کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4743013 1641770 2016 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A linearized porous brittle damage material model with distributed frictional-cohesive faults
ترجمه فارسی عنوان
یک مدل مواد خسارت مخرب متخلخل خطی شده با گسل های توزیع اصطکاک-انسانی
کلمات کلیدی
آسیب نادرست، مدل سازی چند بعدی، گسل مجدد رسانه های متخلخل، هدایت هیدرولیکی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی


• Cohesive/frictional microstructures for hydro-mechanical behavior of confined rocks
• Microstructures assume the form of parallel faults at different levels of recursion.
• Model characterized by seven mechanical parameters: elastic, cohesive and hydraulic
• Fracture patterns optimal for the ability to relieve deviatoric stresses in rocks
• Attendant permeability enhancement computed by recourse to channel flow principles

We present a simplified model of damaging porous material, obtained through consistent linearization from a recursive-faulting material model described in (Pandolfi et al. 2016). The brittle damage material model is characterized by special planar micro-structures, consisting of nested families of equi-spaced frictional-cohesive faults in an otherwise elastic matrix material. The linear kinematics model preserves the main microstructural features of the finite kinematics one but offers a far better computational performance. Unlike models commonly employed in geo-mechanical applications, the proposed model contains a small number of parameters, to wit, two elastic moduli, three frictional-cohesive parameters, and three hydraulic response parameters, all of which having clear physical meanings and amenable to direct experimental measurement through standard material tests. The model is validated by comparison to triaxial hydro-mechanical experimental data. Despite the paucity of material constants, the salient aspects of the observed behavior are well captured by the model, qualitatively and quantitatively. As an example of application of the model, we simulate the excavation of a borehole in a rocky embankment.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Geology - Volume 215, 19 December 2016, Pages 10–24
نویسندگان
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