Probing buckling and post-buckling deformation of hollow amorphous carbon nanospheres: In-situ experiment and theoretical analysis

Weizhu Yang, Jia Yang, Yize Dong, Shimin Mao, Zongzhan Gao, Zhufeng Yue, Shen J. Dillon, Hangxun Xu, Baoxing Xu

Research output: Contribution to journalArticle

Abstract

Amorphous carbon probably is the most-known and widely used carbon allotrope. However, unlike crystalline carbon such as graphene or carbon nanotubes, amorphous carbon generally is brittle and unable to sustain large mechanical deformation due to the inherent lack of long-rang order. In this work, we demonstrate a significant delay of failure on an amorphous carbon hollow nanosphere due to the buckling and post-buckling deformation of the spherical shell. Both in situ experiments and finite element analyses are conducted to probe deformation mechanism of buckling and post-buckling, suggesting a strong dependence of the shell thickness on the buckling process. A unified deformation energy-based mechanics model is developed to extract the critical buckling and post-buckling force, and shows good agreement with in situ experiments and finite element analyses. Extension of the model to inhomogeneous hollow nanospheres is also discussed and confirmed with finite element analyses.

Original languageEnglish (US)
Pages (from-to)411-418
Number of pages8
JournalCarbon
Volume137
DOIs
StatePublished - Oct 2018

Keywords

  • Buckling
  • Deformation energy
  • Finite element analysis
  • Hollow carbon nanosphere
  • In situ experiment
  • Inhomogeneous nanosphere
  • Post-buckling

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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