Experimental and numerical studies on the compressive mechanical properties of the metallic auxetic reentrant honeycomb

Dong, Zhichao; Li, Ying; Zhao, Tian; Wu, Wenwang; Xiao, Dengbao; Liang, Jun

doi:10.1016/j.matdes.2019.108036

Cited by 146 publications

(58 citation statements)

References 32 publications

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“…Despite the difference in Poisson's ratio values, the critical strain for stable Poisson's ratio among the samples of different sizes is only slightly increased as the number of cells is increased. The effect of the cell number effect agrees with the observations by others . The influence of the edge might be associated with constraints of the edge on the operative deformation modes, including potential shear‐induced deformation.…”

Section: Discussionsupporting

confidence: 89%

“…In every case, the critical strains for a stable Poisson's ratio of the MSs are higher than the normal MR model (Figure b). For compression loading, out of shape in‐plane deformation has also been observed by other experimental and numerical works in compression tests of MR and other auxetic structures, which may have an adverse effect on the design uncertainty and shape control processes. So, the improvement on the stability with structures MS‐1 and MS‐2 could be a beneficial advantage to the structure design and development depending on the application.…”

Section: Discussionmentioning

confidence: 64%

“…The effect of the cell number effect agrees with the observations by others. [31,[52][53][54] The influence of the edge might be associated with constraints of the edge on the operative deformation modes, including potential shear-induced deformation. In simulation and experimental studies on the tensile behavior of tetrachiral honeycombs, [53,54] it was found that the auxeticity of the system decreases upon increasing the number of repeating units in the system.…”

Section: Discussionmentioning

confidence: 99%

“…The deformation of porous materials under a compression load is more complex than simple uniaxial tension loading. The deformation of different auxetic structures under compression has been increasingly studied, such as negative Poisson's convex–concave foams, re‐entrant unit cell, disordered auxetic metamaterials, cellular frameworks, arrowhead structures, and missing‐rib (MR) auxetic structures . Yang et al studied the behavior of auxetic structures under compression using both static model and dynamic finite‐element (FE) modeling.…”

Section: Introductionmentioning

confidence: 99%

“…The properties, such as stiffness, Poisson's ratio, and efficiency in shock absorption were found to be dependent on the structure and material combinations. Dong et al studied the compressive mechanical properties of the metallic auxetic re‐entrant honeycomb. The work found that the modeling results were affected by the number of cells used in the FE model.…”

Section: Introductionmentioning

confidence: 99%

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Numerical and Experimental Studies on the Deformation of Missing‐Rib and Mixed Structures under Compression

Tang

Wang

et al. 2020

Physica Status Solidi (b)

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Auxetic materials are an active research area with many potential applications. [1-8] There are many mechanisms/structures that have been developed to generate negative Poisson's ratio behaviors, including re-entrant structures, chiral structures, rotating rigid/semirigid units and angle-ply laminates. [7-15] These established mechanisms and the capacity of designing Poisson's ratio through controlled heterogeneity have opened up the possibility of developing material systems with targeted Poisson's ratios. The unique properties of auxetic structures lead to a wide range of applications, such as novel fasteners, biomedical applications, energy-absorbing devices, acoustic dampers, membrane filters with variable permeability, personal protective equipment, smart implant, actuators, and sensors. [12-16] These applications targeted require a detailed understanding of deformation of auxetic structures at both local cell level (beam bending, rotation, buckling, and contact) and macroscales (e.g., sample deformation) to balance the mechanical requirements as well as the functional properties. [17-27] In addition, the stability of Poisson's ratio and auxeticity under different loading modes and strain levels is also important. The deformation of porous materials under a compression load is more complex than simple uniaxial tension loading. The deformation of different auxetic structures under compression has been increasingly studied, [28-37] such as negative Poisson's convex-concave foams, [30] re-entrant unit cell, [31-34] disordered auxetic metamaterials, [35] cellular frameworks, [36] arrowhead structures, [29] and missing-rib (MR) auxetic structures. [29-37] Yang et al. [29] studied the behavior of auxetic structures under compression using both static model and dynamic finite-element (FE) modeling. The results show that auxetic materials could be effective in reducing the shock forces. The properties, such as stiffness, Poisson's ratio, and efficiency in shock absorption were found to be dependent on the structure and material combinations. Dong et al. [31] studied the compressive mechanical properties of the metallic auxetic re-entrant honeycomb. The work found that the modeling results were affected by the number of cells used in the FE model. Wang et al. [33] compared the characterization of composite 3D re-entrant auxetic cellular structures made from carbon fiber-reinforced polymer and single materials. The composite re-entrant auxetic structure showed the potential to significantly increase the specific stiffness of the structure. Remennikov et al. [34] studied the quasi-static compression and drop hammer impact tests of sandwich panel with re-entrant honeycomb design. The results suggest that sandwich panels with a re-entrant honeycomb core have a strong potential for enhancing the performance of lightweight impact-resistant protective systems. Apart from research on single mechanism structures, several works have been reported, exploring the use of mixed structures (MSs), which combined auxetic structures o...

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 64%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical and Experimental Studies on the Deformation of Missing‐Rib and Mixed Structures under Compression

Tang

Wang

et al. 2020

Physica Status Solidi (b)

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Novel Planar Auxetic Metamaterial Perforated with Orthogonally Aligned Oval‐Shaped Holes and Machine Learning Solutions

2021

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Auxetic metamaterials with negative Poisson's ratio have attracted much attention due to their counterintuitive deformation behavior over the conventional engineering materials. However, it is difficult to describe the complex correlation between microstructure parameters and auxeticity by analytical or empirical solutions in the form of math expressions. Herein, the machine learning (ML) model with artificial neural network (ANN) is developed to analyze a novel planar auxetic metamaterial designed by introducing orthogonally aligned oval‐shaped perforations in solid base material, and its feasibility is demonstrated through the experimental and finite element method (FEM) solutions. It is found that the proposed structure involving less design parameters exhibits the best performance at the aspects of auxetic behavior and stress level than those with peanut‐shaped holes and elliptic holes. Moreover, the results of parameter analysis demonstrate that the present ML solution model can provide accurate predicting results rapidly for this problem, without the limitations of explicit solution expressions which are typically not available in practice. The ML model allows one to obtain the desired auxetic property by tailoring the geometric parameters effectively and accelerate auxetic metamaterial design.

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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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Experimental and numerical studies on the compressive mechanical properties of the metallic auxetic reentrant honeycomb

Cited by 146 publications

References 32 publications

Numerical and Experimental Studies on the Deformation of Missing‐Rib and Mixed Structures under Compression

Numerical and Experimental Studies on the Deformation of Missing‐Rib and Mixed Structures under Compression

Novel Planar Auxetic Metamaterial Perforated with Orthogonally Aligned Oval‐Shaped Holes and Machine Learning Solutions

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

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