Application of circular and radial gratings in digital moiré method

Xia Xiao; Yilan Kang; Xiaolei Li; Zhende Hou; Haoyun Tan; Xiaoqi Li

doi:10.1117/12.839016

25 August 2009 Application of circular and radial gratings in digital moiré method

Xia Xiao, Yilan Kang, Xiaolei Li, Zhende Hou, Haoyun Tan, Xiaoqi Li

Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 73750D (2009) https://doi.org/10.1117/12.839016
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China

Abstract

Circular and radial gratings are used in digital moiré method in order to obtain in-plane displacement and strain information denoted in polar coordinate system directly. Four-step phase-shifting technique is achieved by shifting the computer-generated reference radial and circular gratings precisely. Basic procedures of this novel digital moiré method with circular and radial gratings are explained in detail by an experimental application for large deformation analysis on a double-cracked rubber disk. By using deformed gratings, radial and circular displacements distributions are measured and distributing information of strains can also be calculated. Results of the application show that the present digital moiré technique of circular and radial gratings is a valid and efficient way in measurement of both displacement and deformation for large deformation materials.

Citation Download Citation

Xia Xiao, Yilan Kang, Xiaolei Li, Zhende Hou, Haoyun Tan, and Xiaoqi Li "Application of circular and radial gratings in digital moiré method", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73750D (25 August 2009); https://doi.org/10.1117/12.839016

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KEYWORDS

Phase shifting

Phase shifts

Fringe analysis

Image processing

Mechanics

Binary data

Motion measurement

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