کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11016550 | 1775143 | 2018 | 61 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A thermodynamics-based model for brittle to ductile behaviour and localised failure of porous rocks
ترجمه فارسی عنوان
یک مدل مبتنی بر ترمودینامیک برای رفتار شکننده به مجسمه و شکست متناوب سنگ های متخلخل
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کلمات کلیدی
ترمودینامیک، خسارت، پلاستیک سنگهای متخلخل تند و تلخ، بومی سازی،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
This study presents the development of a thermodynamics-based constitutive model for describing the macro-mechanical behaviour of porous rocks. The model formulation is developed within the well-established framework of generalised thermodynamics, or thermodynamics with internal variables (TIV), in order to guarantee the thermodynamics admissibility of the results. A new way for coupling different mechanisms of energy dissipation is proposed within the framework of TIV, so that the essential aspects of macro-mechanical behaviour of porous rocks ranging from brittle to ductile, dilation and compaction, as well as various modes of localised failure, under shearing at a wide range of confining pressures are correctly captured. The pressure sensitive behaviour of porous rocks is captured by introducing a shift stress in the formulation of the yield function, through the concept of 'frozen elastic energy' or non-dissipative part of the plastic work, which is stored within the material during loading. The proposed model allows the investigation of several important aspects of macro-mechanical behaviour of porous rocks at both material and specimen levels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Solids and Structures - Volumes 152â153, November 2018, Pages 161-184
Journal: International Journal of Solids and Structures - Volumes 152â153, November 2018, Pages 161-184
نویسندگان
Arash Mir, Giang D. Nguyen, Abdul Hamid Sheikh,