Explosively Driven Fracture and Damage Reduction Measures for Structural Components
Explosive loads are applied to uniformly expand symmetrical structural components: tubular cylinders, spherical shells and rings of 304 stainless steel rapidly to fragmentation and transfer planar shock waves into plates of the same material to spallation with use of wire-explosion techniques for initiation of high explosive PETN, and in addition with such fracture tests damage reduction measures: wall doubling of cylinders and notch machining on the free surfaces of the plates are evaluated experimentally and numerically. The effects of wall thicknesses, explosive driver diameters and types of components are investigated on the deformation and fragmentation. Recovered fragments are examined on a fragmentation model. In the double walled cylinder tests, only for lowermost amount of the explosive the outer cylinder has caught the fragments of inner cylinder perfectly, and for other cases expanded outer cylinder has reached fragmentation different from those for single walled cylinders, revealing applicability of a penetration model. In case of plate tests, V-notch rows with various size parameters are produced on the free surfaces of the plates and the cross-sectional views of tested specimens shows that remarkable effect on the reduction of spall damage has been achieved, suggesting a notch parameter chart for spall damage evaluation.
HIROE Tetsuyuki FUJIWARA Kazuhito HATA Hidehiro KAWASHIMA Fumiko YAMASHITA Wataru
Graduate School of Science and Technology,Kumamoto University,Kumamoto,860-8555,Japan
国际会议
2011 International Autumn Seminar on Propellants,Explosives and Pyrotechnics(2011国际推进剂、炸药、烟火技术秋季研讨会)
南京
英文
454-463
2011-09-20（万方平台首次上网日期，不代表论文的发表时间）