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Elastic modulus measured through atomic force microscopy (AFM)-based indentation on single carbon fiber (CF) is found with dependence on lateral applied stress. An in situ indentation experiment inside a high-resolution transmission electron microscope was per- formed to quantitatively understand this phenomenon by observing microstructure change in the indented area. Change of graphitic basal plane misalignment angle during indentation was linked to a continuous change of modulus with the help of finite element simulation. The established relationship between modulus and indentation force was further used to calcu- late residual stress distribution in CF imbedded in a CF reinforced polymer composite using the AFM indentation technique. The stress-induced formation of nanoscale defects in the CF and their transformation into fracture were directly characterized.

Rights:

• Creative Commons BY Attribution 4.0 International
  Creative Commons BY Attribution 4.0 International

Keyword: Atomic force microscopy, indentation

Date published: 2019-12-31

Publisher: Informa UK Limited

Journal:

• SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS (ISSN: 14686996) vol. 20 issue. 1 p. 412-420

Funding:

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1080/14686996.2019.1600202

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Updated at: 2024-01-05 22:12:51 +0900

Published on MDR: 2023-03-02 10:18:13 +0900