TY - JOUR

T1 - Effects of solid distribution on the out-of-plane elastic properties of hexagonal honeycombs

AU - Lin, Ting Chun

AU - Yang, Mei Yi

AU - Huang, Jong Shin

N1 - Funding Information:
The financial support of the National Science Council, Taiwan, ROC, under Contract Numbers NSC 93-2911-I-006-017-2 and NSC 95-2211-E006-331 is gratefully acknowledge. The author, M.Y. Yang, would like to thank Professor Wilfried Becker, Darmstadt University of Technology, Germany, for his valuable suggestions and discussions during the course of this study.

PY - 2013/6

Y1 - 2013/6

N2 - A three-dimensional representative volume element model with appropriate periodic boundary conditions is proposed and employed to numerically calculate the out-of-plane elastic properties of hexagonal honeycombs with variable-thickness and curved cell edges. The FEA numerical results indicate that the out-of-plane shear modulus, compressive buckling strength and shear buckling strengths of regular hexagonal honeycombs are significantly affected by the solid distribution in cell edges. Meanwhile, the compressive and shear buckling strengths of hexagonal honeycombs can be enhanced dramatically as the curvature of cell edges becomes much larger. The theoretical expressions of the shear modulus, compressive buckling strength and shear buckling strengths of hexagonal honeycombs with variable-thickness and curved cell edges can also be expressed as the product of those with same relative density and constant-thickness and straight cell edges, and two cell-geometry coefficients to account for the effects of the solid distribution in cell edges.

AB - A three-dimensional representative volume element model with appropriate periodic boundary conditions is proposed and employed to numerically calculate the out-of-plane elastic properties of hexagonal honeycombs with variable-thickness and curved cell edges. The FEA numerical results indicate that the out-of-plane shear modulus, compressive buckling strength and shear buckling strengths of regular hexagonal honeycombs are significantly affected by the solid distribution in cell edges. Meanwhile, the compressive and shear buckling strengths of hexagonal honeycombs can be enhanced dramatically as the curvature of cell edges becomes much larger. The theoretical expressions of the shear modulus, compressive buckling strength and shear buckling strengths of hexagonal honeycombs with variable-thickness and curved cell edges can also be expressed as the product of those with same relative density and constant-thickness and straight cell edges, and two cell-geometry coefficients to account for the effects of the solid distribution in cell edges.

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U2 - 10.1016/j.compstruct.2013.01.007

DO - 10.1016/j.compstruct.2013.01.007

M3 - Article

AN - SCOPUS:84875316873

SN - 0263-8223

VL - 100

SP - 436

EP - 442

JO - Composite Structures

JF - Composite Structures

ER -