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Proceedings Paper

New digital-image correlation method and its application
Author(s): Dongmei Xing; Hong-Qi Li; Zhi Wang; Jingwei Tong; Shibin Wang
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Paper Abstract

In this paper, a new digital-image correlation method-twelve variables gradient method is presented. The influence of second derivative terms of displacement is considered, the directional derivatives of correlation coefficient are obtained and variational step-length search is used in this method. Consequently, the truncation error caused by increasing of subset size and vast computation time are avoided. The measurement precision of displacement and strain are less than 0.011 pixels and 100 (mu) (epsilon) , respectively. Two test experiments and the application show that this is an efficient and accurate method.

Paper Details

Date Published: 29 May 2002
PDF: 4 pages
Proc. SPIE 4537, Third International Conference on Experimental Mechanics, (29 May 2002); doi: 10.1117/12.468870
Show Author Affiliations
Dongmei Xing, Tianjin Univ. (China)
Hong-Qi Li, Tianjin Univ. (China)
Zhi Wang, Tianjin Univ. (China)
Jingwei Tong, Tianjin Univ. (China)
Shibin Wang, Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 4537:
Third International Conference on Experimental Mechanics

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