کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1635570 | 1516943 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Strength characteristics of dry and saturated rock at different strain rates
ترجمه فارسی عنوان
ویژگی های مقاومت سنگ های خشک و اشباع در نرخ تنش های مختلف
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کلمات کلیدی
سنگ، استحکام، نرخ فشار، سنگ اشباع،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
چکیده انگلیسی
The strength of rock materials is largely affected by water and loading conditions, but there are few studies on mechanical properties of saturated rocks at high strain rates. Through compressive tests on dry and saturated sandstone specimens, it was found that the dynamic compressive strength of both dry and saturated sandstone specimens increased with the increase of strain rates. The saturated rock specimens showed stronger rate dependence than the dry ones. The water affecting factor (WAF), as the ratio of the strength under dry state to that under saturated state, was introduced to describe the influence of water on the compressive strength at different strain rates. The WAF under static load was close to 1.38, and decreased with the increase of strain rate. When the strain rate reached 190 sâ1, the WAF reduced to 0.98. It indicates that the compressive strength of saturated specimens can be higher than that of dry ones when the strain rate is high enough. Furthermore, the dual effects of water and strain rate on the strength of rock were discussed based on sliding crack model, which provided a good explanation for the experimental results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 26, Issue 7, July 2016, Pages 1919-1925
Journal: Transactions of Nonferrous Metals Society of China - Volume 26, Issue 7, July 2016, Pages 1919-1925
نویسندگان
Zi-long ZHOU, Xin CAI, Yuan ZHAO, Lu CHEN, Cheng XIONG, Xi-bing LI,