In order to study the morphology characteristics of PTFE/Al reactive shaped charge jet and chemical reaction during formation, liners with aluminum particle sizes 5 ?m 100 were prepared. The parameters Johnson–Cook constitutive model materials (RMs) obtained through quasi-static compression experiments SHPB (Split Hopkinson Pressure Bar) experiments. X-ray imaging technology was used photograph...

Two stages gas guns are used for various purposes, particularly for mechanical characterization of materials at high rate of deformations. The performance of a two stages gas gun is studied in this work using the theory of the two-stage gas gun proposed by Rajesh, numerical simulation using combined Eulerian/ Lagrangian elements in Autodyna commercial code and experiment using a two stage gas g...

Abstract A representative and most commonly used ballistic target system consisting of a 93W ball Q235 steel plate is investigated for its limit fast calculation engineering model. The basic data on the material projectile was obtained through quasi-static compression tests mechanical properties materials. Using Φ12.7mm gun ten shot v50 method, were carried out with balls positively penetrating...

In the semiconductor industry, hydrogen is used with many other hazardous and dangerous substances flammable, toxic, corrosive properties. order to safely handle them, convenient-to-use gas cabinets are often required. As known well, highly flammable explosive, risk analysis needs use in cabinets. this study, overpressure impact according various cabinet conditions were measured when leaks cabi...

A dynamic disturbance will induce cracks around the tunnel in blasting or shield construction. To investigate overall stability of with various angles during a fixed borehole (round hole explosion) blasting, models containing an individual crack different were introduced for simulation research. The research set up thin sheet model length 350 mm and width 150 mm, 7 diameter pre-existing 75 5 mi...

In order to quantitatively describe the energy dissipation law of jointed rock mass, we obtained cores in laboratory conditions using marble from roof and floor Jinchanghe Lead–zinc mine Baoshan. The dissipative degree stress wave mass is measured by introducing quality factor Qs parameter. Based on experimental principle Split Hopkinson Pressure rod loading device (SHPB), proposed a three-wave...