A novel star auxetic honeycomb with enhanced in-plane crushing strength

Wei, Lulu; Zhao, Xuan; Yu, Qiang; Zhu, Guohua

doi:10.1016/j.tws.2020.106623

Cited by 156 publications

(45 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…Many experimental and numerical studies have been studied the axial crushing behavior of these tubes up to now. [5][6][7][8][9][10][11][12] Furthermore, it is very essential to establish the theoretical model of energy absorption response for analyzing the performance of energy absorption structure.…”

Section: Introductionmentioning

confidence: 99%

Theoretical prediction model of mean crushing force of CFRP‐Al hybrid circular tubes under axial compression

Bai

et al. 2021

Polymer Composites

View full text Add to dashboard Cite

The CFRP-Al hybrid thin-walled structure combines the dual advantages of carbon fiber reinforced plastics (CFRP) and metal, which is one of the crucial methods for both lightweight and high strength. This study aimed to explore the theoretical prediction of the mean crushing force of the hybrid tubes with different winding angles subjected to axial compression. In order to construct the theoretical model of the hybrid structural energy absorption response, the failure modes, and deformative behavior of the hybrid tubes are analyzed and summarized based on the axial compression experiments. Considering the effects of winding angles on the energy dissipation and deformation characteristic of hybrid circular tubes, the expressions of membrane force and binding energy per unit length are obtained. Then, the analytical model is established to predict the mean crushing force of the CFRP-Al hybrid circular tube. Furthermore, the results of the prediction model are compared according to different failure criteria of composite materials. The findings show that the predicted values of the maximum stress failure are more consistent with the experimental values, in which the discrepancy between analytically predicted and experimentally tested mean crushing forces of these hybrid tubes is no more than 10%. The results can provide a basis for the design of the composite-metal hybrid thin-walled tube.

show abstract

“…The mechanical properties of auxetic metamaterials primarily depend on the relative density and the importance of this parameter exceeds those of others in lattice or porous materials [27]. The relative densities of a hybrid auxetic metamaterial system with different core unit cells and lateral missing ribs can be calculated by inspection as:…”

Section: Relative Densitymentioning

confidence: 99%

“…The same Authors discussed how star or triangular shaped perforated sheets can be made to exhibit negative Poisson's ratio [19]. More recently, various star-shaped metamaterials have been investigated in terms of their specific equivalent mechanical behavior, band gap properties and impact energy absorption performance [20][21][22][23][24][25][26][27]. By introducing re-entrant core cells to the center of a basic chiral cell, Jiang et al [8] have designed new hybrid chiral mechanical metamaterials with cell-opening mechanisms under very large range nonlinear geometric and materials strains.…”

Section: Introductionmentioning

confidence: 99%

“…19 More recently, various star-shaped metamaterials have been investigated in terms of their specific equivalent mechanical behavior, band gap properties, and impact energy absorption performance. [20][21][22][23][24][25][26][27] By introducing reentrant core cells to the center of a basic chiral cell, Jiang et al 8 have designed new hybrid chiral mechanical metamaterials with cell-opening mechanisms under very large range nonlinear geometric and material strains. The authors of the present article have proposed a novel auxetic metamaterial configuration based on a reentrant core and lateral ligaments, together with a cross missing rib grid of same dimensions as a benchmark.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical properties of a hybrid auxetic metamaterial and metastructure system

Zhang

Zhao

Sun

et al. 2021

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

We propose in this work an innovative hybrid auxetic metamaterial with a centersymmetric unit cell and tessellation topology similar to the one provided by the missing rib configuration. The tessellation proposed is applied to different core unit cells (star shape, cross-chiral shape with same dimensions, and reentrant). The effects of the geometric parameters of the cells on the in-plane mechanical properties of this hybrid auxetic metamaterial system are investigated via finite elements (FEMs). Representative unit cells (RUCs) with optimal mechanical behaviors are identified; those configurations exhibit the larger negative Poisson’s ratios and enhanced specific moduli. Designs related to two groups of auxetic metastructures with cylindric and cubic shapes are then developed based on the optimized RUCs along x and y directions. The equivalent mechanical performance of these metastructures under internal pressure is evaluated from a numerical standpoint. Auxetic cylindrical metastructures can be tailored by adjusting the number of the optimized RUCs along the circumferential and longitudinal directions, together with the geometric parameters of the optimized RUC itself. These hybrid auxetic metamaterials and metastructures provide the potential for multifunctional applications in biomechanics, flexible electronics, and aerospace.

show abstract

A novel star auxetic honeycomb with enhanced in-plane crushing strength

Cited by 156 publications

References 44 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

Theoretical prediction model of mean crushing force of CFRP‐Al hybrid circular tubes under axial compression

Mechanical properties of a hybrid auxetic metamaterial and metastructure system

Contact Info

Product

Resources

About