Investigation on Mechanical Properties and Equivalent Model of Aluminum Honeycomb Sandwich Panels

Cai, Liangcai; Zhang, Duoyao; Zhou, Shaohui; Xu, Wei

doi:10.1007/s11665-018-3771-2

Cited by 22 publications

(7 citation statements)

References 12 publications

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“…When the honeycomb sandwich panel bears the bending load, the bending load is applied on the outer surface of the face-sheet, causing the stress in the face-sheets. The core layer mainly bears the sheer force and transmit the sheer force from one face-sheet to the other [ 30 , 31 ]. Under the same deformation, both the bending force on the face-sheets layer and the shear force on the core layer decrease with the decrease of the Young’s modulus at a higher temperature.…”

Section: Resultsmentioning

confidence: 99%

High Temperature Mechanical Properties of a Vented Ti-6Al-4V Honeycomb Sandwich Panel

Shang

Fang

et al. 2020

Materials

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For aerospace applications, honeycomb sandwich panels may have small perforations on the cell walls of the honeycomb core to equilibrate the internal core pressure with external gas pressure, which prevent face-sheet/core debonding due to pressure build-up at high temperature. We propose a new form of perforation on the cell walls of honeycomb sandwich panels to reduce the influence of the perforations on the cell walls on the mechanical properties. In this paper, the high temperature mechanical properties of a new vented Ti-6Al-4V honeycomb sandwich panel were investigated. A vented Ti-6AL-4V honeycomb sandwich panel with 35Ti-35Zr-15Cu-15Ni as the filler alloy was manufactured by high-temperature brazing. The element distribution of the brazed joints was examined by means of SEM (scanning electron microscopy) and EDS (energy-dispersive spectroscopy) analyses. Compared to the interaction between the face-sheets and the brazing filler, the diffusion and reaction between the honeycomb core and the brazing filler were stronger. The flatwise compression and flexural mechanical properties of the vented honeycomb sandwich panels were investigated at 20, 160, 300, and 440 °C, respectively. The flatwise compression strength, elastic modulus, and the flexural strength of the vented honeycomb sandwich panels decreased with the increase of temperature. Moreover, the flexural strength of the L-direction sandwich panels was larger than that of the W-direction sandwich panels at the same temperature. More importantly, the vented honeycomb sandwich panels exhibited good compression performance similar to the unvented honeycomb sandwich panels, and the open holes on the cell walls have no negative effect on the compression performance of the honeycomb sandwich panels in these conditions. The damage morphology observed by SEM revealed that the face-sheets and the brazing zone show ductile and brittle fracture behaviors, respectively.

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Section: Resultsmentioning

confidence: 99%

High Temperature Mechanical Properties of a Vented Ti-6Al-4V Honeycomb Sandwich Panel

Shang

Fang

et al. 2020

Materials

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“…Current studies on sandwich structures mainly focus on bending properties, [1][2][3][4][5][6] compressive properties, [7][8][9][10][11][12] and energy absorption properties. [13][14][15][16][17][18][19][20] The basic form of the sandwich structure currently used in engineering applications consists of two thin, strong face plates and a lightweight core material that is filled between the face plates and firmly connected to them. There are many materials used for the face plates, such as aluminum, stainless steel, composite laminates etc.…”

Section: Introductionmentioning

confidence: 99%

Review of carbon fiber-reinforced sandwich structures

Zhao

Yang

Chen

et al. 2022

Polymers and Polymer Composites

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This paper first reviews the research progress of carbon fiber-reinforced sandwich plates with grid cores, truss cores, and foam cores, and the results can be summarized in the following four points. 1) The load-bearing capacity and energy absorption capacity of grid-core and foam-core structures under bending loads have been improved by toughening with short fibers and Z-pinned fibers. 2) The progressive buckling mode of the core layer under compressive loading can significantly improve the energy absorption capacity of a sandwich structure. 3) The compressive failure of a truss-core sandwich structure is closely related to the strength at the nodes. 4) Following a literature review, this paper discusses the existing problems in sandwich structures and the corresponding countermeasures, and the results can be summarized in the following two points. 1) After implementing the current toughening measures, the debonding is improved to a certain extent; however, this approach does not prevent debonding. 2) No method has been presented that can increase the strength of the end nodes in truss-core members. Therefore, it is encouraging that a trabeculae/honeycomb-core sandwich structure composed of fiber-reinforced proteins—mimicking the biological structure found in a beetle forewing—can effectively solve the abovementioned problems.

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“…10 This subject has been examined by many researchers. 11–18 A new concept called effective core stiffness was proposed to include the skin’s effect of face sheet, and was analyzed by analytical homogenization method. However, in their studies, the face sheet was assumed to be infinite rigid, so that the influence of face sheet rigidity cannot be taken into account appropriately.…”

Section: Introductionmentioning

confidence: 99%

Equivalent in-plane elastic modulus of honeycomb sandwich in the direction of cell vertical wall

Fan

2021

Jnl of Sandwich Structures & Materials

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The equivalent in-plane elastic modulus [Formula: see text] of a honeycomb sandwich in the direction of cell vertical wall can be assessed by the law of mixture from the modulus of face sheet [Formula: see text] and the equivalent modulus of honeycomb core [Formula: see text]. However, significant errors as large as 40% can be made depending on material and geometry parameters, when the used [Formula: see text] is obtained from a cellular model of core alone without considering the skin effect of face sheet. The main reason of the error is that the rigidity to deformation of y-direction is different greatly between the vertical cell wall of core and inclined cell wall of core. In the present paper, an analytical model is proposed to assess [Formula: see text] of honeycomb sandwich with considering the interference effect of the core with the face sheet. In the proposed model, the influence of the face sheet rigidity on [Formula: see text] is taken into account. The results demonstrate that the contribution of the core to [Formula: see text] is also dependent on the face sheet rigidity significantly. The validity of presented model is verified by comparing the results with numerical results of FEA.

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Investigation on Mechanical Properties and Equivalent Model of Aluminum Honeycomb Sandwich Panels

Cited by 22 publications

References 12 publications

High Temperature Mechanical Properties of a Vented Ti-6Al-4V Honeycomb Sandwich Panel

High Temperature Mechanical Properties of a Vented Ti-6Al-4V Honeycomb Sandwich Panel

Review of carbon fiber-reinforced sandwich structures

Equivalent in-plane elastic modulus of honeycomb sandwich in the direction of cell vertical wall

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