Elastic properties of chiral, anti-chiral, and hierarchical honeycombs: A simple energy-based approach

Mousanezhad, Davood; Haghpanah, Babak; Ghosh, Ranajay; Hamouda, A.M.S.; Nayeb-Hashemi, Hamid; Vaziri, Ashkan

doi:10.1016/j.taml.2016.02.004

Cited by 291 publications

(139 citation statements)

References 67 publications

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“…The results for the re-entrant hexagonal configurations have been calculated using the typical formulas contained in [1], for internal cell angles ranging from -40° to -10° and cell wall aspect ratios equal to 1.0, 1.2, 1.4, 1.6, 1.8, 2.0. The choice of these angles stems from avoiding the extremely large anisotropy along the 1-direction when the internal cell angle is near to zero, The data representing the anti-tetra-chiral are obtained using equations sourced from [46], for cell wall aspect ratio r/L varying from 0.05 to 0.45 and a constant cell wall thickness ratio t/L of 0.1. The results of the novel auxetic configuration have also been calculated with internal cell angles ranging from -40° to -10°, and cell wall aspect ratios of 1.0, 1.2, 1.4, 1.6, 1.8, 2.0 while the other parameters keep constants.…”

Section: Comparison With Existing Auxetic Configurationsmentioning

confidence: 99%

In-plane elasticity of a novel auxetic honeycomb design

Huang

Zhang

Scarpa

et al. 2017

Composites Part B: Engineering

124

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: http://www.bristol.ac.uk/pure/about/ebr-terms Abstract: This work presents a novel negative Poisson's ratio honeycomb design composed by two parts (a re-entrant hexagonal component and a thin plate part) that provide separate contributions to the in-plane and out-of-plane mechanical properties. The re-entrant hexagons provide the in-plane negative Poisson's ratio, the in-plane compliance and the out-of-plane compressive strength, while the thin plate part connecting the re-entrant hexagonal section bears the large out-of-plane flexibility. This paper focuses on the in-plane mechanical properties of the auxetic cellular structure. Theoretical models related to the in-plane uniaxial tensile modulus, the shear modulus, and the Poisson's ratios have been built and validated using the finite element techniques. The in-plane behavior of the honeycomb has also been investigated against the geometrical parameters of the unit cell using a parametrical analysis. The theoretical and numerical models illustrate good agreement and show the potential of its application in morphing structures. We also provide a benchmark of the auxetic configuration proposed in this work against negative Poisson's ratio topologies from open literature.

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Section: Comparison With Existing Auxetic Configurationsmentioning

confidence: 99%

In-plane elasticity of a novel auxetic honeycomb design

Huang

Zhang

Scarpa

et al. 2017

Composites Part B: Engineering

124

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“…Simulations reveal that such “patchy” PAEs with specific binding sites across their surfaces would have unique self‐assembly behavior, but the currently synthesizable patchy particles have yet to produce crystalline materials with long‐range order . However, if successful, anisotropic control over assembly could enable creation of exotic analogs to atomic symmetries including quasicrystals, chiral lattices, or high‐entropy alloys . Research developments in chemistry will therefore be required to access the full programmable potential of the PAE building block.…”

Section: Future Areas Of Investigation For Pae Crystallizationmentioning

confidence: 99%

Programmable Atom Equivalents: Atomic Crystallization as a Framework for Synthesizing Nanoparticle Superlattices

Gabrys

Zornberg

Macfarlane

2019

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Decades of research efforts into atomic crystallization phenomenon have led to a comprehensive understanding of the pathways through which atoms form different crystal structures. With the onset of nanotechnology, methods that use colloidal nanoparticles (NPs) as nanoscale “artificial atoms” to generate hierarchically ordered materials are being developed as an alternative strategy for materials synthesis. However, the assembly mechanisms of NP‐based crystals are not always as well‐understood as their atomic counterparts. The creation of a tunable nanoscale synthon whose assembly can be explained using the context of extensively examined atomic crystallization will therefore provide significant advancement in nanomaterials synthesis. DNA‐grafted NPs have emerged as a strong candidate for such a “programmable atom equivalent” (PAE), because the predictable nature of DNA base‐pairing allows for complex yet easily controlled assembly. This Review highlights the characteristics of these PAEs that enable controlled assembly behaviors analogous to atomic phenomena, which allows for rational material design well beyond what can be achieved with other crystallization techniques.

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“…Xia et al theoretically analyze the elastic modulus of the 3D isotropic anti‐tetra‐chiral structure and the structural samples were prepared using Nylon SLS technology and experimentally studied. Besides, some other scholars have done a lot of further work on the mechanical properties and applications of the chiral structure.…”

Section: Introductionmentioning

confidence: 99%

Research on In‐plane Quasi‐Static Mechanical Properties of Gradient Tetra‐Chiral Hyper‐Structures

Zhu

et al. 2019

Adv Eng Mater

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Chiral hyper-structure is a family of lightweight structure with negative Poisson's ratio, which leads benefit in mechanical properties and designability. In order to further improve some mechanical properties of chiral hyperstructures, the concept of gradient is introduced into the structure. Five groups of gradient tetra-chiral hyper-structure with different gradient factors are fabricated based on waterjet cutting technology, and the in-plane quasistatic lateral compression tests are carried out. Finite element models are developed for the in-plane linear elastic mechanical properties and plastic deformation modes under lateral compression condition. Theoretical prediction models of elastic modulus in gradient direction and Poisson's ratio of the gradient tetra-chiral hyper-structure is derived based on geometric assumptions and inhomogeneous deformation mode which are verified by experiments and finite element analysis. Simultaneously, the effects of gradient factors on the deformation characteristics and mechanical behaviors of the tetra-chiral hyper-structure are discussed and analyzed.

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Elastic properties of chiral, anti-chiral, and hierarchical honeycombs: A simple energy-based approach

Cited by 291 publications

References 67 publications

In-plane elasticity of a novel auxetic honeycomb design

In-plane elasticity of a novel auxetic honeycomb design

Programmable Atom Equivalents: Atomic Crystallization as a Framework for Synthesizing Nanoparticle Superlattices

Research on In‐plane Quasi‐Static Mechanical Properties of Gradient Tetra‐Chiral Hyper‐Structures

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