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

Defence Science Journal

Yan Liu¹  Hai-Ying Zhang¹  Hai-Jun Wu¹  Zhuo-Cheng Ou¹  Feng-Lei Huang¹  Zhuo-Ping Duan¹ 

[1] Beijing Institute of Technology, Beijing

关键词: Internal explosion;    critical collapse thickness;    damage and failure;    spalling;    concrete target;   

DOI  :  

学科分类：社会科学、人文和艺术（综合）

来源: Defence Scientific Information & Documentation Centre

【 摘 要 】

An experimental investigation on the buried internal explosion in finitethickness concrete targets was carried out, with the aim at developingan available criterion for the critical collapse of rear-surface todetermine the critical collapse thickness and the critical amount ofexplosive charge under different depth of buried. It is found, under acertain density and diameter of explosive charge, the critical collapsethickness increases monotonically with the length-to-diameter ratio orthe amount of the explosive charge, but the increasing becomes slowerdown after the length-to-diameter ratio of the explosive charge islarger than about 5, which implies that the geometry of the explosivecharge can have much influence on the damage and failure of concretetargets due to different mechanism of energy dissipation. Moreover, byusing the dimensional analysis approach, the function relation betweenthe dimensionless critical collapse thickness and the length-to-diameterratio was obtained, which shows that the dimensionless criticalcollapse thickness depends on both the amount and the length-to-diameterratio of the charge. Defence Science Journal, 2012, 62(5), pp.295-299 , DOI:http://dx.doi.org/10.14429/dsj.62.1237

【 授权许可】

Unknown