Load-bearing behaviors of sandwich plates with non-uniformly distributed grid cores: static compression and bending

Hao, Ning; Wang, Youlong; Song, Yiheng; Ruan, Sihan; Ma, Quanjin; Wang, Ziying

doi:10.1007/s10853-023-09059-1

Cited by 6 publications

(2 citation statements)

References 38 publications

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“…The honeycomb cell wall thickness t and length l are selected so that the homogeneous F2CCZ core and the honeycomb core exhibit the same relative density. The geometric dimensions of the investigated sandwich panel are based on the sandwich structures manufactured and tested by Kotzem et al [27], Hao et al [46]. Thus, the core thickness is set to h (c) = 36 mm, and the core thickness to face sheet thickness is h (c) /h ( f ) = 12.…”

Section: Resultsmentioning

confidence: 99%

Mechanical Performance Comparison of Sandwich Panels with Graded Lattice and Honeycomb Cores

Georges,

García Solera,

Aguilar Borasteros

et al. 2024

Biomimetics

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The design of graded and multifunctional lattice cores is driven by the increasing demand for high-performance components in lightweight engineering. This trend benefits from significant achievements in additive manufacturing, where the lattice core and the face sheets are fabricated simultaneously in a single print job. This work systematically compares the mechanical performance of sandwich panels comprising various graded lattice cores subjected to concentrated loads. In addition to graded lattice cores, uniform lattices and conventional honeycomb cores are analyzed. To obtain an optimized graded lattice core, a fully stressed design method is applied. Stresses and displacements are determined using a linear elastic analytical model that allows grading the core properties in a layerwise manner through the core thickness. The analysis indicates the superior performance of graded lattice cores compared to homogeneous lattice cores. However, conventional honeycombs outperform graded lattice cores in terms of load-to-weight ratio and stiffness-to-weight ratio. This study provides valuable insights for the design of lattice core sandwich panels and the advantages of several design approaches.

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Section: Resultsmentioning

confidence: 99%

Mechanical Performance Comparison of Sandwich Panels with Graded Lattice and Honeycomb Cores

Georges,

García Solera,

Aguilar Borasteros

et al. 2024

Biomimetics

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“…1. This approach is particularly advantageous because adjusting the uniformity of grid patterns can potentially lead to significant improvements in structural performance without necessitating additional material [23] . This is especially relevant under dynamic modes such as impact and blast loads.…”

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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Experimental and theoretical results for bending and buckling of a five-layer sandwich plate reinforced by carbon nanotubes/carbon nanorods/graphene platelets/shape memory alloy based on RFSDT

Noruzi,

Mohammadimehr,

Bargozini

2024

Arch Appl Mech

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Load-bearing behaviors of sandwich plates with non-uniformly distributed grid cores: static compression and bending

Cited by 6 publications

References 38 publications

Mechanical Performance Comparison of Sandwich Panels with Graded Lattice and Honeycomb Cores

Mechanical Performance Comparison of Sandwich Panels with Graded Lattice and Honeycomb Cores

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

Experimental and theoretical results for bending and buckling of a five-layer sandwich plate reinforced by carbon nanotubes/carbon nanorods/graphene platelets/shape memory alloy based on RFSDT

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