کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5779445 1634428 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of temperature and strain rate on mechanical characteristics and constitutive model of frozen Helin loess
ترجمه فارسی عنوان
تاثیر درجه حرارت و میزان فشار بر ویژگی های مکانیکی و مدل سازنده هلین لیس یخ زده
کلمات کلیدی
یخ زده هلین لس، فشرده سازی یک جانبه، فشار استرس، استحکام، مدول الاستیک
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی
To investigate the effect of temperature and strain rate on the mechanical properties of frozen loess, a series of uniaxial compressive tests were conducted on saturated frozen Helin loess under five different strain rates (1 × 10− 2/s, 1 × 10− 3/s, 1 × 10− 4/s, 5 × 10− 5/s, and 1 × 10− 5/s) and at four different temperatures (− 2 °C, − 4 °C, − 5 °C, and − 7 °C). From the stress-strain curves under different testing condition, the stain-softening behavior is observed and the yield point can be obviously seen. The yield stress and strength increase linearly with the decrease of temperature and increase exponentially with the increase of strain rate. The initial tangent modulus and the secant modulus corresponding to half the strength are taken to describe the stiffness of frozen loess. And the effects of temperature and strain rate on the tangent and secant modulus are analyzed. Furthermore, an elasto-plastic constitutive model considering the effects of temperature and strain rate has been proposed to describe the strength and deformation behavior of frozen Helin loess.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cold Regions Science and Technology - Volume 136, April 2017, Pages 44-51
نویسندگان
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