Octagonal auxetic metamaterials with hyperelastic properties for large compressive deformation

Hamzehei, Ramin; Kadkhodapour, Javad; Anaraki, Ali Pourkamali; Rezaei, Saeed; Dariushi, Soheil; Rezadoust, Amir Masoud

doi:10.1016/j.ijmecsci.2018.06.040

Cited by 66 publications

(25 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Marlow criterion was used to import input data to ABAQUS 6.14 software. 39 The static general step was chosen. The boundary conditions were defined according to Figure 2(a) for loading in the Y direction and Figure 2(b) for loading in the X direction.…”

Section: Methodsmentioning

confidence: 99%

Large deformation of TPU re-entrant auxetic structures designed by TO approach

Taherkhani

Anaraki

Kadkhodapour

et al. 2020

Journal of Elastomers & Plastics

Self Cite

View full text Add to dashboard Cite

Auxetic materials are a family of rationally designed artificial structures that have unique effective properties gained from the distribution of the internal architecture rather than of the chemical composition. This article used the modified solid isotropic material with penalization method for topology optimization of 2D re-entrant auxetic structures with different Poisson’s ratios and volume fractions. The obtained structures were verified by the finite-element method (FEM) using the commercial FEM software and also validated by the experimental approach. A good agreement was achieved between the experimental and numerical results. Then, the cell geometry effect on Poisson’s ratio under large tension was investigated. Our study revealed that the location and stiffness of rotation joints are two new parameters affecting Poisson’s ratio value. Poisson’s ratio will decrease by decreasing the stiffness of rotation joints and positioning the rotation joints closer to the middle of the structure. So, from the investigation of the optimizer performance, it was achieved that re-entrant auxetic structures with different Poisson’s ratios could be easily designed by changing just the location of rotation joints. This will be applicable in many applications like sensor field.

show abstract

Section: Methodsmentioning

confidence: 99%

Large deformation of TPU re-entrant auxetic structures designed by TO approach

Taherkhani

Anaraki

Kadkhodapour

et al. 2020

Journal of Elastomers & Plastics

Self Cite

View full text Add to dashboard Cite

show abstract

“…R3D4 element was selected as a rigid plate and the S4R element was considered by the TPU model. The As TPU is a high elastic and high strain material, its compression deformation is similar to rubber material [23]. Here, the Marlow criterion is selected to describe the mechanical properties of materials.…”

Section: Finite Element Modellingmentioning

confidence: 99%

“…where the U is energy per unit of reference volume, with dev U as its deviatoric part, vol U as its volumetric part; 1 I is the first deviatoric strain invariant; el J is the elastic volume ratio; i λ are the principal stretches [23]. As TPU is a high elastic and high strain material, its compression deformation is similar to rubber material [23]. Here, the Marlow criterion is selected to describe the mechanical properties of materials.…”

Section: Finite Element Modellingmentioning

confidence: 99%

See 1 more Smart Citation

A Novel Bionic Structure Inspired by Luffa Sponge and Its Cushion Properties

et al. 2020

View full text Add to dashboard Cite

The luffa sponge shows excellent cushion properties. This paper presents a bio-inspired structure of the luffa sponge. The geometry of the bionic structure was built based on the fractal theory by Python programming language and prepared by a 3D printer. Then a series of quasi-static compression tests and finite element analysis were carried out to determine the cushion properties. An optimization design was adopted to determine the best design parameter. The results showed that the influence of length (a) on specific energy absorption was more important than the degree (θ). The best parameter was found to be length less than 4 mm and angle around 11 degrees. The bionic structure of luffa sponge may show a novel perspective on natural cellular material. The findings demonstrate the great potential for designing hierarchical cellular structures and broad application prospects in the field of cushioning and energy absorption.

show abstract

“…Recently, additive manufacturing has become synonymous to fabricate complex shapes, covering all major classes of materials such as metals, [32,33] polymers, [34,35] composites, [36] and ceramics. [37,38] Subsequently, a wide range of auxetic shapes namely re-entrant, [39][40][41] chiral, [42][43][44] octagonal, [45] and rotational units [46,47] was fabricated using the different techniques of additive manufacturing technology. Specifically, electron beam melting [48][49][50][51] and selective laser melting [52][53][54][55][56] techniques were used to fabricate various metallic auxetic forms.…”

Section: Introductionmentioning

confidence: 99%

Investigation of a Novel Chiral S‐Shaped Auxetic Structure under Large Tensile Deformation

Meena

Singamneni

2020

Physica Status Solidi (b)

View full text Add to dashboard Cite

The behavior of the chiral S‐shaped structure subjected to large tensile loads in both X and Y directions is reported herein. The physical samples of stainless steel 316L are fabricated by the selective laser melting technique and experimental tests are conducted on a universal tensile testing machine. The results of tensile tests in the form of deformation patterns, tensile stress–strain curves, and Poisson's ratios are shown pictorially and graphically. The orientation of the S‐shaped structure with X‐direction loading is found to exhibit higher auxeticity over the large range of tensile loading. Nonetheless, the structure is also found auxetic when loaded from Y‐direction albeit the values of negative Poisson's ratios are not as high as of the X‐directional loading.

show abstract

Octagonal auxetic metamaterials with hyperelastic properties for large compressive deformation

Cited by 66 publications

References 61 publications

Large deformation of TPU re-entrant auxetic structures designed by TO approach

Large deformation of TPU re-entrant auxetic structures designed by TO approach

A Novel Bionic Structure Inspired by Luffa Sponge and Its Cushion Properties

Investigation of a Novel Chiral S‐Shaped Auxetic Structure under Large Tensile Deformation

Contact Info

Product

Resources

About