کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5027540 1470635 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bentonite Saturation from Discrete Fractures - Numerical Model of Non-Uniform Swelling Over a Gap
ترجمه فارسی عنوان
اشباع بنتونیت از شکست های گسسته - مدل عددی تورم غیر یکنواخت در یک شکاف
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی

The nuclear disposal concept is based on compacted bentonite barrier placed into a borehole in the host rock. In crystalline rock, one of the issues is a non-uniform saturation of bentonite caused by inhomogeneity of the rock, typically the flow being concentrated to fractures. We solve a hydro-mechanical model problem in bentonite in the general engineering multiphysics simulation software ANSYS. The elasto-plastic transition as result of saturation is represented by a special non-linear stress-strain curve of elastic model (saturation-dependent weakening). The model is further extended to a contact-problem formulation, where the swelling is possible either as free swelling until filling the gap or as confined state after. It is a synthetic case of one horizontal fracture crossing a vertical borehole. We demonstrated that for large time period, the saturation is limited to a part of the volume, producing a non-uniform stress field in the whole volume. The stress is also controlled by the gap width.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Procedia Engineering - Volume 191, 2017, Pages 530-535
نویسندگان
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