Projectile impact and penetration in loose granular bed

by: M Hou, Z Peng, R Liu, Y Wu, Y Tian, K Lu, CK Chan

Science and Technology of Advanced Materials, Vol. 6, No. 7. (October 2005), pp. 855-859.

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Abstract

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 , where [gamma] and [kappa] 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 g' 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.

@article{Hou2005_1, abstract = {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 , where [gamma] and [kappa] 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 g' 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.}, author = {Hou, M. and Peng, Z. and Liu, R. and Wu, Y. and Tian, Y. and Lu, K. and Chan, C. K. }, booktitle = {Research activities related to materials science in the Institute of Physics, the Chinese Academy of Sciences}, citeulike-article-id = {2408144}, doi = {10.1016/j.stam.2005.05.016}, journal = {Science and Technology of Advanced Materials}, keywords = {granular\_impact, qual, qualifier}, month = {October}, number = {7}, pages = {855--859}, posted-at = {2008-02-21 16:19:08}, priority = {2}, title = {Projectile impact and penetration in loose granular bed}, url = {http://dx.doi.org/10.1016/j.stam.2005.05.016}, volume = {6}, year = {2005} }

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TY - JOUR ID - Hou2005_1 L3 - citeulike-article-id:2408144 TI - Projectile impact and penetration in loose granular bed T2 - Research activities related to materials science in the Institute of Physics, the Chinese Academy of Sciences JF - Science and Technology of Advanced Materials VL - 6 IS - 7 SP - 855 EP - 859 N2 - 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 , where [gamma] and [kappa] 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 g' 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. KW - granular_impact KW - qual KW - qualifier AU - Hou, M AU - Peng, Z AU - Liu, R AU - Wu, Y AU - Tian, Y AU - Lu, K AU - Chan, CK PY - 2005/10// UR - http://dx.doi.org/10.1016/j.stam.2005.05.016 ER -

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