کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
277062 1430198 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The influence of crack-orientation distribution on the mechanical properties of pre-cracked brittle media
ترجمه فارسی عنوان
تأثیر توزیع ترک خوردگی بر خواص مکانیکی رسانه های شکننده قبل از ترک خورده
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی

Cracks in kerogen-rich shales and other brittle rock-like materials have a tremendous impact on their elastic properties and strength. In this paper, we investigate the effective mechanical properties of shale plates with pre-existing cracks. We employ the extended finite element method (XFEM) to investigate a pre-cracked medium with an elastic, isotropic and brittle shale matrix. We show how the mechanical properties of the orthotropic shale plates are dependent on the crack density and the standard deviation of crack angles. Both the Young's modulus and the Poisson's ratio of the cracked media exhibit a linear dependence on the standard deviation of crack angles, in contrast to the nonlinear dependence of the strength on the angle deviation. Finally, we propose mechanical models to capture the relationship between the mechanical properties and the distribution characteristics of pre-existing cracks in shales. These phenomenological models could be applied to estimate the fracking behavior of shales in engineering practice.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Solids and Structures - Volume 96, 1 October 2016, Pages 64–73
نویسندگان
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