Dynamic Crushing of Gradient Auxetic Honeycombs

Zhang, Junhua; Dong, Baojuan; Zhang, Wei

doi:10.1007/s42417-020-00236-z

Cited by 18 publications

(4 citation statements)

References 21 publications

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“…Moreover, the content of ceramic along the positive direction of y axis is gradually reduced. The content of ceramic is expressed by the following volume fraction [11]:…”

Section: Functional Gradient Auxeticmentioning

confidence: 99%

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Free Vibration and Bending of Gradient Auxetic Plate Using Finite Element Method

Cong,

Tung,

Hai

et al. 2021

MaP

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In recent years, there has been a new approach to the material industry that uses sandwich structures with auxetic honeycomb cores with the interesting property of negative Poisson's ratios. In this paper, the Finite Element Method (in ANSYS) is used to investigate natural frequency of vibration and bending characteristics under varying pressure loads applied on the top skin when changing fundamental properties of some gradient configurations, including angular gradient, thickness gradient and functional gradient configurations of the auxetic plate with honeycomb structure. Thereby, the advantages of each configuration are investigated, studied, and obtained; therefore, it is expected to be applied in various industry sectors, such as wind turbine blades, aircraft wings, among others.

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“…Moreover, the content of ceramic along the positive direction of y axis is gradually reduced. The content of ceramic is expressed by the following volume fraction [11]:…”

Section: Functional Gradient Auxeticmentioning

confidence: 99%

“…Zhang Th al. [11] used the finite element method and experiment to research the dynamic crushing of gradient auxetic honeycombs. In the same year, Cong Th al.…”

Section: Introductionmentioning

confidence: 99%

Free Vibration and Bending of Gradient Auxetic Plate Using Finite Element Method

Cong,

Tung,

Hai

et al. 2021

MaP

View full text Add to dashboard Cite

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“…[1][2][3][4] They are widely used in various industries, including architecture, aviation, and packing due to the characteristics of high crushing stress, almost constant crushing force, and relative insensitivity to the overall loss of stability. Up to now, the regular hexagonal honeycomb is the most extensively used commercial products although other improved honeycomb structures can also be fabricated by various methods such as the hierarchical honeycombs, 5,6 graded honeycombs, 7,8 disordered honeycombs, 9,10 hybrid honeycombs, 11,12 curved ligament structures, [13][14][15] reinforced strut honeycombs, 16,17 and honeycomb filled with foam. [18][19][20] The out-of-plane crushing resistance of honeycomb structures attracts the attention of many researchers.…”

Section: Introductionmentioning

confidence: 99%

“…[18][19][20] The out-of-plane crushing resistance of honeycomb structures attracts the attention of many researchers. However, most of the researches are focused on the experimental and numerical study of the out-of-plane crushing resistance of honeycombs [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] and there is little theoretical work being published in the open literature to study the crushing resistance of improved honeycombs. This is due to the complex nonlinear features and difficulties in energy dissipation analyses during the post-buckling and large plastic deformation behavior of honeycombs under axial loading.…”

Section: Introductionmentioning

confidence: 99%

Quasi-static axial crushing of honeycomb paperboard filled with foam particles

Guan

Wang

Pan

et al. 2022

Journal of Reinforced Plastics and Composites

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In this paper a honeycomb paperboard filled with foam particles is presented. The effect of parameters such as the cell size, the honeycomb paperboard thickness and the foam particles size on the interaction, energy absorption capacity, and the half wavelength are investigated theoretically and experimentally. The experiment results show that foam particles of honeycomb paperboard increase their initial crushing strength and energy absorption and the stress in the honeycomb paperboard filled with foam particles rises exponentially during the crushing stage. Furthermore, decrease in the densification strain; increase in number of folds; and decrease in half wavelength are other results of this research. And the smaller the foam particles, the greater the effect of foam particles filling. In the theoretical section, the interaction between the foam particles and the honeycomb paperboard cell wall are studied by regarding as point contact. Expressions are derived to predict the stress and half wavelength of honeycomb paperboard filled with foam ```````````````````particles in the crushing stage. A comparison between theoretical predictions and experimental results shows that the theoretical models can effectively predict this stress. It is expected that these studies can help to improve the application of honeycomb paperboard and provide a reference for further research on foam particle filling.

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3D Printing Auxetic Architectures for Hypertrophic Scar Therapy

Chow

Yick

Wong³

et al. 2022

Macro Materials & Eng

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Fitting the human body for different purposes such as flexible electronics and functional garments can be a challenging task. Pressure garments are used to treat hypertrophic scars (HSs)pr. However, they have often failed to provide consistent pressure during joint movement. To increase the therapy efficacy, the application is proposed of 3D printed thermoplastic polyurethane (TPU) with an auxetic architecture insert for pressure therapy. Auxetic material can undergo an out‐of‐plane bending into a synclastic curvature, which can easily accommodate the contours of the human body. In this study, the synclastic effect of the auxetic structure under out‐of‐plane bending is illustrated through finite element analysis (FEA) first. Next, the formability, structural deformation, and auxetic response of re‐entrant (RE) and double‐arrowhead (DAH) auxetic structures when loading by a spherical surface in out‐of‐plane direction are unprecedentedly evaluated experimentally and numerically. It can be observed the internal angle of auxetic structure plays an important role regarding shape formability. Nevertheless, the result of wear trial reveals this design facilitates a stable level of pressure during the body motion which promotes the recovery of HS. It is believed the characterized result of auxetic architectures not only contribute to HS therapy, but also any type of biomedical devices.

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Dynamic Crushing of Gradient Auxetic Honeycombs

Cited by 18 publications

References 21 publications

Free Vibration and Bending of Gradient Auxetic Plate Using Finite Element Method

Free Vibration and Bending of Gradient Auxetic Plate Using Finite Element Method

Quasi-static axial crushing of honeycomb paperboard filled with foam particles

3D Printing Auxetic Architectures for Hypertrophic Scar Therapy

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