Stress concentrations in nanoscale defective graphene
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 def...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2017-11-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.4996387 |
| _version_ | 1818935718914818048 |
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| author | Congwei Wang Junzhong Wang Asa H. Barber |
| author_facet | Congwei Wang Junzhong Wang Asa H. Barber |
| author_sort | Congwei Wang |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-20T05:24:38Z |
| format | Article |
| id | doaj.art-279c298320474e788ab70af2bd5cfdd5 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-20T05:24:38Z |
| publishDate | 2017-11-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-279c298320474e788ab70af2bd5cfdd52022-12-21T19:51:55ZengAIP Publishing LLCAIP Advances2158-32262017-11-01711115001115001-610.1063/1.4996387053710ADVStress concentrations in nanoscale defective grapheneCongwei Wang0Junzhong Wang1Asa H. Barber2CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. ChinaCAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. ChinaSchool of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, U.K.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.http://dx.doi.org/10.1063/1.4996387 |
| spellingShingle | Congwei Wang Junzhong Wang Asa H. Barber Stress concentrations in nanoscale defective graphene AIP Advances |
| title | Stress concentrations in nanoscale defective graphene |
| title_full | Stress concentrations in nanoscale defective graphene |
| title_fullStr | Stress concentrations in nanoscale defective graphene |
| title_full_unstemmed | Stress concentrations in nanoscale defective graphene |
| title_short | Stress concentrations in nanoscale defective graphene |
| title_sort | stress concentrations in nanoscale defective graphene |
| url | http://dx.doi.org/10.1063/1.4996387 |
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