Characterisation of indentation-induced pattern using full-field strain measurement

Jui-Chao Kuo, S. H. Tung, M. H. Shih, Y. Y. Lu

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

In this study, digital image correlation (DIC)-based strain analysis software was successfully developed. Its strain resolution lies in the order of 2.3 × 10 -4 -3.1 × 10 -4 . Full-strain field measurement was used to study indentation-induced plastic patterns around the spherical indenter for a polycrystal and a single crystal of pure aluminium. During indentation, the pure aluminium specimen of the single crystal revealed a symmetric indentation pattern of von Mises strain. The piling-up around the residual impression was successfully and directly characterised by examining the sign of strain ε X and ε Y in the X and Y directions. However, the inward, out-of-plane movement results in an error in calculating in-plane strain referred to as a 'distortion strain' using two-dimensional DIC.

Original languageEnglish
Pages (from-to)277-282
Number of pages6
JournalStrain
Volume46
Issue number3
DOIs
Publication statusPublished - 2010 Jun 1

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

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