Inert strength of subthreshold and post-threshold vickers indentations on fused silica optical fibres

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The strength of Vickers indentations made in air on fused silica optical fibres has been studied with indentation loads in the range 5mN-20N which spans the threshold region for radial crack formation. Handling and strength-testing techniques are described which permit measurements to be made in this strength range that is intermediate between ‘pristine’ and post-threshold. The results of inert strength measurements (i.e. made in liquid nitrogen) are compared with existing models for the behaviour of subthreshold and postthreshold indentations and reasonable agreement is found between experiment and theory if it is assumed that the true threshold (i.e. for indentations performed in an inert environment) is substantially higher than observed for indents made in air. The experimental results are somewhat stronger than previously published data and this is at least partially attributed to the latter not employing a completely inert test environment.

Original languageEnglish (US)
Pages (from-to)1235-1244
Number of pages10
JournalPhilosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Volume74
Issue number5
DOIs
StatePublished - Nov 1996

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Metals and Alloys

Fingerprint Dive into the research topics of 'Inert strength of subthreshold and post-threshold vickers indentations on fused silica optical fibres'. Together they form a unique fingerprint.

Cite this