Rear-Surface Collapse of Finite Thickness Concrete Targets under Internal Explosion

Zhuo-Ping Duan; Hai-Ying Zhang; Hai-Jun Wu; Yan Liu; Zhuo-Cheng Ou; Feng-Lei Huang

doi:10.14429/dsj.62.1237

Zhuo-Ping Duan Beijing Institute of Technology, Beijing
Hai-Ying Zhang Beijing Institute of Technology, Beijing
Hai-Jun Wu Beijing Institute of Technology, Beijing
Yan Liu Beijing Institute of Technology, Beijing
Zhuo-Cheng Ou Beijing Institute of Technology, Beijing
Feng-Lei Huang Beijing Institute of Technology, Beijing

DOI: https://doi.org/10.14429/dsj.62.1237

Keywords: Internal explosion, critical collapse thickness, damage and failure, spalling, concrete target

Abstract

An experimental investigation on the buried internal explosion in finite thickness concrete targets was carried out, with the aim at developing an available criterion for the critical collapse of rear-surface to determine the critical collapse thickness and the critical amount of explosive charge under different depth of buried. It is found, under a certain density and diameter of explosive charge, the critical collapse thickness increases monotonically with the length-to-diameter ratio or the amount of the explosive charge, but the increasing becomes slower down after the length-to-diameter ratio of the explosive charge is larger than about 5, which implies that the geometry of the explosive charge can have much influence on the damage and failure of concrete targets due to different mechanism of energy dissipation. Moreover, by using the dimensional analysis approach, the function relation between the dimensionless critical collapse thickness and the length-to-diameter ratio was obtained, which shows that the dimensionless critical collapse thickness depends on both the amount and the length-to-diameter ratio of the charge.

Defence Science Journal, 2012, 62(5), pp.295-299, DOI:http://dx.doi.org/10.14429/dsj.62.1237

Author Biographies

Zhuo-Ping Duan, Beijing Institute of Technology, Beijing

Dr Zhuo-Ping Duan obtained his PhD from Beijing Institute of Technology (BIT), China, in 1994. Presently, he is Professor at State Key Laboratory of Explosion Science and Technology, BIT. His research areas are explosion damage technology and its applications.

Hai-Ying Zhang, Beijing Institute of Technology, Beijing

Ms Hai-Ying Zhang has received her Bachelor degree in Engineering Mechanics from Taiyuan University of Technology in 2007. Presently, pursuing her PhD in Engineering Mechanics from BIT, China.

Hai-Jun Wu, Beijing Institute of Technology, Beijing

Dr Hai-Jun Wu obtained his PhD from Beijing Institute of Technology (BIT), China, in 2003. He is working as an Associate Professor at State Key Laboratory of Explosion Science and Technology, BIT. His research interests are explosion & impact dynamics, dynamic behavior of materials and dynamics numerical simulation.

Yan Liu, Beijing Institute of Technology, Beijing

Dr Yan Liu obtained his PhD from Beijing Institute of Technology (BIT), China, in 2003. He is working as a Professor at State Key Laboratory of Explosion Science and Technology, BIT. His research interests are explosion mechanics, the vulnerability of targets, and damage effects.

Zhuo-Cheng Ou, Beijing Institute of Technology, Beijing

Zhuo-Cheng Ou obtained his PhD (Solid Mechanics) from Xi’an Jiaotong University (XJTU), China, in 2003. Currently working as a Professor in the State Key laboratory of Explosion Science and Technology, BIT, China. His research areas include impact dynamics of solids, dynamic fracture mechanics and fractal fracture mechanics.

Feng-Lei Huang, Beijing Institute of Technology, Beijing

Dr Feng-Lei Huang obtained his PhD from Beijing Institute of Technology (BIT), P.R. China in 1992. Presently, he is a professor at State Key Laboratory of Explosion Science and Technology, BIT and his research areas are explosion dynamics, explosion damage and explosion protection.

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