کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
277335 1430221 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A micromechanical analysis of the fracture properties of saturated porous media
ترجمه فارسی عنوان
تجزیه و تحلیل میکرومکانیکی خواص شکست در رسانه متخلخل اشباع شده
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی

A two-dimensional single edge crack problem is employed to investigate the fracture behavior of saturated poroelastic media. The media are mimicked by a micromechanical model consisting of elastic matrix and square arrays of voids with prescribed uniform pore pressure. Finite element method is used to simulate the fracture responses of the model subject to remote stress and pore pressure loading. The stress extrapolation method is extended for the porous media to calculate the nominal stress intensity factor (SIF) from the crack tip stress field. By adopting the tensile strength criterion and assuming either brittle or ductile failure of the constituent solid skeleton of the porous media, lower and upper bounds of the fracture toughness are obtained. Theoretical expressions for the stress intensity factor and the toughness are derived, agreeing well with numerical results. The effects of the arrangement of pores and the non-uniform pore pressure on the cracking of porous media are discussed and are found to only have moderate effects on the obtained results.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Solids and Structures - Volume 63, 15 June 2015, Pages 32–38
نویسندگان
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