A coherent gradient sensor for crack tip deformation measurements: analysis and experimental results
1991; Springer Science+Business Media; Volume: 48; Issue: 3 Linguagem: Inglês
10.1007/bf00036631
ISSN1573-2673
AutoresHareesh V. Tippur, Sridhar Krishnaswamy, Ares J. Rosakis,
Tópico(s)Numerical methods in engineering
ResumoA 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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