کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8906488 | 1634413 | 2018 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Measurement of sliding velocity on ice, as a function of temperature, runner load and roughness, in a skeleton push-start facility
ترجمه فارسی عنوان
اندازه گیری سرعت کششی بر روی یخ، به عنوان تابعی از درجه حرارت، بار دونده و زبری، در یک مرکز اسکلت فشار دادن
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
یخ اصطکاک، سرعت کشویی، ضریب اصطکاک، روش آزمون، روانکاری
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی
The sliding velocity on ice, as opposed to coefficient of friction measurements, is proposed to show the effect of experimental conditions on the sliding velocity. A sled was positioned with one runner in a groove and the other on flat ice and then released to slide 25â¯m down an ice track. The sliding velocity was calculated from 20 repeat experiments using runners with a different roughness (polished vs abraded) under different loads (30â¯kg, 40â¯kg and 50â¯kg) and at a range of air temperatures (â15â¯Â°C, â10â¯Â°C, â2â¯Â°C, 0â¯Â°C and 2â¯Â°C). The error in sliding velocity was sufficiently small (0.15%) to clearly show the effect of different parameters, and allowed trends to be identified. Sliding velocity was mostly influenced by a change in temperature, then by a change in load, and then the runner roughness. The highest speed was recorded at 0â¯Â°C, when the roughness and intermediate loads played a larger effect on the sliding velocity. The results are discussed in reference to solid friction, movement over a water film, and the mechanical properties of the ice. Measuring the sliding velocity, with a controlled release mechanism on the sled obviates the operator related error, and also provides a good insight on the influence of different conditions, instead of measuring the ice friction and making predictions of the acceleration and the resulting sliding velocity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cold Regions Science and Technology - Volume 151, July 2018, Pages 260-266
Journal: Cold Regions Science and Technology - Volume 151, July 2018, Pages 260-266
نویسندگان
Ernests Jansons, Janis Lungevics, Klavs Stiprais, Liene Pluduma, Karlis Agris Gross,