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

Hareesh V. Tippur; Sridhar Krishnaswamy; Ares J. Rosakis

doi:10.1007/BF00036631

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

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

169 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 language	English (US)
Pages (from-to)	193-204
Number of pages	12
Journal	International Journal of Fracture
Volume	48
Issue number	3
DOIs	https://doi.org/10.1007/BF00036631
State	Published - Apr 1991

ASJC Scopus subject areas

Computational Mechanics
Modeling and Simulation
Mechanics of Materials

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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.",

author = "Tippur, {Hareesh V.} and Sridhar Krishnaswamy and Rosakis, {Ares J.}",

year = "1991",

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N2 - 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.

AB - 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.

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

Abstract

ASJC Scopus subject areas

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