Investigation of elastic properties of paper honeycomb panels with rectangular cells

Smardzewski, Jerzy; Gajęcki, Adam; Wojnowska, Marlena

doi:10.15376/biores.14.1.1435-1451

Cited by 7 publications

(2 citation statements)

References 13 publications

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“…Smardzewski et al [17] conducted research to determine the effect of the rectangular cell shape of the paper core on the mechanical properties of three-layer furniture panels and compared them with the properties of a panel with hexagonal cells of the paper core with the same geometric parameters. The measurements were made for both main directions in the panel plane-machine direction and cross direction.…”

Section: Introductionmentioning

confidence: 99%

Method for Calculating the Bending Stiffness of Honeycomb Paperboard

Kmita-Fudalej,

Kołakowski,

Szewczyk

2024

Materials

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The article presents continued considerations presented in a prior publication on the development of a model for calculating the bending stiffness BS of cellular honeycomb paperboards, applying the strength properties of paper raw materials used for the production of paperboard and the geometric parameters of cellular board. The results of BS calculations obtained by using the analytical model presented in the prior publication were significantly overestimated in relation to the value obtained by measurements. The calculation error in relation to the measurement value for the tested group of paperboards in the case of bending stiffness in the machine direction MD was within the range from 23% to 116%, and the average error was 65%, while in the cross direction CD, it was within the range from 2% to 54%, and the average error was 31%. The calculation model proposed in this work based on the physical properties of cellular paperboard reduces the error values for bending stiffness in both the machine and cross directions. The value of the average error for both main directions in the paperboard plane was 10%. The method enables more accurate determination of BS in the machine direction MD and in the cross direction CD at the paperboard design stage. In order to validate the proposed analytical model, the calculation results were compared with the results of BS laboratory measurements performed using the four-point bending method and, in order to expand the group of tested paperboards, with the measurement results presented in the prior article for cardboards with different raw material composition and different geometric parameters.

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Section: Introductionmentioning

confidence: 99%

Method for Calculating the Bending Stiffness of Honeycomb Paperboard

Kmita-Fudalej,

Kołakowski,

Szewczyk

2024

Materials

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“…Thus, the composite can reduce the usage of formaldehyde-containing materials, which would only be applied as face sheets. Because of their high stiffness-to-weight and strength-to-weight ratios, sandwich composites have been recently receivinggreat attention [2][3][4][5][6]. However, the diverse raw materials used in the face and core layers of a sandwich composite make their mechanical properties, such as strength and deformation, more complex than homogeneous ones [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Compression Properties and Its Prediction of Wood-Based Sandwich Panels with a Novel Taiji Honeycomb Core

Hao

Oporto

et al. 2020

Forests

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The transverse compression property is one of most important aspects of the mechanical performance of a sandwich structure with a soft core. An experiment, analytical method and three digital strain measurement systems were applied to investigate the compression behavior and the failure mechanism for a wood-based sandwich structure with a novel Taiji honeycomb core. The results show that the structure of the Taiji honeycomb can improve dramatically on compression strength and modulus of composite compared to that of a traditional hexagonal one. There was no obvious deflection in the transverse direction detected by the three digital images before the buckling of the honeycomb occurred. An analytical equation between the key structure parameters and properties of the composite were applied to predict its threshold stresses and modulus. The properties of the core determine the strength of the entire structure, but the compression strength decreases slightly with an elevated core thickness, and its effect on the compression modulus can be neglected. Both the surface sheets and loading speed have little impact on the compression strength and modulus, respectively.

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