کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9801333 | 1515479 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Projectile impact and penetration in loose granular bed
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Projectile impact and penetration in loose granular bed Projectile impact and penetration in loose granular bed](/preview/png/9801333.png)
چکیده انگلیسی
Dynamics of a projectile impacting on a loose granular bed under the acceleration due to gravity g has been studied by fast video photograph. Granular jet formation and projectile penetration are observed in 3D and quasi-2D experiments. It is found that the penetration velocity u can be described by mdu/dt=âγuâκz+mgâ², where γ and κ are the parameters which characterize the viscous damping and hydrostatic drag forces of the bed, respectively, z is the penetration distance of the projectile, and gâ² is a modified gravity term. The viscous damping term is found important in quasi-2D experiments. For 3D, the damping term is only important at the beginning of the impact, and can be neglected during penetration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science and Technology of Advanced Materials - Volume 6, Issue 7, October 2005, Pages 855-859
Journal: Science and Technology of Advanced Materials - Volume 6, Issue 7, October 2005, Pages 855-859
نویسندگان
M. Hou, Z. Peng, R. Liu, Y. Wu, Y. Tian, K. Lu, C.K. Chan,