A5036105864- Structural Response to Dynamic Loads
- High-Velocity Impact and Material Behavior
- Cellular and Composite Structures
- Vibration Control and Rheological Fluids
- Fluid Dynamics Simulations and Interactions
- Combustion and Detonation Processes
- Vibration and Dynamic Analysis
- Elasticity and Material Modeling
- Electromagnetic Launch and Propulsion Technology
- Mechanical Engineering and Vibrations Research
- Transportation Safety and Impact Analysis
- Advanced Measurement and Detection Methods
- Fire dynamics and safety research
- Mechanical Behavior of Composites
- Sports Dynamics and Biomechanics
- Flow Measurement and Analysis
- Aquatic Ecosystems and Phytoplankton Dynamics
- Geochemistry and Elemental Analysis
- Hydraulic and Pneumatic Systems
- Epoxy Resin Curing Processes
- Marine and coastal ecosystems
- Wind and Air Flow Studies
- Fluid Dynamics and Heat Transfer
- Underwater Vehicles and Communication Systems
- Dynamics and Control of Mechanical Systems
National University of Defense Technology
2020-2024
Nanjing Normal University
2023
The expansion tube is a promising energy absorption structure in spacecraft and airplanes, where it often exposed to impact stress. Despite prior studies on the deformation mode of tubes have been conducted, majority them relied quasi-static load. This research has utilized theoretical, computational, experimental approaches concentrate behaviors dynamic impacts. results show that strain-rate effect downward velocity discrepancy could even cause transition tube. theoretical model...
The expansion tube is normally used in impact-resistant components, owing to the stable force, and high specific energy-absorption capacity. This paper reports deformation mechanism energy absorption characteristics of subject impact velocity ranging from 0.083 m/s 48.84 m/s. effects cone piston semi angle, wall thickness, on performance were studied via experimental measurements numerical modeling. mechanical responses measured using a universal gas gun setup. capacity absorber was...
Abstract Explosion shock waves are the main cause of target destruction when ammunition explodes. Parameter testing these is important. Traditional equivalent methods exhibit limited quantification capabilities and exclusively applicable to near-field wave testing. In this study, a device was designed quantitatively assess energy. The consists an energy conversion structure, absorbing element (EAE), package shell. cutting absorption method used absorb explosion energy, tool lever structure...
An analysis of the dynamic response and damage assessment partially confined metallic cylinders under transverse air-blast loading is presented in this paper. The examination blast shock wave load distribution consequences standoff distances on plastic deformation was conducted with meticulous attention experimental testing. charges TNT were determined to have masses 16.3 kg 29.5 kg, while at which they placed from target varied between 1.5 m 4.25 m. Three unique modes found exist...
Spring-loaded valves are widely used to protect sealed container filled with liquid against sudden excessive overpressure, however the instability vibration of valve spool under dynamic loading may lead safety incidents. In this paper, spring-loaded is simplified an air-back mass-spring constrain boundary (AMSCB) investigate respond subjected underwater pressure pulse. A modified split Hopkinson bar (SHPB) adopted generate controllable pulse establish relationship between specific impulse...
The coastal zone is considered as a major carbon pool. Iron minerals and phosphates are vital factors affecting the amounts occurrence of total organic (TOC) in sediments. However, coupling mechanisms iron (Fe) phosphorous (P) source-sink transition TOC sediments poorly understood. This study characterized distribution Fe, P contents three independent 170 cm sediment cores sampled from aquaculture area eastern Jiangsu Province, quantified correlations among P, median grain diameter (Dx(50)),...
An expansion tube is an ideal energy absorber which dissipates kinetic through plastic deformation and friction. There urgent need to understand the influence of key parameters such as semi-angle, material, friction coefficient on mechanical characteristics tubes. In present work, material properties tubes were tested under quasi-static loading conditions, numerical simulations carried out using a commercial software ABAQUS. The validated finite element revealed that absorption capacity...
Expansion tube is ideal energy absorber which dissipates kinetic through plastic deformation and friction. There an urgent need to understand the influence of key parameter, e.g. semi angle, material, friction coefficient, on mechanical response absorption characteristics expansion tube. In present work, material properties tubes were tested under quasi-static loading condition, numerical simulations carried out by using commercial software ABAQUS. Based validated finite element simulation,...
Abstract Expansion tube absorber is a kind of excellent energy absorption devices owing to its good mechanical characteristics. In this study, the two-dimensional axisymmetric finite element models expansion were established simulate influence length cone area and radius cylindrical on properties tube. It found that force increases significantly with decrease in axial direction. Then, reaches stable value when semi angle 45°. The increases, but trend force-displacement curves does not...