Crashworthiness of innovative hexagonal honeycomb-like structures subjected to out-of-plane compression

Wang, Zhonggang; Shi, Chong; Ding, Sansan; Liang, Xifeng

doi:10.1007/s11771-020-4321-2

Cited by 24 publications

(3 citation statements)

References 20 publications

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“…When evaluating energy absorption efficiency, the hexagonal honeycomb demonstrated the maximum energy absorbent efficiency of 65%, compared to 44% and 52% for the re-entrant and suggested RCA structures, respectively. For in-plane the compression process, the proposed structure has a negative Poisson ratio exhibiting anisotropy mechanical properties.Using experimental quasi-static testing, Nadkarni et al(2020) investigated the crushing behavior of an aluminum honeycomb composite under out-of-plane compressive stresses.It may be inferred that the aluminum honeycomb structure offers an excellent balance between strength and weight and a steady crush force having predictable properties, consequently making it a preferred choice for many energy-absorbing operations [25][26]. Qiu et al…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Out-of-Plane Crushing of Reinforced Honeycomb Core and Effect of Cell Parameters on its Properties

Mohan,

Gautam,

dabral

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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The non-linear finite element code LS-DYNA has been used in this work to conduct the crushing examination of both normal and reinforced honeycomb cores. The honeycomb-like cores are provided with out-of-plane quasi-static conditions of stress via an explicit dynamic approach. We have parametrically investigated the effects of cell properties on crushed behaviour as well as the absorption of energy, including the size of the cell, wall thickness, height, along with cell wall tilted position. Regular honeycomb (R0-HC), reinforced every other ribbon (R1-HC), and reinforced every ribbon (R2-HC) are three different varieties of honeycomb. The findings of the numerical analysis of these three types of honeycomb are compared to understand how reinforcing affects energy absorption and crushing parameters. The sheet material AA3003-H18 was chosen to make the honeycomb core. In comparison to ordinary honeycombs, the reinforced honeycombs demonstrated superior crushing behavior and energy absorption. In comparison to the others, reinforced every ribbon (R2-HC) type honeycombs exhibited the greatest values for crushing characteristics and energy absorption. The crushing characteristics and energy absorption of reinforced every other ribbon (R1-HC) honeycombs were higher than those of ordinary honeycombs (R0-HCThe crushing force, average plateau force, and energy absorption values decrease as the cell size, height, and wall angle are increased, however, all these crushing characteristics increase as the cell wall thickness is increased.

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Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Out-of-Plane Crushing of Reinforced Honeycomb Core and Effect of Cell Parameters on its Properties

Mohan,

Gautam,

dabral

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…The quasi-honeycomb sandwich structure, which consists of combined cells formed by the arrangement optimization of quadrilateral or hexagonal cells, has the better coplanar bearing capacity, stability, and heat dissipation in comparison with the honeycomb structure. 1,2 However, the uniform quasi-honeycomb structure fails to make full use of the mechanical properties of materials. The topology optimization can obtain the optimal distribution of materials through redistributing the relative densities of topology elements, and is adopted to improve the strength, stiffness, and specific energy absorption of a sandwich structure.…”

Section: Introductionmentioning

confidence: 99%

Variable-density topology optimization and bending test of quasi-honeycomb sandwich structures

Zhang

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The topology optimization is considered to enhance the strength, stiffness, and specific energy absorption of a quasi-honeycomb sandwich structure since it can achieve the optimal distribution of materials. However, the existing material interpolation models do not make the topology structure have good clarity and stability. In the present study, a novel variable-density topology optimization based on an improved interpolation model is developed for the design of a quasi-honeycomb core. The combined cells are circularly spreading outward from the geometric center of the design domain, and the wall thickness function of the equivalent cell (i.e. a simplified model of the combined cell) is established on the basis of relative density. The SR material interpolation model is modified by adding the minimum elastic modulus term, fitting the weighting and penalty factors, and adopting the volume constraint of Bi-directional Evolutionary Structural Optimization (BESO). The optimization is conducted to minimize the compliance of the quasi-honeycomb core, in which the relative densities of equivalent cells are chosen as the design variables due to the mapping between topology elements and equivalent cells. The three-dimensional (3D) geometric models of original and optimized quasi-honeycomb cores, upper face sheets, and lower face sheets are built using SolidWorks and printed on a 3D printer. The deflection, strain, bending stiffness, and energy absorption under different material retention rates, restraint positions, and face sheet thicknesses are investigated by three-point bending tests. It is found that the improved SR material interpolation model is efficient for suppressing the grid dependence and checkerboard, and the mechanical properties of optimized quasi-honeycomb sandwich structures are significantly enhanced in comparison with original structures, confirming that the developed method provides important guidance for designing and optimizing the quasi-honeycomb sandwich structure.

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Effect of Hierarchical Geometries Matching on the Crashworthiness of Honeycomb

et al. 2023

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The demand for lightweight engineering structures to serve as structural components and energy absorbers has been on the rise in recent times. [1][2][3][4][5][6] As a typical engineering material, cellular structures have been extensively applied in several fields, including railway, [7] structural engineering, [8] aviation, [9] and biomedical field. [10] The application of cellular structures is attributed to specific desired properties, including lightweight, high energy absorption capacity, excellent impact resistance, and high strength-to-weight ratios. [11,12] Cellular structures take the form of either honeycomb (which is a two-dimensional array of identical prismatic cells that nest together to fill a plane) or foam (a polyhedral three-dimensional cell that packs together to fill space). [5] The mechanical properties and crashworthiness of cellular structures mainly depend on their geometric configuration and base material properties. [13,14] By taking advantage of the flexibility in geometric configurations, continuous research is being done on cellular structures with experimental, numerical, and theoretical approaches to achieve desired and tailorable mechanical properties. [15][16][17] These researches attempt to improve further the mechanical properties of the cellular structures for better and broader application scope. Consequently, some promising areas relating to cellular structures have been gaining lots of attention, including hierarchical cellular structures, [18][19][20][21] multicell tubes, [18,22] functionally graded structures, [23] corrugated tubes, [24] metamaterial structures, [25][26][27] multicornered structures, [28] and staggered cellular structure. [29] The development of industries toward more efficient performance has led to the continuous desire for improved lightweight and better energy absorption properties. Honeycombs with structural hierarchy have shown promising potential to offer excellent crashworthiness characteristics.Materials possessing structural hierarchy have been extensively observed in nature, [19,30] as can be seen in beetle elytron, [31] spider web, [32] bone, [33] tendon, [34] bamboo, [35] pomelo peel, [36] and grass stem. [37] Excellent crashworthiness is attributed to the hierarchical strategy, which has inspired the design of several novel honeycomb structures possessing superior mechanical properties. [38,39] Hierarchical structures are cellular materials composed of secondary substructural components having a complete structure. [40] In a broad sense, structural hierarchy can be achieved in two primary forms. [20] They are the vertex-based hierarchy (which is developed by replacing the vertices of the parent structure with substructures) and the edgebased hierarchy

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Crashworthiness of innovative hexagonal honeycomb-like structures subjected to out-of-plane compression

Cited by 24 publications

References 20 publications

Numerical Analysis of Out-of-Plane Crushing of Reinforced Honeycomb Core and Effect of Cell Parameters on its Properties

Numerical Analysis of Out-of-Plane Crushing of Reinforced Honeycomb Core and Effect of Cell Parameters on its Properties

Variable-density topology optimization and bending test of quasi-honeycomb sandwich structures

Effect of Hierarchical Geometries Matching on the Crashworthiness of Honeycomb

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