Compliant cellular materials with compliant porous structures: A mechanism based materials design

Kim, Kwangwon; Lee, Jae Hong; Ju, Jaehyung; Kim, Doo-Man

doi:10.1016/j.ijsolstr.2014.07.006

Cited by 16 publications

(13 citation statements)

References 20 publications

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“…Indeed, advanced orthotropic microstructures with high negative Poisson’s ratio (below −1) have been created. Some examples include, tethered nodule‒fibril models47, fiber network mats4849, compliant cellular models50, slit perforation models51, and double arrowheads52. Nevertheless, few real systems that exhibit high negative Poisson’s ratios under both tensile and compressive loads have been reported.…”

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confidence: 99%

Orthotropic Laminated Open-cell Frameworks Retaining Strong Auxeticity under Large Uniaxial Loading

Tanaka

Suga

Iwata

et al. 2017

Sci Rep

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Anisotropic materials form inside living tissue and are widely applied in engineered structures, where sophisticated structural and functional design principles are essential to employing these materials. This paper presents a candidate laminated open-cell framework, which is an anisotropic material that shows remarkable mechanical performance. Using additive manufacturing, artificial frameworks are fabricated by lamination of in-plane orthotropic microstructures made of elbowed beam and column members; this fabricated structure features orthogonal anisotropy in three-dimensional space. Uniaxial loading tests reveal strong auxeticity (high negative Poisson’s ratios) in the out-of-plane direction, which is retained reproducibly up to the nonlinear elastic region, and is equal under tensile and compressive loading. Finite element simulations support the observed auxetic behaviors for a unit cell in the periodic framework, which preserve the theoretical elastic properties of an orthogonal solid. These findings open the possibility of conceptual materials design based on geometry.

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confidence: 99%

Orthotropic Laminated Open-cell Frameworks Retaining Strong Auxeticity under Large Uniaxial Loading

Tanaka

Suga

Iwata

et al. 2017

Sci Rep

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“…The dotted blue and red lines are from Eq. (13). A numerical technique is applied to generate the constitutive curve, which is described in further detail in the Appendix A.…”

Section: Resultsmentioning

confidence: 99%

“…From the expansion mechanism of a flexure in the transverse direction for longitudinal loading, which showed a negative Poisson's ratio (NPR), they found its similarity on the deformation of the re-entrant auxetic hexagonal honeycomb. Kim et al introduced a synthesis of 2D compliant porous structures (CPSes) from regular and re-entrant auxetic honeycombs [13,14] to design compliant cellular materials (CCMs) with high positive and negative Poisson's ratios. Inspired by the synthesis of 2D CPSes, we further explore 3D CPSes by extending the concept of 2D CPSes to the deformation in the out-of-plane direction.…”

Section: Synthesis Of 3d Compliant Cellular Materials With Compliant mentioning

confidence: 99%

“…We investigated two-dimensional (2D) hexagonal honeycombs and synthesized 2D mechanical metamaterials with compliant porous structures (CPSes) having extremely high positive ($50) and negative ($À50) Poisson's ratios by combining a flexure-hinge based compliant mechanism of mesostructures [2,13,14]. In addition to the extremely high positive and negative Poisson's ratios, other mechanical properties, e.g., modulus, yield strength, and yield strain, can be tailored if the geometry of the holes and slits is properly arranged.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the extremely high positive and negative Poisson's ratios, other mechanical properties, e.g., modulus, yield strength, and yield strain, can be tailored if the geometry of the holes and slits is properly arranged. For example, a mechanical metamaterial with a CPS made of an aluminum alloy can be tailored to have a high yield strain ($25%) with a low modulus ($25 MPa), which are close values in the mechanical properties of elastomers [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Mechanical metamaterials with 3D compliant porous structures

Kim

2015

Composite Structures

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A Passive Thermal Switch with Kirigami‐Inspired Mesostructures

Heo

Bao

et al. 2019

Adv Eng Mater

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The objective of this work is to design a passive thermal switch with Kirigami-inspired architected materials composed of bilayer hinges and to analyze thermomechanical and thermal performance at the ON/OFF states based on a composition of materials and geometry of metamaterials. Analytical models are constructed to determine the thermal deformation and heat transport of the metamaterial, followed by finite element-based simulations. A two-step design approach À i) selection of multi-materials and ii) geometric modification of mesostructures provides a robust method for the design of a passive thermal switch with Kirigami-inspired metamaterials. The mesostructures designed have potential as a passive thermal switch enabling to engineer a large thermal deformation, a small thermal resistance, and a sizable thermal switch ratio. With a systematic approach, this work demonstrates that Kirigami structures with multi-materials can be potentially used for a tool of thermal transport.

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Compliant cellular materials with compliant porous structures: A mechanism based materials design

Cited by 16 publications

References 20 publications

Orthotropic Laminated Open-cell Frameworks Retaining Strong Auxeticity under Large Uniaxial Loading

Orthotropic Laminated Open-cell Frameworks Retaining Strong Auxeticity under Large Uniaxial Loading

Mechanical metamaterials with 3D compliant porous structures

A Passive Thermal Switch with Kirigami‐Inspired Mesostructures

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