Measurement of Shock Initiation Threshold of HNAB by flyer plate impact

1986 ◽  
Vol 11 (5) ◽  
pp. 144-149 ◽  
Author(s):  
E. Hasman ◽  
M. Gvishi ◽  
Y. Carmel
Keyword(s):  
Flyer Plate ◽  
Plate Impact ◽  
Shock Initiation

scholarly journals TRIDENT flyer plate Impact technique: comparison to gas gun plate impact technique

2009 ◽  
Author(s):  
Darcie D Koller ◽  
George T Gray, III ◽  
Sheng-Nian Luo
Keyword(s):  
Flyer Plate ◽  
Plate Impact ◽  
Gas Gun ◽  
Technique Comparison

scholarly journals Comparative Study of Indentation Size Effects in As-Sintered Alumina and Alumina Shock Deformed at 6.5 and 12 GPa

ISRN Ceramics ◽  
2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Riya Chakraborty ◽  
Anoop K. Mukhopadhyay ◽  
Keshaw D. Joshi ◽  
Amit Rav ◽  
Ashok K. Mandal ◽  
...  
Keyword(s):  
Structural Integrity ◽  
Indentation Size Effect ◽  
High Strain ◽  
Coarse Grain ◽  
Flyer Plate ◽  
Alumina Ceramics ◽  
Indentation Size ◽  
Plate Impact ◽  
Depth Data ◽  
Gas Gun

Nanohardness of alumina ceramics determines its performance in all contact-related applications because the issue of structural integrity gets determined at the nanoscale of contact. In spite of the wealth of the literature, however, it is not yet known in significant details how the high-strain rate flyer-plate impact at different pressure affects the nanohardness of dense, coarse grain alumina ceramics. Thus, the load controlled nanoindentation experiments were performed with a Berkovich indenter on an as-received coarse grain (~10 μm), high density (~3.98 gm·cc−1) alumina, and shock recovered tiny fragments of the same alumina obtained from gas gun experiments conducted at 6.5 GPa and 12 GPa shock pressures with stainless steel flyer plates. The nanohardness of the as-received alumina was much higher than that of the 6.5 GPa and 12 GPa shock-recovered alumina. The indentation size effect (ISE) was the strongest in alumina shocked at 12 GPa and strong in alumina shocked at 6.5 GPa, but it was mild in the as-received alumina sample. These results were rationalized by analysis of the experimental load depth data and evidences obtained from field emission scanning electron microscopy. In addition, a rational picture of the nanoindentation responses of the as-received and shocked alumina ceramics was provided by a qualitative model.

Shock synthesis of niobium silicide (Nb5Si3) via the flyer plate impact technique with high impact velocities

2018 ◽  
Vol 740 ◽  
pp. 1032-1036 ◽  
Author(s):  
Xuyu Ling ◽  
Fusheng Liu ◽  
Mingjian Zhang ◽  
Qijun Liu
Keyword(s):  
High Impact ◽  
Flyer Plate ◽  
Plate Impact ◽  
Niobium Silicide

The Role of Inclusions in the Failure of Boron Carbide Subjected to Impact Loading

2019 ◽  
Author(s):  
Andrew L. Tonge ◽  
Brian E. Schuster
Keyword(s):  
Boron Carbide ◽  
Impact Loading ◽  
Inelastic Deformation ◽  
Flyer Plate ◽  
Plate Impact ◽  
Simple Loading ◽  
Early Stages ◽  
Experimental Geometry

Abstract This work investigates the importance of the microstructure of boron carbide for initiating inelastic deformation under impact conditions. Simple loading resulting from a flyer plate impact geometry is used to illustrate the importance of microstructure for the well-controlled and easily instrumented experimental geometry. A second set of simulations is performed on a miniaturized impact geometry to investigate the importance of the microstructure for the early stages of semi-infinite penetration for impact velocities between 0.9 km/s and 1.9 km/s. The effect of the microstructure is more pronounced for the flyer plate impact geometry.

scholarly journals Ultrasonic Detection of Spall Damage Distribution Subjected to Plate Impact Test with Different Thickness

2018 ◽  
Vol 183 ◽  
pp. 02029
Author(s):  
Naoya Nishimura ◽  
Toshihiro Ito ◽  
Takeru Watanabe
Keyword(s):  
Tensile Stress ◽  
Impact Test ◽  
Plate Thickness ◽  
Flyer Plate ◽  
Plate Impact ◽  
Target Plate ◽  
Damage Distribution ◽  
Spall Damage ◽  
The Impact ◽  
Different Thickness

Plate impact test on medium carbon steel were carried out to the target plate by impacting the flyer plate with one-third and two-thirds thickness of the target plate. The spall damage within the target plate was evaluated non-destructively with a low frequency scanning acoustic microscope as well as ultrasonic velocity and backscattering intensity. We observed the spall damage distribution by the B-and Cscan images. The distribution of spall damage through the plate thickness depends on the tensile stress area within the target plate. The difference of spall damage distribution was investigated by the plate impact test by flyer plate with different thickness. In the plate impact test by the flyer plate with 1/3 target plate thickness, the spall damage was generated by tensile stress area which superposed in the back surface side. On the other hand, in the case of 2/3 target plate thickness, the spall damage was detected at the impact surface side. By generating the spall damage in the different position through the target thickness, it will be possible to evaluate the accumulation of spall damage by reflection and transmission of the stress wave at the internal damage subjected to repeated impact.

scholarly journals Simulation of shock waves in flyer plate impact experiments

2010 ◽  
Vol 28 (4) ◽  
pp. 539-545 ◽  
Author(s):  
S. Neff ◽  
R. Presura
Keyword(s):  
Flyer Plate ◽  
Plate Impact ◽  
Simulation Code ◽  
Hydrodynamic Simulation ◽  
One Dimensional ◽  
Theoretical Predictions ◽  
Shock Hugoniot ◽  
Data Tables ◽  
Impact Experiments ◽  
Good Agreement

AbstractIn this paper we present a newly developed one-dimensional hydrodynamic simulation code and use it to determine the shock evolution in flyer plate impact experiments. The code is Lagrangian with artificial viscosity and uses shock Hugoniot data in its equation-of-state calculations instead of SESAME data tables. First shock calculations for transparent targets show a good agreement with theoretical predictions, making the code suitable for designing future flyer impact experiments at the Nevada Terawatt Facility.

Sign in / Sign up

Export Citation Format

Share Document