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

Lin, Ting; Yang, Mei Yi; Huang, Jong Shin

doi:10.1016/j.compstruct.2013.01.007

Cited by 12 publications

(3 citation statements)

References 16 publications

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“…Additionally, the periodic arrangement of cells plays a significant role. It has been observed that the crush strength depends on cell shape (hexagonal cells with different branch angles were studied) [18,19,20,21,22] and wall thickness [23,24,25,26]. The honeycomb structures were investigated with numerical analysis or experimentally in both in-plane [27,28,29,30,31] and out-of-plane directions [20,32,33,34,35,36] to obtain various parameters to provide answers about the mechanisms of failure.…”

Section: Introductionmentioning

confidence: 99%

Static and Dynamic Loading Behavior of Ti6Al4V Honeycomb Structures Manufactured by Laser Engineered Net Shaping (LENSTM) Technology

et al. 2019

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Laser Engineered Net Shaping (LENSTM) is currently a promising and developing technique. It allows for shortening the time between the design stage and the manufacturing process. LENS is an alternative to classic metal manufacturing methods, such as casting and plastic working. Moreover, it enables the production of finished spatial structures using different types of metallic powders as starting materials. Using this technology, thin-walled honeycomb structures with four different cell sizes were obtained. The technological parameters of the manufacturing process were selected experimentally, and the initial powder was a spherical Ti6Al4V powder with a particle size of 45–105 µm. The dimensions of the specimens were approximately 40 × 40 × 10 mm, and the wall thickness was approximately 0.7 mm. The geometrical quality and the surface roughness of the manufactured structures were investigated. Due to the high cooling rates occurring during the LENS process, the microstructure for this alloy consists only of the martensitic α’ phase. In order to increase the mechanical parameters, it was necessary to apply post processing heat treatment leading to the creation of a two-phase α + β structure. The main aim of this investigation was to study the energy absorption of additively manufactured regular cellular structures with a honeycomb topology under static and dynamic loading conditions.

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Section: Introductionmentioning

confidence: 99%

Static and Dynamic Loading Behavior of Ti6Al4V Honeycomb Structures Manufactured by Laser Engineered Net Shaping (LENSTM) Technology

et al. 2019

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“…Cell wall thicknesses and densities of porous materials have a very high effect on the mechanical properties of the materials. Li et al found that high relative density pores with cell edges of variable thickness provide higher compressive strength than conventional pores with cell edges of the constant thickness (Lin et al, 2013). When the studies are evaluated, it is seen that 3D printers stand out in areas such as biomedical (Arjunan et al, 2020;Rajabi et al, 2021) automotive (Vasco, 2021;Yuran and Yavuz, 2021), space and aviation (Kuntanapreeda and Hess, 2021).…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of PLA based closed porous structures manufactured using FDM process

YAVUZ

Yildirim

2023

MMMS

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PurposeThe purpose of this article covers the design and manufacture of porous materials that can be used in different engineering applications by additive manufacturing.Design/methodology/approachThe most important design parameters of the porous materials are the cell structure and wall thickness. These two design criteria are difficult to control in porous materials produced by conventional production methods. In the study, two different wall thicknesses and four different pore diameters of the porous structure were determined as design parameters.FindingsA compression test was applied to the produced samples. Also, the densities of the produced samples were compared. As a result of the study, changes in mechanical properties were observed according to the cell wall thickness and pore size.Originality/valueThe originality of the study is that, unlike traditional porous structure production, the pore structure and cell wall thicknesses can be produced in desired dimensions. In addition, a closed pore structure was tried to be produced in the study. Studies in the literature generally have a tube-type pore structure.

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“…A representative three-dimensional model of volume elements with appropriate periodic boundary conditions has been proposed by Lin et al [15] to calculate numerically the elastic properties out-of plane of the hexagonal honeycombs with edges of cells having variable and curved thicknesses. The authors have shown that the FEA numerical results indicate that the out-of-plane shear modulus, the compressive and shear buckling resistance of regular hexagonal honeycombs are significantly affected by the distribution of solids in the edges of the cells.…”

mentioning

confidence: 99%

Out-of-plane elastic constants of curved cell walls honeycombs

Harkati

Harkati²,

Bezazi³

et al. 2021

Composite Structures

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The work describes the out-of-plane properties of a curved wall honeycomb structure evaluated using analytical models and finite elements techniques. Out-of-plane properties are calculated using a theoretical approach based on energy theorems and validated using a fullscale finite element technique to simulate transverse shear tests. The effects of the curvature of the walls and the depth of the honeycomb cells on the out-of-plane elastic constants are evaluated and excellent agreement is observed between theoretical and numerical models.These curved cell wall honeycombs feature specific (i.e., relative density weighted) highly tailorable upper shear bounds that shift their maximum values with the radiuses of the curved cell walls at different internal cell angles. Finally, it is also shown that these honeycombs exhibit a particular topology with a specific upper boundary independent of the non-zero curvature cell wall adopted and only dependent upon the internal cell angle.

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

Cited by 12 publications

References 16 publications

Static and Dynamic Loading Behavior of Ti6Al4V Honeycomb Structures Manufactured by Laser Engineered Net Shaping (LENSTM) Technology

Static and Dynamic Loading Behavior of Ti6Al4V Honeycomb Structures Manufactured by Laser Engineered Net Shaping (LENSTM) Technology

Mechanical properties of PLA based closed porous structures manufactured using FDM process

Out-of-plane elastic constants of curved cell walls honeycombs

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