Optimization of transverse shear moduli for composite honeycomb cores

Qiao, Pizhong; Fan, Wei; Davalos, Julio F.; Zou, Guang Ping

doi:10.1016/j.compstruct.2008.04.011

Cited by 22 publications

(4 citation statements)

References 18 publications

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“…Research has revealed that effective optimizations of the equivalent transverse shear stiffness of honeycombs are crucial for the analysis and design of sandwich structures. In [17], a multi-objective method was employed to maximize the performance of the transverse shear behavior of three typical honeycombs consisting of sinusoidal, tubular, and hexagonal geometries. In earlier studies, most of the honeycombs containing traditional topologies of cell structures such as a square, an equilateral triangle or a regular hexagon, always featured a positive Poisson's ratio.…”

Section: Introductionmentioning

confidence: 99%

Band gap analysis of star-shaped honeycombs with varied Poisson’s ratio

Meng

Deng

Zhang

et al. 2015

Smart Mater. Struct.

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In this paper, star-shaped honeycombs are analyzed in terms of their equivalent mechanical behaviors and band gap properties. Firstly, by applying Castigliano’s second theorem, the effective Young’s modulus and Poisson’s ratio are derived by an analytical method used in structural mechanics. On the basis of Bloch’s theorem, the dispersion characteristics are then analyzed by the dynamic matrix in conjunction with the Wittrick–Williams (W–W) algorithm. It should be noted that the presented method can form a more simple stiffness and mass matrices of the proposed structures, compared with the traditional finite element (FE) method. Thereafter, the effects of the geometrical parameters on the effective constants and band gaps are investigated and discussed. Numerical results demonstrate that the negative Poisson’s ratio provides an enhanced effective Young’s modulus of the considered honeycombs. Furthermore, the band gap exists in a much lower frequency region with an unchanged summing band gap width when the Poisson’s ratio is in negative values. In general, the work can serve as a guide for the optimal design of cellular structures.

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Section: Introductionmentioning

confidence: 99%

Band gap analysis of star-shaped honeycombs with varied Poisson’s ratio

Meng

Deng

Zhang

et al. 2015

Smart Mater. Struct.

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“…Examples of Cellular Materials customized to offer maximum possible stiffness using different cellular structures such as 2D honeycombs [92,93], 3D lattices [94,95], and 3D closed-cell foams [96] are found in the literature. Tailored Cellular Materials have been also used to maximize transverse shear stiffness in honeycomb cores [97,98]. Studies of applications including the use of Cellular Materials to enhance buckling behavior [99], tune stress localization, minimize stress levels [100], and engineer failure location for specific load conditions [101] are limited.…”

Section: Tailoring Stiffness Via Cellular Materialsmentioning

confidence: 99%

A Review on Tailoring Stiffness in Compliant Systems, via Removing Material: Cellular Materials and Topology Optimization

2021

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Cellular Materials and Topology Optimization use a structured distribution of material to achieve specific mechanical properties. The controlled distribution of material often leads to several advantages including the customization of the resulting mechanical properties; this can be achieved following these two approaches. In this work, a review of these two as approaches used with compliance purposes applied at flexure level is presented. The related literature is assessed with the aim of clarifying how they can be used in tailoring stiffness of flexure elements. Basic concepts needed to understand the fundamental process of each approach are presented. Further, tailoring stiffness is described as an evolutionary process used in compliance applications. Additionally, works that used these approaches to tailor stiffness of flexure elements are described and categorized. Finally, concluding remarks and recommendations to further extend the study of these two approaches in tailoring the stiffness of flexure elements are discussed.

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“…Banerjee et al 22 developed a methodology for the maximization of the specific transverse shear strength of reinforced honeycombs and prediction of the corresponding cell geometry. Qiao et al 23 adopted a combined multi‐objective optimization and homogenization approach to optimize effective transverse shear moduli for composite honeycomb cores. Under the shear load, interfacial debonding between the core structure and the skin is one of the primary failure modes of sandwich composite materials.…”

Section: Introductionmentioning

confidence: 99%

Shear performance assessment of repaired honeycomb sandwich composite panels: An experimental and numerical study

et al. 2023

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This article presents an effective test method for evaluating the shear performance of repaired honeycomb sandwich panels consisting of glass fiber/epoxy matrix skin and Nomex honeycomb core. Addressing the insufficient research on the shear performance of honeycomb sandwich panels after repair in existing literature, this study conducted mechanical performance tests on the honeycomb sandwich panels before and after repair using the picture frame test method. Surface strain measurements are obtained using digital image correlation (DIC) techniques, and load–displacement and shear stress–strain curves are generated from the experimental results. The study concludes that the repair method utilized in this investigation is effective in restoring the mechanical properties of the sandwich panels. In addition, finite element models of the honeycomb sandwich panels before and after repair are established, and a comparative analysis is conducted between the experimental and simulation results. The study examines the shear modulus, ultimate load, and failure mode of the repaired and unrepaired specimens. The findings verify the feasibility of the picture frame test method for evaluating the shear performance of honeycomb sandwich panels. This study provides valuable insights into the design of shear performance repair for honeycomb sandwich panels and offers theoretical support for material recycling.

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Optimization of transverse shear moduli for composite honeycomb cores

Cited by 22 publications

References 18 publications

Band gap analysis of star-shaped honeycombs with varied Poisson’s ratio

Band gap analysis of star-shaped honeycombs with varied Poisson’s ratio

A Review on Tailoring Stiffness in Compliant Systems, via Removing Material: Cellular Materials and Topology Optimization

Shear performance assessment of repaired honeycomb sandwich composite panels: An experimental and numerical study

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