Real-time dual-sensitive shearography for simultaneous in-plane and out-of-plane strain measurements

Jie Dong*, Shengjia Wang, Min Lu, Martin Jakobi, Zhanwei Liu, Xingchen Dong, Franziska Pöller, Laura Maria Bilgeri, Félix Salazar Bloise, Ali K. Yetisen, Alexander Walter Koch

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)3276-3283
Number of pages8
JournalOptics Express
Volume27
Issue number3
DOIs
Publication statusPublished - 4 Feb 2019

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