Mechanical metamaterials with 3D compliant porous structures

Kim, Kwangwon; Ju, Jaehyung

doi:10.1016/j.compstruct.2015.06.060

Cited by 24 publications

(9 citation statements)

References 24 publications

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“…So far, most of the research has been carried out on microscale cellular materials which has been described in previous sections. Another approach of developing functional auxetic materials is a mechanism-based material design as highlighted in the works of Kim [68,69] and Lee. [70] Based on the inspiration from re-entrant structures, compliant mechanisms were designed which show auxetic response on meso-scale.…”

Section: Auxetic Response From Mesoscale Compliant Mechanismsmentioning

confidence: 99%

Three Decades of Auxetics Research − Materials with Negative Poisson's Ratio: A Review

2016

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Material properties can be tailored through modification of their geometry or architecture. With this concept, a lot of smart materials, metamaterials, and smart structures have been developed. Auxetic materials and structures are a novel class of materials which exhibit an interesting property of negative Poisson's ratio. By virtue of the auxetic behavior, mechanical properties such as fracture toughness, indentation resistance, etc., can be improved. In order to exploit the interesting properties of auxetic materials, several potential applications of auxetic materials have been explored in medical, sports, automobile, defense, etc. Design and modeling of novel auxetic materials and structures is still on the way. Here, the article focuses upon the different aspects of auxetic materials and structures. A comprehensive updated review of auxetic materials, their types and properties, and applications has been presented. This paper also discusses the design and modeling approaches of auxetic structures.

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Section: Auxetic Response From Mesoscale Compliant Mechanismsmentioning

confidence: 99%

Three Decades of Auxetics Research − Materials with Negative Poisson's Ratio: A Review

2016

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“…Combining lattice structures with compliant mechanisms, we developed CPS having holes and slits [37][38][39][40]; we have investigated the CPS's mechanical performance-e.g., stiffness, flexibility, and Poisson's ratios. One of the advantages of CPS design is on a capability to decompose lattice materials with structures and mechanisms, which has an excellent opportunity for materials design.…”

Section: Thermomechanical Constitutive Modelingmentioning

confidence: 99%

“…We have constructed the constitutive models of compliant porous structures for a uniaxial mechanical loading with a single material hinge in our previous work [37][38][39][40]. We further modify the constitutive equations of CPS with multilayered hinges for a thermomechanical loading.…”

Section: Thermomechanical Constitutive Modelingmentioning

confidence: 99%

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Thermomechanically Tunable Elastic Metamaterials With Compliant Porous Structures

Heo

Kim

Tessema³

et al. 2017

J. Eng. Mater. Technol

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Adding programmable function to elastic metamaterials makes them versatile and intelligent. The objective of this study is to design and demonstrate thermomechanically tunable metamaterials with a compliant porous structure (CPS) and to analyze their thermomechanical behaviors. CPS, the unit cell of the metamaterial, is composed of rectangular holes, slits, and bimaterial hinges. By decomposing kinematic rotation of a linked arm and elastic deformation of a bimaterial hinge, a thermomechanical constitutive model of CPS is constructed, and the constitutive model is extended to a threedimensional (3D) polyhedron structure for securing isotropic thermal properties. Temperature-dependent properties of base materials are implemented to the analytical model. The analytical model is verified with finite element (FE) based numerical simulations. A controllable range of temperature and strain is identified that is associated with a thermal deformation of the bimaterial hinge and contact on the slit surfaces of CPS. We also investigate the effect of geometry of CPS on the thermal expansion and effective stiffness of the metamaterial. The metamaterial with CPS has multiple transformation modes in response to temperature while keeping the same mechanical properties at room temperature, such as effective moduli and Poisson's ratios. This work will pave the road toward the design of programmable metamaterials with both mechanically and thermally tunable capability, providing unique thermomechanical properties with a programmable function.

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“…The main parameters were analysed and verified by finite element method, and researchers studied the outflow field of non-pneumatic tires with contact surfaces and radial stiffness [10] to [12]. Wang et al [13] and [14] presented a reducedorder compensation scheme for computing the static deformation response of a thick ring supported by a unilateral elastic foundation to an arbitrarily applied force.…”

Section: Introductionmentioning

confidence: 99%

Studying the Fatigue Life of a Non-pneumatic Wheel by Using Finite-Life Design for Life Prediction

Xiao

Zhao

Lin

et al. 2018

SV-JME

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Mechanical metamaterials with 3D compliant porous structures

Cited by 24 publications

References 24 publications

Three Decades of Auxetics Research − Materials with Negative Poisson's Ratio: A Review

Three Decades of Auxetics Research − Materials with Negative Poisson's Ratio: A Review

Thermomechanically Tunable Elastic Metamaterials With Compliant Porous Structures

Studying the Fatigue Life of a Non-pneumatic Wheel by Using Finite-Life Design for Life Prediction

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