A5030105683- High-Velocity Impact and Material Behavior
- Structural Response to Dynamic Loads
- Transportation Safety and Impact Analysis
- Mechanical and Thermal Properties Analysis
- Mechanical Behavior of Composites
- Electromagnetic Launch and Propulsion Technology
- Energetic Materials and Combustion
- Cellular and Composite Structures
- Structural Analysis of Composite Materials
- Hydraulic and Pneumatic Systems
- Structural Engineering and Vibration Analysis
- Mechanical Engineering Research and Applications
- Automotive and Human Injury Biomechanics
- Vibration Control and Rheological Fluids
- Structural Engineering and Materials Analysis
- Metal Forming Simulation Techniques
- Rock Mechanics and Modeling
- Combustion and Detonation Processes
- Microstructure and mechanical properties
- Material Properties and Applications
- Additive Manufacturing and 3D Printing Technologies
- Powder Metallurgy Techniques and Materials
- Engineering and Material Science Research
- Textile materials and evaluations
- Additive Manufacturing Materials and Processes
Military University of Technology in Warsaw
2014-2024
Military University
2013
Stereolithography (SLA) is an additive manufacturing process based on the photocuring of resins with use UV light. The printed samples can be used not only for visualization structures, but also to develop elements real constructions. In study, SLA-printed made Formlabs’ Durable Resin were tested in static, dynamic, and Hopkinson’s bar tests. recommended heat curing time this resin 60 min each process. For tests, 5-minute 30-min times considered. obtained stress-strain curves compared....
The multilayer structure of an ultra-high molecular weight polyethylene (UHMWPE) composite material was investigated in the terahertz (THz) spectral range by means time-domain spectroscopy (TDS) technique. Such structures consist many alternating layers fibers, each being perpendicular to other and having a thickness about 50 μm. Refractive indices two samples sample composed four single (plies) same fiber orientation were determined for orthogonal orientations electric field transmission...
Honeycomb aluminum structures are used in energy-absorbing constructions military, automotive, aerospace and space industries. Especially, the protection against explosives military vehicles is very important. The paper deals with study of selected honeycomb sandwich materials subjected to static dynamic compressive loading. equipment includes: strength machine, drop hammer Split Hopkinson Pressure Bar (SHPB). results show influence applied strain rate on properties, especially Plateau...
This paper presents a procedure to compute the parameters of Karagozian and Case Concrete (KCC) constitutive model for brittle materials based on dolomite rock. First, fracture energy toughness rock were determined from two experimental tests: semicircular bending test (SCBT) Brazilian indirect tension (BT). Next, novel optimization-based strategy was developed efficiently calibrating damage parameters, broad parametric study performed Finally, optimal validated through three SCBT, BT...
Abstract High strain rate experimental tests are essential in a development process of materials under strongly dynamic conditions. For such loading the Split Hopkinson Pressure Bar (SHPB) has been widely used to investigate behaviour various materials. It was found that for different shapes generated wave desired. This paper presents parametric study order find striker’s design variables, which influence pulse peak shape incident bar. With data given it possible verify developed numerical...
Abstract Materials and their development process are highly dependent on proper experimental testing under wide range of loading within which high-strain rate conditions play a very significant role. For such dynamic Split Hopkinson Pressure Bar (SHPB) is widely used for investigating the behavior various materials. The presented paper focused SHPB impulse measurement using numerical methods. One main problems occurring during tests oscillations recorded by strain gauges adversely affect...
This paper presents the results of bench-tests and calculations assessing influence temperature on performance a two-pipe hydraulic shock absorber. The absorber prepared for tests was cooled with dry ice to corresponding that associated average winter conditions in temperate climate. range during testing ensured via equipping it thermocouple monitoring thermal imaging camera. During testing, subjected kinematic forces selected frequency two different, fixed displacement amplitudes. showed...
Abstract The main aim of the work was experimental and numerical analysis energy absorption/dissipation capabilities failure mechanisms novel hyper-elastic target material intended for ballistic applications including layers composite armors, projectile catching systems anti-ricochet covering walls shooting ranges, tunnels, etc. Static dynamic mechanical properties were analyzed at both room elevated temperatures ( $$40\div 80\,^{\circ }\hbox {C}$$ <mml:math...
This paper presents a comparison between mechanical compressive and tensile properties of S355 structural (mild) steel in wide range strain rates. A split Hopkinson pressure bar apparatus is used to investigate the dynamic behaviour at high rates (740–5880 s−1). hydro-pneumatic machine (5–25 s−1) modified (300–850 are study rate sensitivity under tension. Quasi-static tests conducted on universal electromechanical testing machine. The model parameters two commonly constitutive equations...
This article presents the results of dynamic tests sandstone samples differing in strength parameters and porosity, which were carried out with use split Hopkinson pressure bar (SHPB). For this study, three types sandstones considered: two from region India (Kandla Grey Apricot Pink) one Central Europe (Barwald). The identified static (UCS, BTS tests), whereas porosity was measured using computed tomography. performed scanning allowed volume pores their distribution to be identified. Dynamic...
Experimental dynamic tests for energy absorption by four selected auxetic fabrics were conducted and analyzed. An original test stand was designed, manufactured attached to a Hopkinson's bar. The absorbed an curtain expressed in terms of the maximum elastic deformation unit volume along support line witness-plate. A quasi-impulse load induced using gas blast under pressure corresponding indoors deflagration explosion propane-air mixture vented room. fabric with best energy-absorption...
Abstract The aim of the study is to identify relevant aspects numerical analysis impact projectiles with soft cores into a package composed thin flexible plies located on plastic backing. In order illustrate problem, normal 7.62 mm TT projectile an unclamped comprising 36 Dyneema SB71 supported backing was selected. problem solved use finite element method (FEM) explicit integration scheme (central difference method) motion equations in matrix form. Based conducted computations, it revealed...