Source 1primary paper2026MED
Toolkit/tubular mechanical metamaterial with sign-switchable Poisson's ratio
tubular mechanical metamaterial with sign-switchable Poisson's ratio
Taxonomy: Mechanism Branch / Architecture. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
This study introduces a novel tubular mechanical metamaterial featuring a sign-switchable Poisson's ratio and tunable mechanical properties, achieved by integrating hexagonal unit cells with positive Poisson's ratio and re-entrant unit cells with negative Poisson's ratio.
Usefulness & Problems
Why this is useful
This engineered tubular metamaterial combines positive- and negative-Poisson-ratio unit cells to produce sign-switchable Poisson-ratio behavior and tunable mechanical properties. The abstract frames it as a candidate structure for intestinal stents.; intestinal stent design; tunable mechanical performance in tubular implants
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This engineered tubular metamaterial combines positive- and negative-Poisson-ratio unit cells to produce sign-switchable Poisson-ratio behavior and tunable mechanical properties. The abstract frames it as a candidate structure for intestinal stents.
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intestinal stent design
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tunable mechanical performance in tubular implants
Problem solved
It is intended to address limitations of current intestinal stents by providing flexibility, radial strength, and adaptability under dynamic in-body conditions.; addresses the need for stents that are flexible, radially strong, and adaptable to dynamic bodily conditions
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It is intended to address limitations of current intestinal stents by providing flexibility, radial strength, and adaptability under dynamic in-body conditions.
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addresses the need for stents that are flexible, radially strong, and adaptable to dynamic bodily conditions
Problem links
addresses the need for stents that are flexible, radially strong, and adaptable to dynamic bodily conditions
LiteratureIt is intended to address limitations of current intestinal stents by providing flexibility, radial strength, and adaptability under dynamic in-body conditions.
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It is intended to address limitations of current intestinal stents by providing flexibility, radial strength, and adaptability under dynamic in-body conditions.
Taxonomy & Function
Primary hierarchy
Mechanism Branch
Architecture: A reusable architecture pattern for arranging parts into an engineered system.
Mechanisms
auxetic deformation under tensile loadinggeometry-encoded sign-switching of poisson's ratioself-contact between triangular struts during compressionTechniques
Computational DesignTarget processes
recombinationImplementation Constraints
cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationoperating role: regulator
Its design requires a tubular architecture integrating hexagonal unit cells, re-entrant unit cells, and control of the geometric gap between horizontal struts in concave unit cells. The abstract also reports evaluation by uniaxial compression testing and finite element analysis.; requires integration of hexagonal and re-entrant unit cells; mechanical tuning depends on the geometric gap between horizontal struts in concave unit cells
Independent follow-up evidence is still limited. Validation breadth across biological contexts is still narrow. Independent reuse still looks limited, so the evidence base may be fragile. No canonical validation observations are stored yet, so context-specific performance remains under-specified.
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Supporting Sources
Ranked Claims
The metamaterial demonstrates superior energy absorption and tunable stiffness, making it a promising candidate for intestinal stent applications.
The paper introduces a tubular mechanical metamaterial for intestinal stents with a sign-switchable Poisson's ratio and tunable mechanical properties.
Increasing the geometric gap between horizontal struts in concave unit cells delays the onset of sign-switching during compression while minimally affecting the tensile response.
Across all configurations, the structure shows a negative Poisson's ratio under tensile loading.
Under compression, the structure's Poisson's ratio transitions from negative to positive due to self-contact between triangular struts.
The sign-switchable tubular metamaterial is achieved by integrating hexagonal unit cells with positive Poisson's ratio and re-entrant unit cells with negative Poisson's ratio.
Stiffness, yield strength, and energy absorption capacity are highly adjustable through geometric control in the metamaterial design.
Approval Evidence
1 source7 linked approval claimsfirst-pass slug tubular-mechanical-metamaterial-with-sign-switchable-poisson-s-ratio
This study introduces a novel tubular mechanical metamaterial featuring a sign-switchable Poisson's ratio and tunable mechanical properties, achieved by integrating hexagonal unit cells with positive Poisson's ratio and re-entrant unit cells with negative Poisson's ratio.
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application potentialsupports
The metamaterial demonstrates superior energy absorption and tunable stiffness, making it a promising candidate for intestinal stent applications.
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design introductionsupports
The paper introduces a tubular mechanical metamaterial for intestinal stents with a sign-switchable Poisson's ratio and tunable mechanical properties.
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design rulesupports
Increasing the geometric gap between horizontal struts in concave unit cells delays the onset of sign-switching during compression while minimally affecting the tensile response.
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mechanical behaviorsupports
Across all configurations, the structure shows a negative Poisson's ratio under tensile loading.
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mechanical behaviorsupports
Under compression, the structure's Poisson's ratio transitions from negative to positive due to self-contact between triangular struts.
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mechanismsupports
The sign-switchable tubular metamaterial is achieved by integrating hexagonal unit cells with positive Poisson's ratio and re-entrant unit cells with negative Poisson's ratio.
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property tunabilitysupports
Stiffness, yield strength, and energy absorption capacity are highly adjustable through geometric control in the metamaterial design.
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Comparisons
Source-stated alternatives
The abstract contrasts this design with rigid metal stents and biopolymer alternatives that degrade prematurely.
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The abstract contrasts this design with rigid metal stents and biopolymer alternatives that degrade prematurely.
Source-backed strengths
sign-switchable Poisson's ratio; tunable stiffness; superior energy absorption
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sign-switchable Poisson's ratio
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tunable stiffness
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superior energy absorption
tubular mechanical metamaterial with sign-switchable Poisson's ratio and cell-specific receptor subtype gene deletion mouse models address a similar problem space because they share recombination.
Shared frame: same top-level item type; shared target processes: recombination
Strengths here: looks easier to implement in practice.
tubular mechanical metamaterial with sign-switchable Poisson's ratio and CheRiff + jRCaMP1b + RH237 cardiac all-optical electrophysiology platform address a similar problem space because they share recombination.
Shared frame: same top-level item type; shared target processes: recombination
Strengths here: looks easier to implement in practice.
Compared with eNpHR
tubular mechanical metamaterial with sign-switchable Poisson's ratio and eNpHR address a similar problem space because they share recombination.
Shared frame: same top-level item type; shared target processes: recombination
Strengths here: looks easier to implement in practice; may avoid an exogenous cofactor requirement.
Ranked Citations
- 1.