Stress concentrations in nanoscale defective graphene

Congwei Wang, Junzhong Wang, Asa Barber

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    Abstract

    Defect-free graphene nanosheets are the strongest material known but manufactured graphene tends to contain flaws of different forms and dimensions, leading to the degradation of mechanical performance. Here we report a quantitative mechanical approach to quantitatively evaluate the influence of defects within exfoliated pristine graphene sheets. Results indicate stress concentrations around defects within graphene sheets that lower strength. The description of stress concentration broadly follows a Griffith strength approach for continuum materials, despite the non-continuum structure of graphene, but has little impact on the Young’s modulus.
    Original languageEnglish
    Article number115001
    JournalAIP Advances
    Volume7
    Issue number11
    Early online date1 Nov 2017
    DOIs
    Publication statusPublished - Nov 2017

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