کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6770422 | 1431683 | 2018 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of strain rate on the mechanical and fracturing behaviors of rock-like specimens containing two unparallel fissures under uniaxial compression
ترجمه فارسی عنوان
اثر نرخ کرنش بر رفتار مکانیکی و شکستگی نمونه های سنگی شامل دو شکاف غیرقطعی تحت فشرده سازی یک طرفه
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کلمات کلیدی
وابستگی نرخ تنزل، شکاف بی نظیر، رفتارهای مکانیکی، کلاسیک شدن روش عنصر گسسته،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی
Rocks containing unparallel fissures are likely to be subjected to dynamic loading resulting from earthquakes in various civil engineering structures. Since dynamic loading rate significantly affects the mechanical behaviors of fissured rocks, understanding the mechanical properties and fracture mechanism of fissured rocks under different loading rates is thus crucial in rock engineering applications. This study investigates the effects of strain rate on the mechanical and fracturing behaviors of rock-like specimens containing two unparallel fissures with varying inclination angles (α2). Our experimental results demonstrate that α2 and strain rate significantly affect the strength and deformation characteristics and the failure modes of fissured specimens. Both the strength and elastic modulus of the rock-like specimens highly depend on the strain rates, and the strain rate dependence is more sensitive for fissured specimen than that for the intact specimen. Under the same strain rate, the strength of fissured specimens decreases as α2 increases up to 60°, and then increases. The fissured specimens with greater α2 are characterized by higher elastic modulus. Furthermore, the fracture mechanism of the fissured specimen is numerically revealed, and the energy characteristics of fissured models are also analyzed on a micro-level.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil Dynamics and Earthquake Engineering - Volume 110, July 2018, Pages 195-211
Journal: Soil Dynamics and Earthquake Engineering - Volume 110, July 2018, Pages 195-211
نویسندگان
Peng Feng, Feng Dai, Yi Liu, Nuwen Xu, Tao Zhao,