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

scholarly journals Inside Cover: Sensitivity and Phase Transition of Heated ϵ -CL-20 in Drop-Weight Impact Test (Prop., Explos., Pyrotech. 11/2018)

2018 ◽  
Vol 43 (11) ◽  
pp. 1080-1080
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.

scholarly journals Experimental Investigation on the Impact Resistance of Carbon Fibers Reinforced Coral Concrete

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4000 ◽  
Author(s):  
Bing Liu ◽  
Jingkai Zhou ◽  
Xiaoyan Wen ◽  
Jianhua Guo ◽  
Xuanyu Zhang ◽  
...  
Keyword(s):  
Weibull Distribution ◽  
Carbon Fibers ◽  
Impact Test ◽  
Concrete Strength ◽  
Impact Resistance ◽  
Initial Crack ◽  
Drop Weight ◽  
Weight Impact ◽  
The Impact ◽  
Two Parameter

In this study, the impact resistance of coral concrete with different carbon fiber (CF) dosages subjected to drop-weight impact test was investigated. For this purpose, three concrete strength grades (C20, C30, C40) and six CF dosages (0.0%, 0.3%, 0.6%, 1.0%, 1.5%, and 2.0% by weight of the binder) were considered, and a total of 18 groups of carbon fibers reinforced coral concrete (CFRCC) were cast. For each group, eight specimens were tested following the drop-weight impact test suggested by CECS 13. Then, the two-parameter Weibull distribution theory was adopted to statistically analyze the variations in experimental results. The results indicated that the addition of CFs could transform the failure pattern from obvious brittleness to relatively good ductility and improve the impact resistance of coral concrete. Moreover, the impact resistance of CFRCC increases with the CF dosage increasing. The statistical analysis showed that the probability distribution of the blow numbers at the initial crack and final failure of CFRCC approximately follows the two-parameter Weibull distribution.

Recommendation of Adequate Sampling Rate for Drop Weight Impact Test with Application of Nyquist's Sampling Theorem

2015 ◽  
Vol 15 (3) ◽  
pp. 61-67 ◽  
Author(s):  
Jin Young Lee ◽  
Dan Bi Kim ◽  
Ki yeon Kwon ◽  
Young soo Yoon
Keyword(s):  
Impact Test ◽  
Sampling Rate ◽  
Sampling Theorem ◽  
Drop Weight ◽  
Adequate Sampling ◽  
Weight Impact

scholarly journals Drop Weight Impact Test Fracture of Vinyl Ester Composites: Micrographs of Pilot Study

2005 ◽  
Vol 39 (18) ◽  
pp. 1607-1620 ◽  
Author(s):  
H. Ku ◽  
Y. M. Cheng ◽  
C. Snook ◽  
D. Baddeley
Keyword(s):  
Pilot Study ◽  
Vinyl Ester ◽  
Impact Test ◽  
Drop Weight ◽  
Weight Impact

Suggested modified testing techniques to the ACI 544-R repeated drop-weight impact test

2020 ◽  
Vol 244 ◽  
pp. 118321 ◽  
Author(s):  
Sallal R. Abid ◽  
Munther L. Abdul Hussein ◽  
Sajjad H. Ali ◽  
Ala'a F. Kazem
Keyword(s):  
Impact Test ◽  
Drop Weight ◽  
Testing Techniques ◽  
Weight Impact

scholarly journals Designing and manufacturing of a drop weight impact test machine

2013 ◽  
Vol 1 (2) ◽  
pp. 69-76 ◽  
Author(s):  
F. Taheri-Behrooz ◽  
M.M. Shokrieh ◽  
H.R. Abdolvand
Keyword(s):  
Impact Test ◽  
Test Machine ◽  
Drop Weight ◽  
Weight Impact

Drop-Weight Impact Test for Fibre Reinforced Concrete: Analysis of Test Configuration

2021 ◽  
pp. 61-73
Author(s):  
Juan Carlos Vivas ◽  
Facundo Isla ◽  
María Celeste Torrijos ◽  
Graciela M. Giaccio ◽  
Bibiana Luccioni ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Impact Test ◽  
Fibre Reinforced Concrete ◽  
Test Configuration ◽  
Drop Weight ◽  
Weight Impact
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