FACTORS INFLUENCING IGNITION AND EXPLOSION CHARACTERISTICS OF EXPLOSIVES UNDER DROP WEIGHT IMPACT

2013 ◽  
Vol 12 (5) ◽  
pp. 429-446
Author(s):  
Qi Zhang ◽  
Shaoqiao Hu
Keyword(s):  
Factors Influencing ◽  
Drop Weight ◽  
Weight Impact

scholarly journals Drop weight impact measurements of HE sensitivity: modified detection methods

2014 ◽  
Vol 500 (18) ◽  
pp. 182033 ◽  
Author(s):  
D N Preston ◽  
G W Brown ◽  
B C Tappan ◽  
D M Oshwald ◽  
J R Koby ◽  
...  
Keyword(s):  
Detection Methods ◽  
Drop Weight ◽  
Weight Impact

scholarly journals Low velocity drop weight impact behavior of Al2O3-Ni-ZrO2 and Al2O3-Ni-Cr2O3 nanocomposite systems

2021 ◽  
Author(s):  
Betül Kafkaslıoğlu Yıldız ◽  
Murat Büyük ◽  
Yahya Kemal Tür
Keyword(s):  
Network Formation ◽  
Low Energy ◽  
Impact Behavior ◽  
Precipitation Method ◽  
Low Velocity ◽  
Ballistic Performance ◽  
Crack Network ◽  
Damage Mechanisms ◽  
Drop Weight ◽  
Weight Impact

Abstract 1 vol% Ni particulate Al2O3 matrix nanocomposites prepared by the heterogeneous precipitation method with ZrO2 (5 vol%) or Cr2O3 (1 vol%) additives were subjected to the low energy drop weight impact tests to compare the behavior of the compositions under low energy impact and to investigate the damage mechanisms. The pure Al2O3, Al2O3/Ni, Al2O3/ZrO2, and Al2O3/Cr2O3 compositions with the same additive ratios were also produced to make the comparison systematically. Also, the Vickers hardness measurements were carried out and a significant increase in hardness was attained for both Al2O3/Ni + ZrO2 and Al2O3/Ni + Cr2O3. The average hardness value around 24.8 ± 1.0 GPa was measured for Al2O3/Ni + ZrO2 and Al2O3/Ni + Cr2O3 which means ∼ 15% improvement compared to the pure Al2O3. Between all the compositions, the maximum force (Fmax) value was obtained for Al2O3/Ni + ZrO2 for 12 J impact energy level (26617 N) according to the low energy drop weight impact test results. Tensile radial crack network formation, cone formation, fracture and crushing of the cone structure were observed as damage mechanisms for all the compositions. The volume of conical frustum structure was evaluated for each composition and the effect of microstructure on possible ballistic performance was also discussed.

Sensitivity and Phase Transition of Heatedϵ-CL-20 in Drop-Weight Impact Test

2018 ◽  
Vol 43 (11) ◽  
pp. 1164-1170 ◽  
Author(s):  
Xue Zheng ◽  
Shaojun Yu ◽  
Wen Wen ◽  
Yushi Wen ◽  
Pei Wang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Impact Test ◽  
Drop Weight ◽  
Weight Impact

The effect of microwave pretreatment on impact crushing of lead-zinc ore

2021 ◽  
Vol 118 (5) ◽  
pp. 501
Author(s):  
Yulong Liu ◽  
Dexin Ding ◽  
Wenguang Chen ◽  
Nan Hu ◽  
Lingling Wu ◽  
...  
Keyword(s):  
Energy Input ◽  
Impact Test ◽  
Characteristic Parameters ◽  
Microwave Pretreatment ◽  
Drop Weight ◽  
Lead Zinc ◽  
Weight Impact ◽  
Impact Crushing ◽  
The Impact ◽  
The Relationship

The relationship between energy input and particle size of ore samples after crushing and effect of microwave pretreatment on impact crushing of lead-zinc ore were studied by drop weight impact test. The results showed that the lead-zinc ore became softer and had higher degree of crushing after microwave pretreatment. Compared with continuous microwave pretreatment, pulsed microwave pretreatment could improve the drop weight impact crushing efficiency of lead-zinc ore. When the specific comminution energy were 5 kW h/t, 10 kW h/t respectively, the crushing characteristic parameters t10 were 60.42% and 67.46% respectively by continuous microwave. But the values of t10 were increased to 68.64% and 75.88% respectively after pulsed microwave radiation under same microwave power and time. In addition, water quenching could more promote the impact crushing efficiency of lead-zinc ore after microwave irradiation.

STUDIES OF THE ERL-TYPE 12 DROP-WEIGHT IMPACT MACHINE AT NOL

1949 ◽  
Author(s):  
E. H. Eyster ◽  
L. C. Smith
Keyword(s):  
Impact Machine ◽  
Drop Weight ◽  
Weight Impact
Sign in / Sign up

Export Citation Format

Share Document