کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7128300 1461592 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of higher order stress terms in cracked Brazilian disc specimen under mode I loading using digital image correlation technique
ترجمه فارسی عنوان
تعیین شرایط تنش بالاتر در نمونه دیسک برزیلی ترک خورده در حالت بارگذاری من با استفاده از روش همبستگی تصویر دیجیتالی
کلمات کلیدی
همبستگی تصویر دیجیتال، دیسک برزیلی، ترک، حالت خالص من، ضرایب ویلیامز گسترش،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
چکیده انگلیسی
The digital image correlation (DIC) technique is used to calculate the coefficients of higher order terms of the Williams' expansion in the centrally-cracked Brazilian disc specimens of different crack lengths under pure mode I loading. The specimens are subjected to diametral-compression loading and the displacement field is obtained for the cracked Brazilian disc by a correlation between the undeformed and deformed images captured before and after loading. The rigid body motion and rotation of each specimen are detected and eliminated from the displacement field by using a code developed based on the Williams' series solution. Then, by employing an over-deterministic system of equations, the coefficients of higher order terms of the Williams expansion are calculated. The same specimens are then simulated using finite element method. It is shown that there is good agreement between the DIC and the finite element results. Therefore, the DIC technique can be proposed as a reliable method to experimentally obtain the mode I stress intensity factor KI, the T-stress and the coefficients of higher order terms in the Williams' series expansion.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics & Laser Technology - Volume 107, November 2018, Pages 344-352
نویسندگان
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