کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4963846 | 1447411 | 2017 | 48 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Non-local formulation for transport and damage in porous media
ترجمه فارسی عنوان
فرمول بندی غیر محلی برای حمل و نقل و آسیب در رسانه متخلخل
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کلمات کلیدی
زوال کشش، آسیب غیر محلی، شیب، حمل و نقل غیر محلی، شکستگی هیدرولیکی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
نرم افزارهای علوم کامپیوتر
چکیده انگلیسی
We present a novel damage-poroelastic model for analyzing the failure response of porous media in geomechanics applications. In this new approach, a gradient non-local permeability that leads to non-local transport and consequently non local damage, is introduced. Damage evolution is a function of an equivalent strain measure that is computed from non-local permeability using an inverse permeability-strain constitutive relation. A monolithic, mixed finite element method is proposed to solve the coupled system with a displacement-pressure-regularized permeability (uâpâκÌ) element formulation. The system is linearized and solved using Newton's method and a backward Euler scheme is used to evolve the system in time. A consistent Jacobian matrix and residual vector are derived analytically and a bilinear damage model is used to evolve the damage. Numerical examples considering hydraulic fracture problems in 1-d and 2-d and damage enhanced consolidation are presented and discussed. The proposed non-local model results are compared with local damage-permeability models. While the local models are shown to suffer from mesh dependence and non-physical spurious oscillations in strain, permeability and fluid pressure evolution, the proposed model is reliable and seems to overcome all these limitations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 324, 1 September 2017, Pages 654-688
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 324, 1 September 2017, Pages 654-688
نویسندگان
Mostafa E. Mobasher, Luc Berger-Vergiat, Haim Waisman,