Mechanism of Multi-Layered Fragment Separation Due to High Explosive Loading

2019 ◽  
Author(s):  
AZIZUDDIN IMTIAZ ◽  
DHARMA TEJA KAMBAM ◽  
MAHESH M. SUCHEENDRAN
Keyword(s):  
High Explosive ◽  
Explosive Loading

Transformation of Structure in Carbon Steel Specimen under Loading by Mach Stem, Formed in Preliminary Compressed High Explosive Charge TG-40

2011 ◽  
Vol 673 ◽  
pp. 89-94 ◽  
Author(s):  
Ivan A. Bataev ◽  
Igor A. Balagansky ◽  
Anatoly Bataev ◽  
Kazuyuki Hokamoto
Keyword(s):  
Carbon Steel ◽  
Explosive Charge ◽  
High Explosive ◽  
Steel Specimen ◽  
Explosive Loading ◽  
Metallographic Analysis ◽  
Heterogeneous Structure ◽  
Mach Stem ◽  
Localized Deformation ◽  
Current Loading

A structure of a carbon steel specimen after explosive loading is investigated. The loading was executed by Mach stem, formed in high explosive charge that was preliminary compressed by advanced wave in ceramic bar. In the original condition the specimen had a typical for low carbon steel ferrite-pearlite structure. Metallographic analysis has shown that during the process of the explosive loading the following structural changes took place: formation of numerous deformation twins in both ferrite grains and pearlite colonies (i.e. in two-phase structure); formation of extended bands of localized deformation, which are not crystallographically connected with the original ferrite-pearlite structure; fine grains formation in zones of severe plastic flow. The size of the ferrite grains is by an order of magnitude less than the original grains size. According to the authors’ opinion, above-noted structural peculiarities demonstrate that loading conditions achieved in the current loading scheme differ from common. The phenomenon of non-typical twinning in heterogeneous structure (pearlite) indirectly evidences that extremely high stresses and strain rates took place in the specimen during the loading.

An improved technique of expanding metal ring experiment under high explosive loading

2013 ◽  
Vol 84 (4) ◽  
pp. 043908 ◽  
Author(s):  
Tiegang Tang ◽  
Guowu Ren ◽  
Zhaoliang Guo ◽  
Qingzhong Li
Keyword(s):  
High Explosive ◽  
Explosive Loading ◽  
Metal Ring ◽  
Improved Technique

scholarly journals Study on dynamic fragmentation of multiple metal rings under high explosive loading

2014 ◽  
Vol 500 (11) ◽  
pp. 112060
Author(s):  
Tiegang Tang ◽  
Guowu Ren ◽  
Zhaoliang Guo ◽  
Qingzhong Li
Keyword(s):  
High Explosive ◽  
Explosive Loading ◽  
Dynamic Fragmentation ◽  
Metal Rings

An Explosive Loading Technique for the Uniform Expansion of 304 Stainless Steel Cylinders at High Strain Rates

1980 ◽  
Vol 47 (1) ◽  
pp. 17-20 ◽  
Author(s):  
M. J. Forrestal ◽  
B. W. Duggin ◽  
R. I. Butler
Keyword(s):  
Stainless Steel ◽  
High Strain ◽  
High Explosive ◽  
Fracture Initiation ◽  
Explosive Loading ◽  
304 Stainless Steel ◽  
Strain Rates ◽  
Annular Layer ◽  
Inner Diameter ◽  
Uniform Expansion

A new explosive loading technique is applied to study the uniform plastic expansion and fracture initiation of 304 stainless steel cylinders. An annular layer of dry PETN high explosive is placed in contact with the inner diameter of the cylinder and surface-initiated with an array of etched copper bridgewires. This technique produces a simultaneous detonation of the explosive and a nearly uniform expansion of the stainless steel cylinders.

scholarly journals Hugoniot measurements on copper to 0.8 TPa by laser-driven shock waves

1993 ◽  
Vol 11 (3) ◽  
pp. 611-616 ◽  
Author(s):  
Gu Yuan ◽  
Wang Yonggang ◽  
Fu Sizu ◽  
Wu Jiang ◽  
Yu Songyu ◽  
...  
Keyword(s):  
High Pressure ◽  
Shock Waves ◽  
High Explosive ◽  
Shock Adiabat ◽  
Explosive Loading ◽  
Nuclear Test ◽  
Impedance Match ◽  
Test Environment ◽  
Pressure Region ◽  
Laser Facility

An experiment on Al-Cu impedance-match targets, carried out at the Shenguang highpower laser facility, is described. The shock adiabat of Cu in the pressure region 0.4- 0.8 TPa, measured experimentally, is close to the extrapolated results of the data at lower pressure obtained with a high-explosive loading facility and also is in agreement with the data at high pressure measured in the underground nuclear test environment.

Numerical and Experimental Study of Destruction of Metal Pipes Through Use of High Explosive

2006 ◽  
Author(s):  
Hideki Hamashima ◽  
Ian Owens Pericevic ◽  
Moji Moatamedi ◽  
Shigeru Itoh
Keyword(s):  
Experimental Study ◽  
Computer Simulation ◽  
Numerical Simulations ◽  
High Power ◽  
High Speed ◽  
High Explosive ◽  
Explosive Loading ◽  
Three Dimensions ◽  
High Speed Camera ◽  
Metal Pipes

Various liquids are commonly transported through metal pipes. For reasons of safety it is important to understand the behavior of pipes when subject to an explosive loading from within. This research paper is concerned with examining the expansion and destruction of metal pipes subjected to a high power explosion by high explosive. An experimental study was carried out for this research and visualized using high-speed camera images. Results were then compared to a computer simulation of the same problem. Numerical simulations are performed in three dimensions using the LS-DYNA code. Results obtained numerically compared well to those from experiment.

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