Open AccessReal-time dual-sensitive shearography for simultaneous in-plane and out-of-plane strain measurements
Author(s) -
Jie Dong,
Shengjia Wang,
Min Lü,
Martin Jakobi,
Zhanwei Liu,
Xingchen Dong,
Franziska Pöller,
Laura Maria Bilgeri,
Félix Salazar Bloise,
Ali K. Yetisen,
Alexander W. Koch
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.003276
Subject(s) - shearography , optics , shearing (physics) , interferometry , materials science , shearing interferometer , spatial filter , moiré pattern , fourier transform , spatial frequency , deformation (meteorology) , astronomical interferometer , physics , quantum mechanics , composite material
A real-time, dual-sensitive shearography system using a single-wavelength laser was developed for simultaneous and dynamic in-plane and out-of-plane strain measurements. The shearography system is capable of measuring crack-tip deformation fields quantitatively. A spatial multiplexing technique based on Fourier transform is employed for simultaneous and dynamic multi-component phase retrieval. Two slit spatial filters and a common-path shearing interferometer are used to obtain an improved phase quality for crack-tip deformation measurements. Mode-I fracture experiments under three-point bending were conducted to validate the feasibility and the capability of this method.