On the application of the optical method of caustics to the investigation of transient elastodynamic crack problems: Limitations of the classical interpretation

Ares J. Rosakis*, Sridhar Krishnaswamy, Hareesh V. Tippur

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Several possible sources of inaccuracy that occur in the classical interpretation of caustics patterns generated during transient crack growth in elastic materials are examined using a 'Bifocal Caustics' set-up and a new full field optical technique called 'Coherent Gradient Sensing'. During unsteady dynamic crack growth, strict KdI-dominance is generally absent, especially at times close to crack initiation and arrest, even in regions outside the crack-tip 3-D zone where plane stress conditions persist. In such cases a truly transient higher order expansion is found to be essential for correctly describing stress fields outside the 3-D zone.

Original languageEnglish (US)
Pages (from-to)183-210
Number of pages28
JournalOptics and Lasers in Engineering
Volume13
Issue number3-4
DOIs
StatePublished - 1990

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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