کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6709236 1428641 2018 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Roles of model size and particle size distribution on macro-mechanical properties of Lac du Bonnet granite using flat-joint model
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Roles of model size and particle size distribution on macro-mechanical properties of Lac du Bonnet granite using flat-joint model
چکیده انگلیسی
In this study, a new calibration procedure was proposed to calibrate the micro-parameters for the flat-joint model. Both uniaxial compression and Brazilian test simulations were conducted on standard and same-porosity specimens using flat-joint model. With increasing model size, the uniaxial compression strength (UCS), crack-initiation stress, Young's modulus and Poisson's ratio decrease initially until achieving stable values, while the Brazilian tensile strength (BTS) follows the descending trend and UCS/BTS maintains increasing with increasing model size. It is found that BTS is best fitted by the fracture energy and multifractal size-effect models for which the fitting constants are functions of the grain size heterogeneity (dmax/dmin). All the macro-properties are found to decrease with increasing dmax/dmin. It is also demonstrated that the constitutive contact model affects the effects of model size and particle size distribution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers and Geotechnics - Volume 103, November 2018, Pages 43-60
نویسندگان
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