کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
746719 894473 2008 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Use of rigid-body motion for the investigation and estimation of the measurement errors related to digital image correlation technique
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Use of rigid-body motion for the investigation and estimation of the measurement errors related to digital image correlation technique
چکیده انگلیسی

The aim of this work is to investigate the sources of errors related to digital image correlation (DIC) technique applied to strain measurements. The knowledge of such information is important before the measured kinematic fields can be exploited. After recalling the principle of DIC, some sources of errors related to this technique are listed. Both numerical and experimental tests, based on rigid-body motion, are proposed. These tests are simple and easy-to-implement. They permit to quickly assess the errors related to lighting, the optical lens (distortion), the CCD sensor, the out-of-plane displacement, the speckle pattern, the grid pitch, the size of the subset and the correlation algorithm. The errors sources that cannot be uncoupled were estimated by amplifying their contribution to the global error. The obtained results permit to address a classification of the error related to the used equipment. The paper ends by some suggestions proposed in order to minimize the errors.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics and Lasers in Engineering - Volume 46, Issue 2, February 2008, Pages 185–196
نویسندگان
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