Готові списки джерел за темами / Laser induced projectile impact testing

Добірка наукової літератури з теми "Laser induced projectile impact testing"

Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 28 січня 2023

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Статті в журналах з теми "Laser induced projectile impact testing"

Sousa, Bryer C., Kristin L. Sundberg, Matthew A. Gleason, and Danielle L. Cote. "Understanding the Antipathogenic Performance of Nanostructured and Conventional Copper Cold Spray Material Consolidations and Coated Surfaces." Crystals 10, no. 6 (June 12, 2020): 504. http://dx.doi.org/10.3390/cryst10060504.

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The role of high strain rate and severe plastic deformation, microstructure, electrochemical behavior, surface chemistry and surface roughness were characterized for two copper cold spray material consolidations, which were produced from conventionally gas-atomized copper powder as well as spray-dried copper feedstock, during the course of this work. The motivation underpinning this work centers upon the development of a more robust understanding of the microstructural features and properties of the conventional copper and nanostructured copper coatings as they relate to antipathogenic contact killing and inactivation applications. Prior work has demonstrated greater antipathogenic efficacy with respect to the nanostructured coating versus the conventional coating. Thus, microstructural analysis was performed in order to establish differences between the two coatings that their respective pathogen kill rates could be attributed to. Results from advanced laser-induced projectile impact testing, X-ray diffraction, scanning electron microscopy, electron backscatter diffraction, scanning transmission microscopy, nanoindentation, energy-dispersive X-ray spectroscopy, nanoindentation, confocal microscopy, atomic force microscopy, linear polarization, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy and copper ion release assaying were performed during the course of this research.

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Odaci, Kutlay, Cenk Kılıçaslan, Alper Taşdemirci, Athanasios G. Mamalis, and Mustafa Güden. "Projectile Impact Testing Aluminum Corrugated Core Composite Sandwiches Using Aluminum Corrugated Projectiles: Experimental and Numerical Investigation." Materials Science Forum 910 (January 2018): 102–8. http://dx.doi.org/10.4028/www.scientific.net/msf.910.102.

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E-glass/polyester composite plates and 1050 H14 aluminum trapezoidal corrugated core composite sandwich plates were projectile impact tested using 1050 H14 aluminum trapezoidal fin corrugated projectiles with and without face sheets. The projectile impact tests were simulated in LS-DYNA. The MAT_162 material model parameters of the composite were determined and then optimized by the quasi-static and high strain rate tests. Non-centered projectile impact test models were validated by the experimental and numerical back face displacements of the impacted plates. Then, the centered projectile impact test models were developed and the resultant plate displacements were compared with those of the TNT mass equal Conwep simulations. The projectiles with face sheets induced similar displacement with the Conwep blast simulation, while the projectiles without face sheets underestimated the Conwep displacements, which was attributed to more uniform pressure distribution with the use of the face sheets on the test plates.

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Badziak, J., E. Krousky, J. Marczak, P. Parys, T. Pisarczyk, M. Rosiński, A. Sarzynski, et al. "Efficient acceleration of a dense plasma projectile to hyper velocities in the laser-induced cavity pressure acceleration scheme." Laser and Particle Beams 36, no. 1 (January 25, 2018): 49–54. http://dx.doi.org/10.1017/s0263034617000945.

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AbstractThe experimental study of the plasma projectile acceleration in the laser-induced cavity pressure acceleration (LICPA) scheme is reported. In the experiment performed at the kilojoule PALS laser facility, the parameters of the projectile were measured using interferometry, a streak camera and ion diagnostics, and the measurements were supported by two-dimensional hydrodynamic simulations. It is shown that in the LICPA accelerator with a 200-J laser driver, a 4-μg gold plasma projectile is accelerated to the velocity of 140 km/s with the energetic acceleration efficiency of 15–19% which is significantly higher than those achieved with the commonly used ablative acceleration and the highest among the ones measured so far for any projectiles accelerated to the velocities ≥100 km/s. This achievement opens the possibility of creation and investigation of high-energy-density matter states with the use of moderate-energy lasers and may also have an impact on the development of the impact ignition approach to inertial confinement fusion.

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Chen, Shawn H., Amanda J. Souna, Christopher L. Soles, Stephan J. Stranick, and Edwin P. Chan. "Using microprojectiles to study the ballistic limit of polymer thin films." Soft Matter 16, no. 16 (2020): 3886–90. http://dx.doi.org/10.1039/d0sm00295j.

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In this work, a microballistic impact test called laser induced projectile impact test (LIPIT) was used to study the perforation behavior of polycarbonate thin films to demonstrate the importance of film thickness on the film's ballistic limit.

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Xing, Jie, and Yin Xian Duo. "Vibration Influence of Artillery Autoloader Analysis and Testing." Advanced Materials Research 711 (June 2013): 540–44. http://dx.doi.org/10.4028/www.scientific.net/amr.711.540.

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The inconsistency of the projectile's seizing-bore stroke of the large caliber gun during feeding process will lead to differences of the volume of propellant chamber and starting pressure of projectiles.It will also affect guns' muzzle velocity and firing accuracy.In order to improve the positioning accuracy of projectiles in an arm-type autoloader,first of all,high speed photography was used and only to find that there will be vibrations of projectiles in the direction of gravity.The vibrations will consume kinetic energy of the projectile and contribute to inconsistency of the retaining force.By means of analyzing the working mechanism of the rammer,the motion relationship among the parts during ramming process came to clear eventually.Then the position of the exciting source which causes vibrations of the projectile can be determined by analyzing the force situation of the rammer in the stationary state and the state of motion,and next,testing the amplitude and frequency of the position using laser displacement sensor.Finally,the improved scheme was raised to eliminate the impact of the vibration on stability of ramming.

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Figliola, Nino, David Schmidt, and Jae-Hwang Lee. "Pressure- and Size-Dependent Aerodynamic Drag Effects on Mach 0.3–2.2 Microspheres for High-Precision Micro-Ballistic Characterization." Applied Sciences 12, no. 13 (June 30, 2022): 6622. http://dx.doi.org/10.3390/app12136622.

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The acceleration of microparticles to supersonic velocities is required for microscopic ballistic testing, a method for understanding material characteristics under extreme dynamic conditions, and for projectile gene and drug delivery, a needle-free administration technique. However, precise aerodynamic effects upon supersonic microsphere motion at sub-300 Reynolds numbers have not been quantified. We derive drag coefficients for microspheres traveling in air at subsonic, transonic, and supersonic velocities from the measured trajectories of microspheres launched by laser-induced projectile acceleration. Moreover, the observed drag effects on microspheres in atmospheric (760 Torr) and reduced pressure (76 Torr) are compared with existing empirical data and drag coefficient models. We find that the existing models adequately predict the drag coefficient for subsonic microspheres, while rarefaction effects cause a discrepancy between the model and empirical data in the supersonic regime. These results will improve microsphere flight modeling for high-precision microscopic ballistic testing and projectile gene and drug delivery.

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KOMINE, Ryoma, Takumi FURUTANI, Yugo SAKAI, and Akio YONEZU. "Development of Laser-induced Projectile Impact method and plastic deformation behavior at high strain rate." Proceedings of the Materials and Mechanics Conference 2021 (2021): OS0505. http://dx.doi.org/10.1299/jsmemm.2021.os0505.

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Peng, Yifei, Guohu Luo, Yongxiang Hu, and Ding-Bang Xiong. "Extreme strain rate deformation of nacre-inspired graphene/copper nanocomposites under laser-induced hypersonic micro-projectile impact." Composites Part B: Engineering 235 (April 2022): 109763. http://dx.doi.org/10.1016/j.compositesb.2022.109763.

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Badziak, J., M. Kucharik, and R. Liska. "Production of sub-gigabar pressures by a hyper-velocity impact in the collider using laser-induced cavity pressure acceleration." Laser and Particle Beams 35, no. 4 (September 21, 2017): 619–30. http://dx.doi.org/10.1017/s0263034617000660.

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AbstractProduction of high dynamic pressure using a strong shock wave is a topic of high relevance for high-energy-density physics, inertial confinement fusion, and materials science. Although the pressures in the multi-Mbar range can be produced by the shocks generated with a large variety of methods, the higher pressures, in the sub-Gbar or Gbar range, are achievable only with nuclear explosions or laser-driven shocks. However, the laser-to-shock energy conversion efficiency in the laser-based methods currently applied is low and, as a result, multi-kJ multi-beam lasers have to be used to produce such extremely high pressures. In this paper, the generation of high-pressure shocks in the newly proposed collider in which the projectile impacting a solid target is driven by the laser-induced cavity pressure acceleration (LICPA) mechanism is investigated using two-dimensional hydrodynamic simulations. A special attention is paid to the dependence of shock parameters and the laser-to-shock energy conversion efficiency on the impacted target material and the laser driver energy. It has been found that both in case of low-density and high-density solid targets, the shock pressures in the sub-Gbar range can be produced in the LICPA-based collider with the laser energy of only a few hundreds of joules, and the laser-to-shock energy conversion efficiency can reach values of 10–20%, by an order of magnitude higher than the conversion efficiencies achieved with other laser-based methods used so far.

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Khandaker, Morshed, Abdellah Ait Moussa, Desmond Nuyebga Sama, Fereshteh Safavinia, Susmita Hazra, Onur Can Kalay, Fatih Karpat, Erik Clary, and Amgad Haleem. "Laser-Induced Microgrooves Improve the Mechanical Responses of Cemented Implant Systems." Micromachines 11, no. 5 (April 29, 2020): 466. http://dx.doi.org/10.3390/mi11050466.

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The impact of a laser-induced microgroove (LIM) architecture on mechanical responses of two cemented implant systems was evaluated. One system consisted of two aluminum alloy rods bonded end-to-end by polymethylmethacrylate cement. The second system consisted of a custom-made, aluminum tibial tray (TT) cemented in an artificial canine tibia. Control specimens for each system were polished smooth at the cement interface. For LIM samples in the rod system, microgrooves were engraved (100 µm depth, 200 µm width, 500 µm spacing) on the apposing surface of one of the two rods. For TT system testing, LIM engraving (100 µm spacing) was confined to the underside and keel of the tray. Morphological analysis of processed implant surfaces revealed success in laser microgrooving procedures. For cemented rods tested under static tension, load to failure was greater for LIM samples (279.0 ± 14.9 N vs. 126.5 ± 4.5 N). Neither non-grooved nor grooved TT samples failed under cyclic compression testing (100,000 cycles at 1 Hz). Compared with control specimens, LIM TT constructs exhibited higher load to failure under static compression and higher strain at the bone interface under cyclic compression. Laser-induced microgrooving has the potential to improve the performance of cemented orthopedic implants.

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Тези доповідей конференцій з теми "Laser induced projectile impact testing"

Komine, Ryoma, Takumi Furutani, Yugo Sakai, and Akio Yonezu. "Plastic Deformation Behavior at High Strain Rate by Using High Velocity Micro-Particle Collisions." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-71166.

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Abstract It is well known that plastic deformation behavior of metallic material depends on the length-scale and time-scale due to dislocation motions in material. The plasticity affected by scale down and higher strain rate is still open to discuss. In other words, both size effect and strain rate effect are critical issue for plasticity. Macro-scale experiment of bulk materials for higher strain rate have been well established. On the other hand, experiment of the micro and nano scales with higher strain rate has not been established. This study developed an experimental method to conduct micro-particle collisions, causing high strain rate deformation on the target materials surface. This is called laser-induced projectile impact test (LIPIT), which is impact indentation test. Due to laser ablation, we could successfully project micro-particles, resulting in particle collision with the material surface at higher strain rate. By changing the laser energy, the indentation crater depth can be significantly changed. We established a testing method which is capable of higher strain rate at micro-scale. In addition, finite element method (FEM) was carried out to simulate the plastic deformation behavior due to particle collision at higher strain rate, so that we investigate plastic deformation at the micro scale under higher strain rate.

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Liu, Ji, Donge Zhao, and Hanchang Zhou. "A laser screen method for non-contact measurement of projectile impact location." In Information Optoelectronics, Nanofabrication and Testing. Washington, D.C.: OSA, 2012. http://dx.doi.org/10.1364/iont.2012.if4a.02.

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Tomac, Mehmet N., Kevin Yugulis, and James W. Gregory. "Investigation of Side-View Mirror Flow-Induced Vibration Phenomena." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30887.

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The primary objective of this research is to develop an understanding of the flow mechanisms which induce side-view mirror vibrations. The unsteady nature of the flow over side-view mirrors causes unsteady aerodynamic load distributions and flow-induced vibrations on the mirror assembly. These vibrations generate blurred rear-view images and higher noise levels, affecting the safety and comfort of the passengers. Geometrical design features of side-view mirrors exacerbate the flow-induced vibration levels of the mirror assembly significantly. This work quantifies the impact of these design features on the vibration amplitude; develops a methodology for testing mirror vibrations in a small, low-speed wind tunnel using only the mirror of interest; and delves into the interactions between the bluff body mirror geometry and its wake. Two similar side-view mirror designs, a baseline design and a turn-signal design, were investigated. The baseline mirror has a sharp-edged corner near the trailing edge, while the turn-signal design has an edge with an increased radius of curvature for the tip profile. A laser-based vibration measurement technique was developed and used to quantify vibration levels. Flow visualization, Particle Image Velocimetry (PIV), Constant Temperature Anemometry (CTA), and Surface Stress Sensitive Film (S3F) techniques were used to understand the separation characteristics over the mirrors since the time-dependent changes in separation location directly affect the unsteady loading on the mirror. The flow over the turn signal mirror with larger tip radius has larger excursions in the separation location, a wider wake, increased unsteadiness, and higher vibration levels. Results at the high Reynolds numbers for these test conditions indicate the absence of a discrete vortex shedding frequency. However, vortical structures in the wake are correlated with unsteady movement of the separation location.

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