A coherent gradient sensor for crack tip deformation measurements: analysis and experimental results

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

*Corresponding author for this work

Research output: Contribution to journalArticle

148 Scopus citations

Abstract

A first order diffraction analysis of an optical interferometer, Coherent Gradient Sensor (CGS), for measuring surface gradients is presented. Its applicability in the field of fracture mechanics is demonstrated by quantitatively measuring the gradients of out-of-plane displacements around a crack tip in a three point bent fracture specimen under static loading. This method has potential for the study of deformation fields near a quasi-statically or dynamically growing crack.

Original languageEnglish (US)
Pages (from-to)193-204
Number of pages12
JournalInternational Journal of Fracture
Volume48
Issue number3
DOIs
StatePublished - Apr 1 1991

ASJC Scopus subject areas

  • Computational Mechanics
  • Modeling and Simulation
  • Mechanics of Materials

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