Theoretical analysis on the pullout behavior of carbon nanotube at cryogenic environment with the consideration of thermal residual stress

Hei Lam Ma, Kin tak Lau, David Hui, San-Qiang Shi, Chi kin Poon

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)

Abstract

It is assumed that there are no bonding between CNTs and polymer so only frictional slip occurs in the interface. Results show that the required axial stress to pull out a straight CNT at cryogenic temperature is more than 6 times greater than that required at room temperature. Some other parameters, such as the length of CNT and the modulus of polymer, also influence the stresses in the CNT/polymer model. The model is also applied to coiled carbon nanotubes (CCNTs) which are newly-developed carbon nanotubes with a helical configuration. At cryogenic temperature, a greater stress is required to pull out a CCNT than a straight CNT, especially in the case when the pitch angle of CCNT is less than 60°. Hence, the stress transfer in CCNT/polymer composites is better than that in straight CNT/polymer composites.
Original languageEnglish
Pages (from-to)67-75
Number of pages9
JournalComposites Part B: Engineering
Volume128
DOIs
Publication statusPublished - 1 Nov 2017

Keywords

  • Cryogenic
  • Fiber/matrix bond
  • Numerical analysis
  • Particle-reinforcement
  • Residual/internal stress

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this