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Experimental Mechanics

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01.07.2013 | Brief Technical Note

Full-field Measurement of Topography and Curvature by Coherent Gradient Sensing Method at High Temperature

verfasst von: X. Dong, C. Zhang, X. Feng, K.-C. Hwang

Erschienen in: Experimental Mechanics | Ausgabe 6/2013

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Abstract

Coherent gradient sensing (CGS) method, a real time, full-field optical technique, is insensitive to vibrations and able to provide slope and curvature maps and surface topographies, to investigate non-uniform deformations. In this paper, we analyze the thermal effects on the optical path in CGS due to air convection, and the influence of grating thickness and refractive index on the measurement accuracy. A modified governing equation is derived considering the grating thickness, which is demonstrated by testing a standard sample. Finally, we apply CGS method to measure the full-field deformation of a specimen at high temperature.

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Titel: Full-field Measurement of Topography and Curvature by Coherent Gradient Sensing Method at High Temperature
verfasst von: X. Dong
C. Zhang
X. Feng
K.-C. Hwang
Publikationsdatum: 01.07.2013
Verlag: Springer US
Erschienen in: Experimental Mechanics / Ausgabe 6/2013
Print ISSN: 0014-4851
Elektronische ISSN: 1741-2765
DOI: https://doi.org/10.1007/s11340-013-9713-x

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