Mechanical Properties of Auxetic Cellular Material Consisting of Re-Entrant Hexagonal Honeycombs

Zhang, Xiangwen; Yang, Deqing

doi:10.3390/ma9110900

Cited by 50 publications

(32 citation statements)

References 29 publications

(34 reference statements)

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“…FEM and AM used in conjunction could facilitate such a parametric study with relative ease, for example by varying repeated structures [262]. AM structure's Poisson's ratio can be tuned by altering the geometry of a unit cell [263][264][265], enabling the design and analysis of novel auxetic structures using FEM [266,267] to help validate existing analytical formulae. Matlab has also been used to run FEM parametric analysis [167].…”

Section: Additively Manufactured Auxetic Materials and Structuresmentioning

confidence: 99%

Review of Auxetic Materials for Sports Applications: Expanding Options in Comfort and Protection

Duncan

Shepherd

Moroney³

et al. 2018

Applied Sciences

224

151

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Following high profile, life changing long term mental illnesses and fatalities in sports such as skiing, cricket and American football-sports injuries feature regularly in national and international news. A mismatch between equipment certification tests, user expectations and infield falls and collisions is thought to affect risk perception, increasing the prevalence and severity of injuries. Auxetic foams, structures and textiles have been suggested for application to sporting goods, particularly protective equipment, due to their unique form-fitting deformation and curvature, high energy absorption and high indentation resistance. The purpose of this critical review is to communicate how auxetics could be useful to sports equipment (with a focus on injury prevention), and clearly lay out the steps required to realise their expected benefits. Initial overviews of auxetic materials and sporting protective equipment are followed by a description of common auxetic materials and structures, and how to produce them in foams, textiles and Additively Manufactured structures. Beneficial characteristics, limitations and commercial prospects are discussed, leading to a consideration of possible further work required to realise potential uses (such as in personal protective equipment and highly conformable garments).

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Section: Additively Manufactured Auxetic Materials and Structuresmentioning

confidence: 99%

Review of Auxetic Materials for Sports Applications: Expanding Options in Comfort and Protection

Duncan

Shepherd

Moroney³

et al. 2018

Applied Sciences

224

151

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“…By comparing with honeycomb metamaterials by Zhang et al [ 43 ], the stiffness properties of the novel metamaterials are demonstrated. Comparison in Table 2 shows that the novel metamaterials exhibit higher specific stiffness values than honeycomb.…”

Section: Evaluation Methods Of Static Properties Of Metamaterialsmentioning

confidence: 99%

Design Method of Lightweight Metamaterials with Arbitrary Poisson’s Ratio

2018

Self Cite

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A heuristic approach to design lightweight metamaterials with novel configurations and arbitrary Poisson’s ratio is studied by using the functional element topology optimization (FETO) method. Mathematical model of the optimization problem is established, where the minimization of the mass is set as the objective, then a series of metamaterials with Poisson’s ratio ranging from −1.0 to +1.0 are designed by solving this model. The deformation resistance and vibration reduction performance of the novel metamaterials and conventional honeycomb are compared by numerical simulations. Specific stiffness analysis shows that the novel metamaterials are 5.6 to 21.0 times more resistant to deformation than that of the honeycomb, and frequency response shows about 60% improvement in vibration reduction performance. Finally, the lightweight effects of the novel metamaterials on deformation resistance and vibration reduction performance are analyzed, and further analysis reflects that the lightweight effects increase with the increase of the absolute value of the Poisson’s ratio.

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“…One such unique spatially arranged structure produces a negative Poisson's ratio (NPR); these are called auxetics. Similar to other types of mechanical metamaterials, the NPR of auxetics is generally a direct consequence of the topology, where the joints rotate to move the structure . This property of NPR materials makes them undergo volumetric expansion and contraction when they are stretched and compressed, respectively, allowing them to show compliant‐bending behavior.…”

Section: Introductionmentioning

confidence: 99%

Toward a Smart Compliant Robotic Gripper Equipped with 3D‐Designed Cellular Fingers

Kaur

Kim

2019

Advanced Intelligent Systems

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In article number http://doi.wiley.com/10.1002/aisy.1900019, Manpreet Kaur and Woo Soo Kim developed 3D‐printed polymers structured with a unique truss design that can be “tuned” to different rigidities from soft and rubbery to hard and metallic. 3D printing gives the ability to manufacture the fingers very efficiently by integrating actuator, pressure sensor and 3D cellular body. A robotic gripper capable of adeptly handling soft objects without breaking or puncturing the objects. The designed cellular body system can potentially be utilized to cover a wide range of robotic applications.

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Mechanical Properties of Auxetic Cellular Material Consisting of Re-Entrant Hexagonal Honeycombs

Cited by 50 publications

References 29 publications

Review of Auxetic Materials for Sports Applications: Expanding Options in Comfort and Protection

Review of Auxetic Materials for Sports Applications: Expanding Options in Comfort and Protection

Design Method of Lightweight Metamaterials with Arbitrary Poisson’s Ratio

Toward a Smart Compliant Robotic Gripper Equipped with 3D‐Designed Cellular Fingers

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