第 1 部 (21) デジタル画像相関法による変位測定とその標準化について

概要

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Studies on digital image correlation technique, which can obtain the deformation of a surface by comparison of digital images of the undeformed and deformed configurations, are presented in the paper. Since this technique does not need a complicated optical system, the measurement can be performed easily. In addition, unlike other methods which utilize the interference of light waves, phase analysis of the fringe pattern and subsequent phase unwrapping process are not required. Thus, applications of this method to various problems can be expected. The displacement field measurement around a crack tip in a viscoelastic strip, and the determination of mixed-mode stress intensity factor by digital image correlation are demonstrated in the present paper. In addition, the accuracy improvement by use of colored random pattern is studied. In final, the activity of the standardization by VAMAS TWA26 is reported.
一般社団法人日本機械学会の論文
2003-03-27