کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8137640 | 1523548 | 2014 | 31 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impact cratering experiments into quartzite, sandstone and tuff: The effects of projectile size and target properties on spallation
ترجمه فارسی عنوان
آزمایشات کراسیتور ضربه به کوارتزیت، ماسه سنگ و توف: اثرات اندازه و خواص هدف روی خوشه
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کلمات کلیدی
آزمایشات کراکتور اثر، اسپاالیزاسیون، استحکام،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
چکیده انگلیسی
Impact cratering experiments were performed on quartzite, tuff, and dry and water-saturated sandstones in the framework of the MEMIN research unit. 2.5-12Â mm diameter projectiles were accelerated to â¼5Â km/s. Evaluation of the resulting craters shows that crater volumes and crater efficiencies of large-scale experiments are greater than predicted by strength scaling laws. A method to approximate the transient crater volume shows that this effect is largely due to an increase in spallation. Strength scaling laws are used to determine the reduction of tensile strength in large-scale experiments and show a decrease by a factor of 1.8-3.6. This strength reduction can be correlated with a decrease in strain rate for larger projectiles, and with the Weibull theory of strength reduction for larger rock sample sizes. Further variations in spallation are observed between different target materials; a decrease in spall is suggested to be controlled by increased porosity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Icarus - Volume 242, 1 November 2014, Pages 211-224
Journal: Icarus - Volume 242, 1 November 2014, Pages 211-224
نویسندگان
Michael H. Poelchau, Thomas Kenkmann, Tobias Hoerth, Frank Schäfer, Michael Rudolf, Klaus Thoma,