Effect of Cell Geometry on the Shear Modulus and on Density of Sandwich Panel Cores

Abstract

A simple analytic theory for the effect of cell geometry on both the shear modulus and the density of sandwich panel core is presented. The core shear modulus in different directions is analyzed to include the effects of the angle α and the aspect ratio b/a of the cell. It is also found that the minimum cell weight of the sandwich core depends both on the cell angle α and the cell aspect ratio b/a. The theory compares fairly well with some available experiments. The cell geometry chosen is so general that the regular hexagonal and square cells of commercial sandwich cores are special cases.

Assessment of the Refined Zigzag Theory for bending, vibration, and buckling of sandwich plates: a comparative study of different theories

“…The first papers were mainly dedicated to a limited set of engineering constants [3][4][5][6][7][8], whereas only recently some theories have been proposed where the whole set of elastic constants is calculated as the result of a more general approach. For example, in [9], an energy-based approach is proposed where the strain energy of the effective core is equal to that in the equivalent medium.…”

Experimental Research and Numerical Analysis of the Elastic Properties of Paper Cell Cores before and after Impregnation

“…Lightweight sandwich panels with a paper core are successfully used in many industries. Dominates especially in the aerospace industry [1,2], shipbuilding [3][4][5], automotive [6], buildings construction and in the furniture industry [7][8][9][10]. The cores of such panels most often have a honeycomb structure providing the panels with satisfactory mechanical properties due to the excellent ratio of relative density to their stiffness and strength [11][12][13][14].…”

Bending Behavior of Lightweight Wood-Based Sandwich Beams with Auxetic Cellular Core

“…Honeycomb, light sandwich panels with a paper core are successfully used in many industries. These materials are commonly used in aeronautics and shipbuilding [ 1 , 2 , 3 , 4 ], car industry [ 5 ], construction materials, and the furniture industry [ 6 , 7 , 8 , 9 ]. Thanks to the periodic structure of the honeycomb core, such composites are often designed with honeycomb and a hexagonal structure that provides satisfactory mechanical properties due to the excellent ratio of relative density to their overall stiffness and strength [ 10 , 11 , 12 , 13 ].…”