height in Figure 2(b), let the rod width be T, and let the combined angle be θ-φ. Refer to previous literature [41]; the selected parameters are presented in Table 1.…”

Section: Physical Design a Double-arrow Negativementioning

confidence: 99%

“…e results showed that these composite structures can meet the requirements of light weight, high energy absorption, and low impact effect. Zhang et al [41,42] proposed a vertical strut and hexagon combined structure and investigated the quasistatic compression and dynamic crushing behaviors of it through simulation and theoretical analysis; the results indicate that the VSHCS has a better energy-absorption capacity than other reentrant structures. Researchers have done plenty of experiments compared with theoretical analysis and simulations on 2D auxetic structures, but there is less relevant research on 3D auxetic structures; it is necessary to study the mechanical properties for better application.…”

Section: Introductionmentioning

confidence: 99%

Properties of 3D Double-Arrow Negative Poisson’s Ratio Lattice Structure under Quasi-Static Compression and Low-Speed Impact

Sun

Wang³

et al. 2022

Advances in Materials Science and Engineering

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Structures with negative Poisson’s ratios have wide applications in automotive design, owing to their excellent mechanical properties and good energy absorption capability. This type of structure can be used to design lightweight components. We used a double-arrow negative Poisson ratio structure and embedded lock assembly process to design a 3D lattice structure with a negative Poisson ratio. Moreover, we selected different design parameters for a simulation analysis and experimental research. The performances of the lattice structures with different parameters were compared and analyzed under different test conditions, including out-of-plane compression, three-point bending, and low-speed impact. The findings reported here pave the way for the development of new 3D auxetic materials with significantly expanded design space and potential applications by reducing the difficulty of the manufacturing process.

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Instrumented Dynamic Penetration of Sandwich Panels with Auxetic and Non‐Auxetic Core using Direct Impact Hopkinson Bar

Šleichrt,

Falta,

Neuhäuserová

et al. 2023

Adv Eng Mater

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The paper deals with the dynamic penetration of 3D printed panels with auxetic and conventional honeycomb unit cell‐based cores. The geometry of the unit cells and their periodic assembly in the resulting lattices were selected to ensure the same relative density and overall weight of the individual sample types. Such a similarity of both specimen types allowed the evaluation of differences between conventional and auxetic lattices in terms of penetration characteristics and deformation energy mitigation properties. Dynamic penetration of the samples was performed using a fully strain‐gauge instrumented Open Hopkinson Pressure Bar (OHPB) at three impact velocities resulting in three loading scenarios. All performed experiments were captured by two optical cameras for detailed observation and for tracking of an impactor movement using Digital Image Correlation (DIC). The force‐penetration depth relation was used to evaluate the elastic and post‐yield compression characteristics of the lattices together with their deformation energy mitigation capabilities. The results show that the main differences in the deformation response of lattices consist of lower overall stiffness and effective yielding of the auxetic lattices at higher penetration depth. Numerical simulation using an explicit solver was performed to analyze the deformation mechanism of the individual core types.This article is protected by copyright. All rights reserved.

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Quasi-static compression and dynamic crushing behaviors of novel hybrid re-entrant auxetic metamaterials with enhanced energy-absorption

Cited by 122 publications

References 52 publications

Mechanical behaviors of a novel auxetic honeycomb characterized by re-entrant combined-wall hierarchical substructures

Mechanical behaviors of a novel auxetic honeycomb characterized by re-entrant combined-wall hierarchical substructures

Properties of 3D Double-Arrow Negative Poisson’s Ratio Lattice Structure under Quasi-Static Compression and Low-Speed Impact

Instrumented Dynamic Penetration of Sandwich Panels with Auxetic and Non‐Auxetic Core using Direct Impact Hopkinson Bar

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