In-plane impact dynamics of honeycomb structure containing curved reentrant sides with negative Poisson’s ratio effect

Shen, Jianbang; Ge, Jingran; Xiao, Junhua; Liang, Jun

doi:10.1080/15376494.2020.1824285

Cited by 26 publications

(3 citation statements)

References 30 publications

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“…Fig. 25 displays the calculation models of FSCS with different cell layers, in which 2, 3,4,5,6,7,8,9,10,11,12,13,14 represent different number of cell layers. As the number of cell layers is 2, it means that there are two re-entrant octagon cells along X and Y direction respectively, existing the total number of 2 2 cells.…”

Section: Size Effects Of Unit Cellmentioning

confidence: 99%

“…Shen J. B. et al put forward a novel NPR structure containing curved re-entrant sides and dynamic behaviors were studied with the adoption of FE approach, and the results indicated that this NPR structure was equipped with outstanding energy absorption capacity compared with other structures witharc angles [11]. Zhang X. C. et al analyzed in-plane dynamic crushing behaviors and energyabsorbed characteristics of NPR honeycombs by means of explicit dynamic finite element analysis [12].…”

Section: Introductionmentioning

confidence: 99%

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Simulation and Experimental Analyses on Quasi-Static and Dynamic Performances of Four-Star Cellular Structure

et al. 2022

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A novel four-star cellular structure (FSCS) is proposed. Firstly, relative density of FSCS, regular octagons and regular hexagons are obtained accordingly. Then, their in-plane quasi-static and dynamic performances are conducted under the premise of equal number of cells, equal mass and equal relative density by adopting Hyperworks and Ls-Dyna software. Macroscopic deformation processes indicate that FSCS, regular octagons and regular hexagons are presented as "compressionshrinkage" negative Poisson's ratio deformation mode, "V" deformation mode and "X" deformation mode, respectively. Subsequently, size effects of unit cell are carried out, and as the number of cell layers reaches no less than 9, platform stress of FSCS gradually tends to be stable. To verify the accuracy of finite element (FE) simulation models, quasi-static compression test is executed on three-dimensional FSCS. The results indicate that FE simulation results agree well with experimental predictions, and the proposed FSCS is equipped with superior energy absorption capability.

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Section: Size Effects Of Unit Cellmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation and Experimental Analyses on Quasi-Static and Dynamic Performances of Four-Star Cellular Structure

et al. 2022

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“…In this study, external conditions were regarded as important influencing factors, rather than focusing on the geometric structural parameters of the structure itself. Shen et al [14] designed honeycomb structures with negative Poisson's ratio (NPR) curved concave edges. The Poisson's ratio and energy absorption capacity were studied with different arc angles at different compression speeds using finite element methods.…”

Section: Introductionmentioning

confidence: 99%

The Characteristics of the Deformation of a Feeding Roller with Double V-Wings Honeycomb under Driven Modes with Different Rotation Rates and Axial Compressions

Zhou,

Wang

2024

Applied Sciences

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In this work, the roller-shaped double V-wing honeycomb (DVWH) structure was used as the object, which was designed for forest harvesting machines. The deformation characteristics of its rotation under a specific compression were studied during the feeding process for the steel feeding roller used in the traditional combined harvesting machine for trees, which is prone to damaging the wood. The compression rate (10%–15%) and rotational speed (100 mm/s–320 mm/s) were used to analyze the relationship between compression rate, rotational speed, and deformation characteristics. The deformation characteristics, characterized by equivalent stress, radial displacement sensitivity, and energy absorption efficiency, were analyzed. The results show that the deformation characteristics of the roller-shaped DVWH structure under driven mode were more sensitive to compression rate and less sensitive to changes in rotational speed. There was a positive correlation between the equivalent stress of the node and the compression rate. The peak equivalent stress of the outermost node at 10% and 15% compression rates were 111.9 MPa and 230.9 MPa. There was a negative correlation between radial displacement–compression sensitivity and compression rate, and a decrease in radial displacement–compression sensitivity from 10% to 15% compression rate at different nodes ranges from 5% to 22%. The feed performance efficiency (EF) grew from 8.3% to 12.7% for a 1% increase in compression rate.

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Study of Mechanical Properties of a New 3D Re‐Entrant Lattice Auxetic Structure Under Bending

et al. 2023

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Herein, the mechanical behaviors of a new 3D re‐entrant lattice auxetic structure under bending are investigated. When a classical 3D re‐entrant lattice auxetic structure is subjected to uniaxial loading, only one 2D structural component can sustain the load, which limits the capability of the auxetic structure. By changing the connection mode of 2D components, a new 3D re‐entrant lattice auxetic structure that can exhibit both in‐ and out‐of‐plane negative Poisson's ratios is proposed. To investigate the bending response of the new structure, specimens with three different design parameters are additively manufactured, and their mechanical properties are studied with the four‐point bending test and finite element analysis. Compared to the classical 3D re‐entrant lattice structure, the new 3D re‐entrant lattice structure exhibits lower initial peak stress and higher energy absorption capacity. The underlying mechanism may be closely associated with the unique deformation pattern of auxetic structures under bending. The new re‐entrant auxetic structure expands the design space of 3D auxetic structures, especially for energy absorption and protection in impact scenarios.

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In-plane impact dynamics of honeycomb structure containing curved reentrant sides with negative Poisson’s ratio effect

Cited by 26 publications

References 30 publications

Simulation and Experimental Analyses on Quasi-Static and Dynamic Performances of Four-Star Cellular Structure

Simulation and Experimental Analyses on Quasi-Static and Dynamic Performances of Four-Star Cellular Structure

The Characteristics of the Deformation of a Feeding Roller with Double V-Wings Honeycomb under Driven Modes with Different Rotation Rates and Axial Compressions

Study of Mechanical Properties of a New 3D Re‐Entrant Lattice Auxetic Structure Under Bending

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