A laseroptical strain sensor for non contact and whole field strain analysis

T. Walz

doi:10.1117/12.2316203

1 September 1996 A laseroptical strain sensor for non contact and whole field strain analysis

T. Walz

Proceedings Volume 2778, 17th Congress of the International Commission for Optics: Optics for Science and New Technology; 2778EA (1996) https://doi.org/10.1117/12.2316203
Event: 17th Congress of the International Commission for Optics: Optics for Science and New Technology, 1996, Taejon, Korea, Republic of

Abstract

A new laseroptical strain sensor is presented for application in material testing. The sensor uses the principle of speckle interferometry with dual illumination technique for measurement of the in-plane component of the deformation of samples under load. Computer evaluation of the resulting correlation fringes give quantitative data about the deformation and strain distribution on the whole surface of the sample. Therefore this technique enables the measurement even at inhomogenuous structures and components and will show local effects like yielding, creeping, shear bands, defects, and many more. Principle and practical application examples will be given in this paper.

Citation Download Citation

T. Walz "A laseroptical strain sensor for non contact and whole field strain analysis", Proc. SPIE 2778, 17th Congress of the International Commission for Optics: Optics for Science and New Technology, 2778EA (1 September 1996); https://doi.org/10.1117/12.2316203

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