Search Results - "Karabutov, A"

LASER-ULTRASOUND DIAGNOSTICS OF PLASTIC PRODUCTS MANUFACTURED BY LASER STEREOLITHOGRAPHY by Karabutov, A. A., Novikov, M. M.

“…This paper discusses the application of methods of non-destructive testing and flaw detection of plastic products manufactured by additive technologies. The…”
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Nondestructive assessment of local microcracking degree in orthoclase and plagioclase feldspars using spectral analysis of backscattered laser-induced ultrasonic pulses by Podymova, N.B., Karabutov, A.A.

“…•Nondestructive ultrasonic assessment of microcracking degree in minerals is proposed.•Laser-ultrasonic transducer operating in the backward detection mode is…”
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The Influence of Microcracking Degree of Feldspars on the Spectral Power of Backscattered Broadband Pulses of Longitudinal Ultrasonic Waves by Podymova, N. B., Karabutov, A. A.

“…In this work, we study the influence of microcracks in laboratory samples of feldspars on the spectral power of broadband pulses of longitudinal ultrasonic…”
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The Influence of Porosity on the Statistical Amplitude Distribution of Backscattered Ultrasonic Pulses in Reactive Cast Metal–Matrix Composites by Podymova, N. B., Karabutov, A. A.

“…In this work, we study the influence of the local porosity in isotropic reactive cast particulate reinforced metal–matrix composites on the statistical…”
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Transformation of laser-induced broadband pulses of longitudinal ultrasonic waves into pulses of shear waves in an isotropic solid plate immersed in a liquid by Podymova, N.B., Karabutov, A.A.

“…•Longitudinal-to-shear wave transformation for broadband ultrasonic pulses is studied.•Theoretical and experimental studies on aluminum and silica plates in…”
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Transverse structure and energy deposition by a subTW femtosecond laser in air: from single filament to superfilament by Pushkarev, D, Mitina, E, Shipilo, D, Panov, N, Uryupina, D, Ushakov, A, Volkov, R, Karabutov, A, Babushkin, I, Demircan, A, Morgner, U, Kosareva, O, Savel'ev, A

“…We traced experimentally transition from a single air filament to the superfilament under action of powerful loosely focused (NA ∼ 0.0021) femtosecond beam…”
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Analysis of changes in optical properties with time as a way to assess the instability of the structure of diluted aqueous-based ferromagnetic fluids by Sokolovskaya, Yu.G., Podymova, N.B., Karabutov, A.A.

“…•Laser optoacoustic method was used.•Diluted ferromagnetic fluids were studied.•Light extinction coefficient and its depth distribution in ferrofluids were…”
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Quantitative analysis of the influence of voids and delaminations on acoustic attenuation in CFRP composites by the laser-ultrasonic spectroscopy method by Karabutov, A.A., Podymova, N.B.

“…The aim of the present work is to develop the ultrasonic spectroscopy method using laser thermoelastic generation and piezoelectric detection of broadband…”
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Precision Measurement of the Group Velocity of Ultrasound in Samples with Millimeter Thickness by Makalkin, D. I., Karabutov, A. A., Savateeva, E. V.

“…A methodology is proposed for high-precision local measurement of the group velocity of longitudinal waves in solid samples with millimeter thickness…”
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Laser Optoacoustic Method for Detecting Violations in the Periodicity of the Structure of Carbon Fiber Reinforced Plastic Composites by Sokolovskaya, Yu. G., Podymova, N. B., Karabutov, A. A.

“…— Broadband acoustic spectroscopy with a laser source of probe pulses is used to detect violations in the periodicity of the structure of carbon fiber…”
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Laser–Ultrasonic Study of Local Porosity Distribution in Carbon Fiber Reinforced Plastic Stringer Panels by Sokolovskaya, Yu. G., Podymova, N. B., Karabutov, A. A.

“…A method for quantitative evaluation of the porosity in carbon fiber reinforced plastic (CFRP) structures based on laser excitation of probe ultrasonic pulses…”
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Three-dimensional hybrid optoacoustic imaging of the laser-induced plasma and deposited energy density under optical breakdown in water by Rumiantsev, B. V., Mareev, E. I., Bychkov, A. S., Karabutov, A. A., Cherepetskaya, E. B., Makarov, V. A., Potemkin, F. V.

“…We report on a hybrid optoacoustic method aimed to retrieve the three-dimensional spatial distributions of the plasma electron density and the deposited energy…”
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Conversion of Thermooptically Excited Broadband Pulses of Longitudinal Acoustic Waves into Pulses of Shear Waves in an Isotropic Solid Plate in a Liquid by Podymova, N. B., Karabutov, A. A.

“…We have theoretically studied the time profiles of broadband pulses of shear acoustic waves obtained as a result of conversion of thermooptically excited…”
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Robust multifilament arrays in air by Dammann grating by Pushkarev, D. V., Lar’kin, A. S., Mitina, E. V., Zhidovtsev, N. A., Uryupina, D. S., Volkov, R. V., Karpeev, S. V., Khonina, S. N., Karabutov, A. A., Geints, Yu. E., Kosareva, O. G., Savel’ev, A. B.

“…We compare transverse structure evolution and energy deposition into the medium within focused multifilament arrays created using two different types of…”
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Detecting Violations in Stacking of Fiber Layers in CFRPs Using Broadband Acoustic Spectroscopy by Sokolovskaya, Yu. G., Podymova, N. B., Karabutov, A. A.

“…The possibility of detecting violations in stacking layers of reinforcing fabric in CFRPs, i.e., gaps between carbon fiber tapes, is demonstrated. Broadband…”
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Nondestructive Porosity Assessment of CFRP Composites with Spectral Analysis of Backscattered Laser-Induced Ultrasonic Pulses by Karabutov, A. A., Podymova, N. B.

“…The laser-ultrasonic method for nondestructive quantitative local porosity assessment for CFRP composites is proposed and realized experimentally for only one…”
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Effect of laser-induced ultrasound treatment on material structure in laser surface treatment for selective laser melting applications by Ivanov, Ivan A., Dub, Vladimir S., Karabutov, Alexander A., Cherepetskaya, Elena B., Bychkov, Anton S., Kudinov, Igor A., Gapeev, Artem A., Krivilyov, Mikhail D., Simakov, Nikolay N., Gruzd, Svetlana A., Lomaev, Stepan L., Dremov, Vladimir V., Chirkov, Pavel V., Kichigin, Roman M., Karavaev, Alexey V., Anufriev, Maxim Yu, Kuper, Konstantin E.

“…A new mechanism for controlling the microstructure of products in manufacturing processes based on selective laser melting is proposed. The mechanism relies on…”
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Measurement of Local Modules of Elasticity of Construction Materials using Laser Ultrasonic Sources by Makalkin, D. I., Karabutov, A. A., Savateeva, E. V., Simonova, V. A.

“…This paper presents the results of experimental measurements of the elastic moduli of structural materials using a technique with laser sources of ultrasonic…”
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Laser Optoacoustic Method for Measurement of Light Extinction Coefficient and Investigation of Its Spatial Distribution in Colloidal Media by Sokolovskaya, Yu. G., Podymova, N. B., Karabutov, A. A.

“…In the present work, the method which allows investigating the spatial distribution of light extinction coefficient in colloidal media is experimentally…”
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Determinating the Volume Content of a Polymeric Matrix in CFRP Structures Using a Laser-Ultrasonic Method by Sokolovskaya, Yu. G., Zharinov, A. N., Karabutov, A. A., Podymova, N. B.

“…An acoustic method for a quantitative assessment of the volume content of a polymeric matrix in CFRPs is proposed and realized experimentally. For this…”
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