Crushing Strength of Aluminum Honeycomb with Thinning Cell Wall

Ogasawara, Nagahisa; Chiba, Norimasa; Kobayashi, Eiji; Kikuchi, Yuji

doi:10.1299/jmmp.4.1338

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…At present, the research on aluminum honeycomb structures in academia is mainly concentrated on GAHPs, however, this can provide the basis and methods for studies on BAHPs. Bai et al [4][5][6] focused on a unit of the honeycomb core and by combining the folding element theory and the principle of energy conservation, considered the influence of an interfacial adhesive to theoretically predict the effects under out-of-plane compressions. Considering a Y-shaped structure, it was found that debonding has a significant influence on the mechanical properties of the core, and the debonding occurring on the outer edge is the most critical for a particular damage area.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Simulation Studies on the Compressive Properties of Brazed Aluminum Honeycomb Plates and a Strength Prediction Method

Jiang

Xiao

Zhang

et al. 2020

Metals

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To study the compressive mechanical properties of a new type of brazed aluminum honeycomb plate (BAHP), tensile tests on single- and brazed-cell walls as well as compression tests in the out-of-plane, in-plane longitudinal, and transverse directions were conducted. Compared to the material properties of a traditional glued aluminum honeycomb plate (GAHP), those of the single- and brazed-cell walls of the BAHP are entirely different. Therefore, their characteristics should be considered separately when performing theoretical and simulation analysis. Under out-of-plane compression, the core of the BAHP did not debond, owing to its higher strength than that of the GAHP. In comparison, under in-plane compression in the longitudinal and transverse directions, the load–displacement characteristics, ultimate load, and failure modes also differed, and there was no large-scale cracking. Considering the characteristics of the BAHP, a strength prediction method was proposed. The simulation results demonstrated that the model built based on the new method was highly consistent with the experimental results. Defects with uneven height and debonding will cause the overall instability, and the degree of defects will influence the strength and instability displacement, which have little impact on the elastic stage. Moreover, the model considering defects is closer to the test results.

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Section: Introductionmentioning

confidence: 99%

Experimental and Simulation Studies on the Compressive Properties of Brazed Aluminum Honeycomb Plates and a Strength Prediction Method

Jiang

Xiao

Zhang

et al. 2020

Metals

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“…These panels have high specific strength and high specific rigidity while maintaining light weight. In addition, they are superior in impact absorption when the uniform compressive load is applied over the entire face sheet, because of the buffer effect of the core layer (Ogasawara, et al, 2010;Miller, et al, 2011). On the other hand, when local compressive load such as drop weight impact is vertically applied on the face sheet of the sandwich panel, the face sheet will be deflected and the core layer will be crushed near the point of action at relatively low load (Rathbun, et al, 2006;Kobayashi, et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Estimation method of support reaction on face sheet of sandwich panel by inverse analysis of deformed shape data

Kishimoto

Kobayashi

Ohtsuka

et al. 2016

Mechanical Engineering Journal

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When local compressive load is vertically applied on the face sheet of the sandwich panel, the face sheet will be deflected and the core layer will be crushed at relatively low load. In order to evaluate the mechanical property of the sandwich panel subjected to the local compression, it is important to estimate the reaction on the face sheet supported by the core layer. However it is difficult to directly measure the support reaction because the core layer has been crushed. This paper describes a novel method to estimate the support reaction on the face sheet of the sandwich panel by inverse analysis of the deformed shape data of the face sheet. In this method, the finite element method based on strain increment theory is applied to the face sheet using the measured deflection of the face sheet as the boundary condition. Then it estimates the nodal load of the finite element model of the face sheet that is equivalent to the support reaction by the Tikhonov regularization. In order to demonstrate the validity of the proposed method, numerical simulations have been performed. In the numerical simulations, the several support conditions of the face sheet were given in advance. Then the direct analysis was applied to obtain the correct support reaction and the deformed shape of the face sheet in each condition. The inverse analysis was applied on the simulation data of the deformed shape to estimate the support reaction. The results show that the support reaction estimated by the proposed method has good agreement with the correct value. Moreover, it is concluded that the proposed method requires the location of the support point as a priori information.

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“…Numerical, experimental and analytical investigation of cell walls etching and thinning process of hexagonal honeycomb was reported by Ogasawara et al (2010). The etching of the honeycomb was conducted in order to obtain a crush strength that is increasing linearly during the time.…”

Section: Introductionmentioning

confidence: 99%

Design, Development and Numerical Analysis of Honeycomb Core With Variable Crushing Strength

Esfahlani¹

2013

American Journal of Engineering and Applied Sciences

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A honeycomb core with half-circular cut-away sections at the spine (the adjoining cell walls) is designed and developed and numerically tested under axial dynamic load condition. The parametric study is invoked to identify the effect of various circular cut-away dimensions. In one embodiment a half-circular shaped cuts are removed from the top of the cell where the cell is impacted and its radius decreases toward the trailing edge of the cell. Numerical (FE) analysis was performed using explicit ANSYS/LS-DYNA and LS-DYNA codes to investigate the crushing performance, where impact angles 30° and 90° was combined with velocity of 5:3 m/sec. The crushing strength and internal energy absorption of the modified honeycomb cores with cut-away sections are then monitored to define the design parameters. The representative Ysection (axisymmetric model) is used for numerical analysis which simulates the honeycomb crushing performance. The numerical results of these innovative models show cyclic buckling effect in which crushing strength increases linearly as the rigid wall passes through. The FE results are validated with corresponding published experiments of the original unmodified honeycomb core (without cut-away).

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Crushing Strength of Aluminum Honeycomb with Thinning Cell Wall

Cited by 5 publications

References 8 publications

Experimental and Simulation Studies on the Compressive Properties of Brazed Aluminum Honeycomb Plates and a Strength Prediction Method

Experimental and Simulation Studies on the Compressive Properties of Brazed Aluminum Honeycomb Plates and a Strength Prediction Method

Estimation method of support reaction on face sheet of sandwich panel by inverse analysis of deformed shape data

Design, Development and Numerical Analysis of Honeycomb Core With Variable Crushing Strength

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