کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
734751 1461716 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Unstructured finite element-based digital image correlation with enhanced management of quadrature and lens distortions
ترجمه فارسی عنوان
همبستگی تصویر دیجیتال مبتنی بر عنصر محدود با مدیریت غیرمستقیم از اعوجاج های چهارگانه و لنز بدون ساختار
کلمات کلیدی
همبستگی تصویر دیجیتال، المان محدود، اعوجاج، پین سوراخ
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
چکیده انگلیسی


• We propose a new formulation for 2D FE-DIC.
• A quadrature scheme is proposed which outperforms the standard pixel wise integration.
• Lens distortion can be taken into account very conveniently and efficiently.

Like subset-based methods, the very first finite element versions of digital image correlation were closely related to the regular structure of images, as they were based on regular quadrilateral elements corresponding to an integer number of pixels. The use of unstructured meshes, to exploit the full potential of FE-DIC in structural mechanics, is now widespread. Most of the time, the formulation, the quadrature and the definition of the region of interest still rely on the pixels grid. In this paper, a formulation in the physical coordinate system and not in the image frame is proposed for 2D digital image correlation. In addition to a more precise definition of the region of interest, it allows the use of a more accurate quadrature rule. It is also shown that lens distortions can be successfully taken into account directly with such a formalism.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics and Lasers in Engineering - Volume 77, February 2016, Pages 44–53
نویسندگان
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