Hybrid hierarchical square honeycomb with widely tailorable effective in-plane elastic modulus

Wang, Zhonggang; Deng, Junjie; Liu, Kai; Tao, Yong

doi:10.1016/j.tws.2021.108816

Cited by 38 publications

(4 citation statements)

References 58 publications

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“…A novel avenue for lightweight research has emerged through the optimization of core's topologies. Diverse periodic sandwich structures, including grid [9,10,11] , laminated [12,13] , pyramidal [14,15,16] , curved[ 17 , 18 and other types of lattices [19,20] have been produced.…”

Section: Introductionmentioning

confidence: 99%

Load-bearing behaviors of sandwich plates with non-uniformly distributed grid cores: Dynamic impact and blast

Wang,

Ruan,

Hao

et al. 2024

Preprint

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Sandwich plates with grid-core structures possess extensive applications, and non-uniform grid plates (NUGPs) show enhanced potential under varied loading modes. The current study embarks on an investigation into non-uniform grid-core plates (NUGP) by adjusting the dimensions of transverse and longitudinal grid walls. This comprehensive analysis explores the dynamic responses of these plates when subjected to impact and blast loads, focusing on deformation patterns, damage, and the underlying processes. The findings are illustrated as follows. 1) NUGPs, specifically those with an optimized configuration of grid walls termed the d2 structure, display improved resistance to blast and impact loads compared to their uniformly distributed grid plate counterparts. Notably, designs featuring a less dense grid in the central area yield a more evenly distributed damage pattern under impact loads and a lesser severity of damage from blast loads. 2) The study also reveals that under impact loads, the sandwich structure showcases distinct behaviors through three stages evident in the load-displacement curves: initial localized indentation, followed by overall deformation, and ending with deformation recovery. 3) Moreover, when facing blast loads, the initial response involves rapid plastic deformation of the upper skin, succeeded by compression and buckling of the core. This sequence effectively dissipates energy, acting as a protective shield for the lower skin. 4) The optimized NUGP design achieves a perfect balance between stiffness and ductility, reducing displacement through adequate stiffness while ensuring the effective absorption of dynamic forces through significant ductility, thus preventing catastrophic failure. This research significantly advances topology optimization for sandwich plates, providing essential insights for designing lightweight structures resilient under various modes.

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Section: Introductionmentioning

confidence: 99%

Load-bearing behaviors of sandwich plates with non-uniformly distributed grid cores: Dynamic impact and blast

Wang,

Ruan,

Hao

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…A novel avenue for lightweight research has emerged through the optimization of core's topologies. Diverse periodic sandwich structures, including grid [ 9 , 10 , 11 , laminated [12,13 , pyramidal [14,15,16 , curved [17,18 and other types of lattices [19,20 have been produced. In addition, many scholars have focused on optimizing common sandwich plate configurations by individually varying the geometric dimensions of each component.…”

Section: Introductionmentioning

confidence: 99%

Load-bearing behaviors of sandwich plates with non-uniformly distributed grid cores: Dynamic impact and blast

Wang,

Yang,

Chen

et al. 2024

Preprint

View full text Add to dashboard Cite

Sandwich plates with grid-core structures possess extensive applications, and non-uniform grid plates (NUGPs) show enhanced potential under varied loading modes. The current study embarks on an investigation into NUGPs by adjusting the dimensions of transverse and longitudinal grid walls. This comprehensive analysis explores the dynamic responses of these plates when subjected to impact and blast loads, focusing on deformation patterns, damage, and the underlying processes. The findings are illustrated as follows. 1) NUGPs, specifically those with an optimized configuration of grid walls termed the d2 structure, display improved resistance to blast and impact loads compared to their uniformly distributed grid plate counterparts. Notably, designs featuring a less dense grid in the central area yield a more evenly distributed damage pattern under impact loads and a lesser severity of damage from blast loads. 2) The study also reveals that under impact loads, the sandwich structure showcases distinct behaviors through three stages evident in the load-displacement curves: initial localized indentation, followed by overall deformation, and ending with deformation recovery. 3) Moreover, when facing blast loads, the initial response involves rapid plastic deformation of the upper skin, succeeded by compression and buckling of the core. This sequence effectively dissipates energy, acting as a protective shield for the lower skin. 4) The optimized NUGPs design achieves a perfect balance between stiffness and ductility, reducing displacement through adequate stiffness while ensuring the effective absorption of dynamic forces through significant ductility, thus preventing catastrophic failure. This research significantly advances topology optimization for sandwich plates, providing essential insights for designing lightweight structures resilient under various modes.

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“…It was shown that the compressive strength, specific energy absorption, and crush force efficiency of the SHH are much greater than those of the RSH. As has been discussed above, both hierarchical design approaches can enhance the mechanical properties of honeycombs [ 27 ]. Hence, for better mechanical properties, the hybrid hierarchical square honeycomb (HHSH) combining the geometric features of both edge- and vertex-based hierarchy was investigated by Tao et al [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

In-Plane Elastic Properties of 3D-Printed Graded Hierarchical Hexagonal Honeycombs

Tao,

Zhao,

Shi

et al. 2024

Polymers

Self Cite

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In this study, the graded hierarchical hexagonal honeycomb (GHHH) integrating gradient design and hierarchical design was fabricated using the 3D-printing technique, and its in-plane elastic properties were investigated theoretically, experimentally, and numerically. Theoretical solutions were developed based on the Euler beam theory to predict the effective elastic modulus and Poisson’s ratio of GHHH, and theoretical values were in good agreement with the experimental and numerical results. The effect of gradient design and hierarchical design on the in-plane elastic properties of GHHH was also analyzed and compared. Results showed that the hierarchical design has a more significant effect on Poisson’s ratio and adjusting the internal forces of GHHH compared with the gradient design. In addition, it was found that GHHH exhibited higher stiffness compared with regular hexagonal honeycomb (RHH), graded hexagonal honeycomb (GHH), and vertex-based hierarchical hexagonal honeycomb (VHHH) under the constraint of the same relative density, respectively. Specifically, the effective elastic modulus of GHHH can be enhanced by 119.82% compared to that of RHH. This research will help to reveal the effect of integrating hierarchical design and gradient design on the in-plane elastic properties of honeycombs.

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Hybrid hierarchical square honeycomb with widely tailorable effective in-plane elastic modulus

Cited by 38 publications

References 58 publications

Load-bearing behaviors of sandwich plates with non-uniformly distributed grid cores: Dynamic impact and blast

Load-bearing behaviors of sandwich plates with non-uniformly distributed grid cores: Dynamic impact and blast

Load-bearing behaviors of sandwich plates with non-uniformly distributed grid cores: Dynamic impact and blast

In-Plane Elastic Properties of 3D-Printed Graded Hierarchical Hexagonal Honeycombs

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