Influences of nanotwin volume fraction on the ballistic performance of coarse-grained metals

Q. D. Ouyang, G. J. Weng, A. K. Soh, X. Guo

Research output: Contribution to journalLetterpeer-review

3 Scopus citations


Coarse-grained (CG) metals strengthened by nanotwinned (NT) regions possess high strength and good ductility. As such, they are very suitable for applications in bullet-proof targets. Here, a numerical model based on the conventional theory of strain gradient plasticity and the Johnson–Cook failure criterion is employed to study the influences of volume fraction of NT regions on their ballistic performance. The results show that in general a relatively small twin spacing (4–10 nm) and a moderate volume fraction (7%–20%) will lead to excellent limit velocity and that the influences of volume fraction on limit displacement change with the category of impact processes.

Original languageEnglish (US)
Pages (from-to)265-268
Number of pages4
JournalTheoretical and Applied Mechanics Letters
Issue number5
StatePublished - Sep 2017

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Environmental Engineering
  • Civil and Structural Engineering
  • Biomedical Engineering
  • Aerospace Engineering
  • Ocean Engineering
  • Mechanics of Materials
  • Mechanical Engineering


  • Ballistic performance
  • Limit displacement
  • Limit velocity
  • Nanotwin
  • Volume fraction


Dive into the research topics of 'Influences of nanotwin volume fraction on the ballistic performance of coarse-grained metals'. Together they form a unique fingerprint.

Cite this