A5019077316- High-Velocity Impact and Material Behavior
- Energetic Materials and Combustion
- Metallurgy and Material Forming
- Metal Forming Simulation Techniques
- Additive Manufacturing Materials and Processes
- Advanced materials and composites
- Metal and Thin Film Mechanics
- Structural Response to Dynamic Loads
- Electromagnetic Launch and Propulsion Technology
- Additive Manufacturing and 3D Printing Technologies
- Advanced Thermodynamics and Statistical Mechanics
- Traumatic Ocular and Foreign Body Injuries
- Military Defense Systems Analysis
- Spectroscopy and Quantum Chemical Studies
- Field-Flow Fractionation Techniques
- Welding Techniques and Residual Stresses
Nanjing University of Science and Technology
2017-2025
University of Maryland, College Park
1994
In urban combat, sub-millimeter inert metal powder is used to replace fragments in explosive bombs, which can effectively reduce collateral damage. order investigate the damage effect of high-speed particles on human body, a particle ring filled with charge was designed create an explosion-driven cloud for penetration ballistic gelatin. The made polytetrafluoroethylene (PTFE) and tungsten powder. dispersion properties driven by explosion were studied photography Furthermore, numerical...
Heavy metal powders driven by explosions can enhance the near-field lethality of explosive warheads forming a quasi-pressure field while reducing collateral damage at medium and long ranges. Incorporating polymers into high-content prevents powder sintering under high pressure, enhancing dispersion uniformity making them promising for controllable warhead applications. To describe mechanical behavior materials impact loading, this paper investigates dynamic static properties constitutive...
Given the significantly large deformation and high strain exhibited by explosively formed projectiles (EFP) in penetration, their penetration performance into multi-layer targets differs from that of ordinary bullets or rigid projectiles. Therefore, it is necessary to investigate ballistic damage mechanism target when an EFP penetrates a target. This study conducted high-velocity impact tests EFPs on four types steel targets, analyzing morphology characteristics subjected both macro micro...
We have investigated non-equilibrium fluctuations in liquids subjected to a stationary temperature gradient by performing small-angle Rayleigh scattering experiments. Experimental results been obtained for liquid toluene, n-hexane and three mixtures of these liquids. The experiments confirm that the strength nonequilibrium is proportional square inversely fourth power wave number fluctuations. In case pure excellent agreement with theoretical predictions based on linearized equations...
Metals manufactured by selective laser melting (SLM) with different directions exhibit mechanical properties. This study conducted dynamic and static tests using a universal testing machine split-Hopkinson bar (SHPB). The properties of 18Ni300 0° 90° build SLM were compared, the micro-structure two analysed metallographic tests. Johnson-Cook (J-C) constitutive model was fitted according to experimental results, obtained parameters verified numerical simulations. results revealed that could...
Abstract A multilayer constrained alumina ceramic metal composite armor is designed in this paper. The effect of interlayer steel thickness on penetration process tungsten alloy piercing projectile studied by the test and finite element simulation. results show that case same layer ceramics equal surface density, thicker plate away from impact is, better support to sandwich is. It beneficial maintain initial volume ballistic performance armor. structure paper 26.38 % higher than Q235 with density.
Abstract To improve the lethality of fragmentation bombs against enemy personnel and other targets, one primary goals is to generate as many high-speed, effective fragments possible. A thin shell structure with central pre-formed groove, processed via selective laser melting (SLM), was designed. shell-crushing test utilizing a water medium conducted. The fragment formations parallelogram groove grid square were compared. Additionally, AUTODYN commercial finite element software used simulate...
In order to achieve penetration damage efficiently under larger standoff distance condition, a shaped charge warhead is designed on the basis of jetting penetrator charges (JPC) formation and disruption theory. The paper analyses formation, elongation processes JPC by using LS-DYNA software. results show that tail begins break away at 8.5 diameters (CD) distance. When increases, head velocity decrease while increase, length-diameter ratio increased significantly. Based numerical simulation...