Fabrication and mechanical properties of CFRP composite three-dimensional double-arrow-head auxetic structures

Wang, Xintao; Wang, Bing; Wen, Zhihui; Ma, Li

doi:10.1016/j.compscitech.2018.05.014

Cited by 121 publications

(32 citation statements)

References 33 publications

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“…Gibson-Ashby cells analysed in [9]. This trend corresponds to the assumption that auxetic structures have lower stiffness and thus also lower value of Young's modulus or relative Young's modulus than conventional porous solids [10].…”

Section: Relative Young's Modulus With Respect To Relative Densitymentioning

confidence: 83%

Numerical Modelling of Compressive Characteristics of Auxetic Structures

Neühauserová

Koudelka

2018

APP

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The paper is focused on numerical analysis of mechanical behaviour of auxetic structures with re-entrant tetrakaidecahedral unit cell subjected to uni-axial quasi-static compression. The mechanical behaviour was evaluated inversely with respect to selected geometrical parameters of the unit cell and two different loading modes. Finite element method was used for the numerical analysis of the problem. A set of fully parametric tools has been developed, which enabled automated execution and evaluation of virtual experiments. From results of the simulations, Young’s modulus, the characteristics of the Poisson’s ratio function, and the deformation energy density were estimated. The relation between these characteristics and geometry of the unit cell, particularly the re-entrant angle and the relative density, was evaluated. Results of the numerical simulations for the unit cell and representative volume element of its three-dimensional periodic assembly are presented.

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Section: Relative Young's Modulus With Respect To Relative Densitymentioning

confidence: 83%

Numerical Modelling of Compressive Characteristics of Auxetic Structures

Neühauserová

Koudelka

2018

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“…Finally, another interesting point is that the trigonal and hexagonal models can be arranged in many different forms in space. Unlike the tetragonal model, there were only two different arrangement forms in space: sparse-arranged and densearranged, [13,53] which was mainly because it only has two orthogonal principle axes in the horizontal direction. However, both the trigonal and hexagonal models had three principal axes in the horizontal direction, so there were more forms of structural arrangement in space, as shown in Figure 8, which greatly increased the number of models with negative compressibility.…”

Section: Resultsmentioning

confidence: 99%

“…[1] In the past few decades, mechanical metamaterials with negative property have garnered considerable attention from researchers due to their particularity and the potential for being widely used in engineering applications, such as soundproofing, [2][3][4] protective [5][6][7] and biomedical [8] devices, and damping mechanisms. [9][10][11] So far, these studies have mainly focused on negative Poisson's ratio, [10][11][12][13][14][15] negative thermal expansion, [16][17][18] negative stiffness, [19,20] and negative compressibility. [21][22][23][24][25][26] Negative compressibility is a relatively new concept and, thus, understudied; it offers a neoteric insight into an unconventional behavior that some materials will expand in at least one direction, rather than shrink in all directions when subjected to hydrostatic pressure.…”

Section: Introductionmentioning

confidence: 99%

Negative Compressibility in Hexagonal and Trigonal Models Constructed by Hinging Wine‐Rack Mechanism

Zhou

Liu

et al. 2021

Physica Status Solidi (b)

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In our previous work, a monoclinic octahedron model based on the tetragonal octahedron model for the negative compressibility property was analyzed. To design a larger number of new models with greater negative compressibility property, an extensive study to propose the hexagonal and trigonal models constructed by a hinging wine‐rack mechanism is now conducted, according to the concept of the crystal system and the method to design new models by changing the system of models. The compressibility properties through theoretical modeling are analyzed, and the results show that the two models exhibit negative compressibility. Further analysis indicates that the two models have strong similarity with the tetragonal model, which can be analyzed uniformly, and the trigonal model has the greatest negative compressibility property among the three models, irrespective of the on‐axis or off‐axis compressibility property. Finally, owing to the particularity of the space configuration for the hexagonal and trigonal models, a series of new models with different spatial arrangements are proposed, which can greatly increase the number of models with negative compressibility.

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“…The more common is the geometry-related auxetic nature. Examples of cellular geometries, that give auxetic behaviour, are double arrow-head [33], re-entrant [34], chiral [35], and rotating rigid units [36]. They are used to produce foams or auxetic cellular metals, for a wide range of applications, such as aerospace, biomedical and military engineering [37].…”

Section: Introductionmentioning

confidence: 99%

The Development of a New Shock Absorbing Uniaxial Graded Auxetic Damper (UGAD)

Al-Rifaie

Sumelka

2019

Materials

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Auxetic structures are efficient cellular materials that can absorb blast/impact energy through plastic deformation, thus protecting the structure. They are developing sacrificial solutions with light weight, high specific strength, high specific toughness and excellent energy dissipating properties, due to its negative Poison’s ratio nature. The use of auxetic and non-auxetic panels in blast resistant structures had been relatively perceived by researchers. Nonetheless, implementation of those energy dissipaters, explicitly as a uni-axial passive damper is restrained to limited studies, which highlight the potential need for further explorations. The aim of this paper is the design of a new uniaxial graded auxetic damper (UGAD) that can be used as a blast/impact/shock absorber in different scales for different structural applications. First, the geometry, material, numerical model and loading are introduced. Then, a detailed parametric study is conducted to achieve the most efficient graded auxetic system. Moreover, the designed auxetic damper is numerically tested and its static and dynamic constitutive relations are derived and validated analytically. The selection of optimum parameters was based on the ratio of the reaction force to the applied load (RFd/P) and plastic dissipation energy (PDE). The final designed UGAD contains three auxetic cores that have the same geometry, material grade (6063-T4), size and number of layers equal to eight. The cell-wall thickness t of the three auxetic cores is 1.4 mm, 1.8 mm and 2.2 mm, respectively; composing a graded auxetic system. The performance of the three auxetic cores together have led to a wide plateau region (80% of total crushing strain) and variant strength range (1–10 MPa), which in return, can justify the superior performance of the UGAD under different blast levels. Finally, the 3D printed prototype of the UGAD is presented and the possible applications are covered.

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Fabrication and mechanical properties of CFRP composite three-dimensional double-arrow-head auxetic structures

Cited by 121 publications

References 33 publications

Numerical Modelling of Compressive Characteristics of Auxetic Structures

Numerical Modelling of Compressive Characteristics of Auxetic Structures

Negative Compressibility in Hexagonal and Trigonal Models Constructed by Hinging Wine‐Rack Mechanism

The Development of a New Shock Absorbing Uniaxial Graded Auxetic Damper (UGAD)

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