Study of three‐point bending behaviors of composite sandwich structure with re‐entrant honeycomb cores

Liu, Zhikang; Liu, Jingxi; Zhang, Mangong; Liu, Jiayi; Huang, Wei

doi:10.1002/pc.27128

Cited by 10 publications

(5 citation statements)

References 30 publications

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“…Varying the wall thickness of the re-entrant unit cell was performed in a positive or negative order (Xu et al, 2023). It has been found that the negative gradient re-entrant core showed improved impact resistance, reduced transverse shear deformation (Liu et al, 2023a(Liu et al, , 2023cShao et al, 2021) and better energy absorption (Liu et al, 2023c). Another category of gradient core was used by researchers, which was the size gradient.…”

Section: Gradient Re-entrant Corementioning

confidence: 99%

Review on impact, crushing response and applications of re-entrant core sandwich structures

Al-Khazraji

2024

AEAT

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Purpose Auxetic sandwich structures are gaining attention because of the negative Poisson’s ratio effect offered by these structures. Re-entrant core was one configuration of the auxetic structures. There is a growing concern about the design and behavior of re-entrant cores in aerospace, marine and protection applications. Several researchers proposed various designs of re-entrant core sandwiches with various materials. The purpose of this study is to review the most recent advances in re-entrant core sandwich structures. This review serves as a guide for researchers conducting further research in this wide field of study. Design/methodology/approach The re-entrant core sandwich structures were reviewed in terms of their design improvements, impact and quasi-static crushing responses. Several design improvements were reviewed including 2D cell, 3D cell, gradient, hierarchical and hybrid configurations. Some common applications of the re-entrant core sandwiches were given at the end of this paper with suggestions for future developments in this field. Findings Generally, the re-entrant configuration showed improved energy absorption and impact response among auxetic structures. The main manufacturing method for re-entrant core manufacturing was additive manufacturing. The negative Poisson’s ratio effect of the re-entrant core provided a wide area of research. Originality/value Generally, re-entrant cores were mentioned in the review articles as part of other auxetic structures. However, in this review, the focus was solely made on the re-entrant core sandwiches with their mechanics.

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Section: Gradient Re-entrant Corementioning

confidence: 99%

Review on impact, crushing response and applications of re-entrant core sandwich structures

Al-Khazraji

2024

AEAT

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“…Lightweight, wave-transmitted, thermal-insulated, and high-strength composites have always been a hot spot in the research, because they have a widespread needs and broad application potential in aerospace, military, marine, and transportation fields. [1][2][3] The design of lightweight structures, such as honeycomb sandwich panel, [4][5][6] corrugated sandwich plate, 7,8 and foam sandwich panel, 9,10 is one of the most effective methods to obtain lightweight and high-strength composites. In recent years, numerous researches have been conducted on the sandwich structural composites.…”

Section: Introductionmentioning

confidence: 99%

Lightweight three‐dimensional woven Kevlar/glass hybrid composites with enhanced mechanical, dielectric, and thermal insulation properties

Zheng,

Wang,

Yang

et al. 2024

Polymer Composites

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Polymer composites with lightweight, ultralow dielectric constant, excellent thermal insulation and mechanical properties are in high demand in aerospace, transport, wireless communications and other fields. In this work, the three‐dimensional woven Kevlar/glass hybrid composites (3DKGC) with lightweight, high strength, excellent dielectric and thermal insulation properties were obtained with the Kevlar fiber and glass fiber as the raw materials. The results showed that the volume content of air in 3DKGC is over 82% and the volume density is as low as 0.29 g·cm−3, while the compression strength is as high as 7.68 MPa. 3DKGC exhibits an ultra‐low dielectric constant of 1.21. The wave transmission performance of 3DKGC was simulated using the CST software. The simulation results showed that 3DKGC has a return loss of 0.036 and a gain of 0.9982. Moreover, the 3DKGC provides superior thermal insulation than three‐dimensional woven Kevlar composites (3DKC) and conventional polystyrene foams. In summary, this work offers an attractive material that holds significant potential for application in aerospace, wireless communications and other fields where lightweight multi‐purpose composites are required.Highlights 3D woven Kevlar/glass hybrid composites (3DKGC) were proposed and fabricated. 3DKGC exhibits low density of 0.29 g·cm−3 but high compression stress (7.68 MPa). 3DKGC possesses outstanding dielectric and thermal insulation properties. 3DKGC leverages the benefits of cost‐effectiveness and holistic functionality.

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“…(2) Large in-plane deformation: Currently considered in-plane deformation range is: 20 of swept back angle, 200% of span chord ratio, and 50% of wing area. 12 (3) Out-of-plane load carrying capacity [13][14][15] : Resistance to aerodynamic loads is required to prevent deformation and damage to the airfoil during flight. (4) Recyclable 8 : Able to be used stably for a certain period to enhance the reliability of morphing aircraft.…”

mentioning

confidence: 99%

Cycle deformation behavior of 3D‐printed CF/PEEK honeycomb metamaterials with zero Poisson's ratios

Han,

Wang,

Zhang

2023

Polymer Composites

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To realize the one‐dimensional deformation of morphing wings, zero Poisson's ratio (ZPR) honeycomb metamaterials have become a popular research topic due to their lightweight, low in‐plane modulus, and high out‐of‐plane strength. A ZPR honeycomb metamaterial is designed and prepared from short‐cut carbon fiber‐reinforced polyetheretherketone (CF/PEEK) by a 3D printer. The mechanical properties of ZPR honeycomb metamaterials were tested to determine their tensile and bending stiffness. The results show that the metamaterial can achieve 62.3% ± 3.3% in‐plane elastic deformation after optimized structure design. At the same time, metamaterial has a certain bending resistance to keep the airfoil from normal buckling deformation. Moreover, a new test method for evaluating the cycle deformation behavior of flexible morphing wings is proposed. The high‐speed cyclic tension‐compression test showed that H22‐t0.6‐CT has the best stability, which may be related to its lower porosity (2.15% ± 0.12%). These results indicate that ZPR honeycomb metamaterials have great application prospects in the field of morphing wings.Highlights The printed CF/PEEK wire is treated as a transversely isotropic material. ZPR honeycomb metamaterial allows for more than 50% in‐plane deformation. A new test method to evaluate the cyclic deformation behavior.

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Study of three‐point bending behaviors of composite sandwich structure with re‐entrant honeycomb cores

Cited by 10 publications

References 30 publications

Review on impact, crushing response and applications of re-entrant core sandwich structures

Review on impact, crushing response and applications of re-entrant core sandwich structures

Lightweight three‐dimensional woven Kevlar/glass hybrid composites with enhanced mechanical, dielectric, and thermal insulation properties

Cycle deformation behavior of 3D‐printed CF/PEEK honeycomb metamaterials with zero Poisson's ratios

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