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Related Concept Videos

Shearing Strain01:20

Shearing Strain

557
The shearing strain represents a cubic element's angular change when subjected to shearing stress. This type of stress can transform a cube into an oblique parallelepiped without influencing normal strains. The cubic element experiences a significant transformation when exposed solely to shearing stress. Its shape alters from a perfect cube into a rhomboid, clearly demonstrating the effect of shearing strain. The degree of this strain is considered positive if it reduces the angle between...
557
Three-Dimensional Analysis of Strain01:29

Three-Dimensional Analysis of Strain

273
Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
273
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity01:15

Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity

310
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
310

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Related Experiment Video

Updated: Aug 12, 2025

Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets
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NFRHT modulation between graphene/SiC core-shell and hBN plate through strain.

Kun Zhang, Bo Zhang, Jinlin Song

    Optics Letters
    |February 1, 2023
    PubMed
    Summary

    We demonstrate active control of near-field radiative heat transfer (NFRHT) using strained hexagonal boron nitride and graphene/SiC nanoparticles. This enables tunable thermal rectification for nanoscale thermal management.

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    Area of Science:

    • Nanoscale heat transfer
    • Condensed matter physics
    • Materials science

    Background:

    • Near-field radiative heat transfer (NFRHT) is crucial for thermal management.
    • Graphene/SiC core-shell (GSCS) nanoparticles and hexagonal boron nitride (hBN) exhibit unique optical properties.

    Purpose of the Study:

    • To numerically investigate NFRHT between GSCS nanoparticles and an hBN plate.
    • To explore active control of NFRHT via strain-induced tuning of hBN's hyperbolic phonon polaritons (HPPs).
    • To achieve thermal rectification using coupled HPPs and localized surface resonance (LSR).

    Main Methods:

    • Numerical simulations of NFRHT.
    • Analysis of phonon-polariton coupling.
    • Investigation of strain effects on hBN's hyperbolic modes.
    • Tuning of graphene's chemical potential.

    Main Results:

    • Strain in hBN tunes its HPPs, enabling coupling/decoupling with GSCS nanoparticle's LSR.
    • Active control of NFRHT is achieved through strain engineering.
    • A maximum thermal rectification ratio of 13.6 is predicted.
    • Graphene's chemical potential further influences NFRHT.

    Conclusions:

    • This study advances the understanding of phonon-polariton coupling mechanisms.
    • The findings facilitate dynamic thermal management at the nanoscale.
    • Strain-tunable hBN and GSCS nanoparticles offer a pathway for advanced thermal devices.