کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
809578 1468695 2015 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A statistical meso-damage mechanical method for modeling trans-scale progressive failure process of rock
ترجمه فارسی عنوان
یک روش مکانیکی برای آسیب رسیدن به مضر برای مدلسازی فرآیند شکست پیشرونده سنگ در مقیاس بزرگ
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی


• We proposed a method to model trans-scale progressive failure process of rock.
• Laboratory-scale numerical testing to investigate the influence of different cases.
• Failure zone around the full-scale MBE tunnel model is modeled.

Starting from the concept of Representative Volume Element (RVE) at the mesoscopic scale, a statistical meso-damage mechanical method (SMDMM) is developed to model the trans-scale progressive failure process of rock, based on the statistical and continuum damage mechanics theory and the finite element method (FEM). The proposed mesoscopic constitutive law of RVE is established within the framework of elastic–brittle-damage theory in which the double damage functions correspond to a tensile and compressive damage surface. A statistical approach is employed to describe the mesoscopic heterogeneity of rock material. The damage evolution and accumulation of mesoscopic RVEs is used to reflect the macroscopic failure characteristics of rock. The global stress and strain fields are solved by the FEM. An element represents a RVE, the initiation and propagation of meso-macroscopic trans-scale cracks and their interaction are manifested by removing the failed elements. Numerical analyses are carried out on a few groups of laboratory-scale rock specimens and the effects of RVE size, material homogeneity and quasi-static loading step length are investigated. Finally, a full-scale Atomic Energy of Canada Limited (AECL) Mine-by test tunnel is simulated. The proposed SMDMM is calibrated and validated for its trans-scale modeling capability to reproduce the shape and size of excavation damage zone profile around the tunnel. Accordingly, the simulation results are compared with experimental observations and numerical results predicted by other models. It is shown that the SMDMM has good performance for modeling the rock failure process from meso- to engineering/field-scale.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Rock Mechanics and Mining Sciences - Volume 74, February 2015, Pages 133–150
نویسندگان
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