期刊
MEASUREMENT SCIENCE AND TECHNOLOGY
卷 23, 期 12, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/0957-0233/23/12/125603
关键词
stereo digital image correlation; high temperature; displacement measurement; strain measurement
资金
- US Air Force SBIR/STTR
This paper describes full-field, three-dimensional, non-contact measurements of displacement and strain under high temperature condition based on digital image correlation (DIC). To conduct DIC measurements at high temperatures, two important factors need to be considered: (1) the ability of the coating to resist heat and withstand deformation without cracking or peeling off; (2) the radiation from the specimen's surface at high temperature. This paper proposes a solution to both of the most important issues in high temperature DIC measurement. First, different coating materials were investigated, and a procedure to generate a necessary speckle pattern required by DIC to resist heat and withstand deformation at high temperature has been developed. Second, a monochromatic illumination system in combination with a filter set has been studied to eliminate the radiation effect. A DIC system which enables a high temperature displacement and strain measurement up to 1100 degrees C is presented and demonstrated by experimental measurements.
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