Search Results - "Botvina, L. R."

On the Time Dependences of the Fracture Concentration Parameter Estimated by Different Methods by Botvina, L. R., Zavyalov, A. D., Sinev, I. O.

“…The time dependences of the fracture concentration parameter characterizing the process of accumulation of defects formed in loaded objects, i.e., steel…”
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Effect of the Shear Component of Loading on the Damage and Microrelief of Fractures of Specimens of Low-Carbon Steel by Klevtsov, G. V., Botvina, L. R., Soldatenkov, A. P., Pegaleva, I. N.

“…Special features of the microrelief of fractures of notched specimens of steel 20 tested under shear, opening and mixed loading modes are studied by x-ray…”
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The Benefits and Challenges of Interdisciplinary Research by Botvina, L. R.

“…This brief review takes a look at our joint research with Prof. G.I. Barenblatt and at some outcomes of his interdisciplinary initiatives. The research covers…”
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Gigacycle Fatigue of the Turbocharger Gear Wheel by Botvina, L. R., Tyutin, M. R., Alexandrov, A. P.

“…The goal of the study is to elucidate the reasons for early fracture of the gear wheel teeth of a Cameron TA9000 turbocharger (1820 kW) after an operational…”
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Statistical Microhardness Distribution Parameters and Their Relations with the Characteristics of Local Deformation and the Attenuation Coefficient of Ultrasonic Waves by Larionova, A. V., Botvina, L. R.

“…—The results of the study of low-carbon and structural alloyed steels using microhardness, attenuation of ultrasonic waves, and local grain deformation…”
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New acoustic parameter characterizing loading history effects by Botvina, L.R., Tyutin, M.R.

“…•Acoustic emission gap before the fracture is proposed as a new AE parameter.•This parameter increases with the number of preliminary loading cycles.•Fracture…”
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Dynamic fragmentation in steel cylindrical shells by Botvina, L.R., Larionova, A.V.

“…•Shells from brittle and ductile steels were tested and fragmentation mechanisms were studied.•Shell fragment distributions by mass were analyzed using…”
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Hierarchy of Microcracks under Cyclic and Static Loads by Botvina, L. R., Bolotnikov, A. I., Sinev, I. O.

“…The paper analyzes the evolution of microcracks in austenitic and carbon steels on evidence from our studies and literature data. The well-known Lotka–Volterra…”
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Fracture of 30CrMnSiA Steel under Mixed-Mode Loads by Botvina, L. R., Beletsky, E. N., Tyutin, M. R., Demina, Yu. A., Sinev, I. O., Bolotnikov, A. I.

“…Notched 30CrMnSiA steel specimens were exposed to rupture load (mode I) at an angle of 90° between their fracture surface and load direction and to shear load…”
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Determination of Fatigue Failure Parameters from the Depth of Plastic Zones Beneath the Fracture Surface by Klevtsov, G. V., Botvina, L. R., Klevtsova, N. A., Valiev, R. Z., Pigaleva, I. N.

“…Fatigue failure is the most common type of failure in aircrafts, motor vehicles, medical devices, and other engineering systems, and its study is crucial for…”
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Effect of Preliminary Cycling on the Acoustic Emission Characteristics of Structural 15Kh2GMF Steel by Botvina, L. R., Tyutin, M. R., Bolotnikov, A. I., Petersen, T. B.

“…The stages of changing the acoustic emission characteristics of 15Kh2GMF steel used for manufacturing oil-pump sucker rods is studied during tension before and…”
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Dynamic Fracture Toughness of High-Strength 5KhN3МА Steel by Botvina, L. R., Tyutin, M. R., Perminova, Yu. S., Utkin, A. V.

“…High-strength martensitic–austenitic 5KhN3MA steel is subjected to static and impact bending tests. The crack initiation and propagation energies, the dynamic…”
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Investigation of D16ch Alloy Fracture Kinetics by Acoustic Emission, Digital Image Correlation, and Real Damage Analysis by Botvina, L. R., Bolotnikov, A. I., Sinev, I. O., Tyutin, M. R., Beletskii, E. N.

“…—The mechanical and physical properties of a D16ch alloy, which is used as the fuselage skin of the IL-62M aircraft with a service life of more than 28 years,…”
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Fracture Stages and Residual Strength of Pipe Steel after Long-Term Operation by Botvina, L. R., Kushnarenko, V. M., Tyutin, M. R., Levin, V. P., Morozov, A. E., Bolotnikov, A. I.

“…The paper investigates the mechanical and physical properties of low-carbon pipe steel (analog of steel 20 corresponding to TU-28-FR-73) after 39 years of…”
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On the Concentration Criterion of Fracture by Botvina, L. R., Soldatenkov, A. P.

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Damage Kinetics of Pre-Cycled Low-Carbon Steel with Coarse-Grained and Ultrafine-Grained Structure by Botvina, L. R., Tyutin, M. R., Sinev, I. O., Bolotnikov, A. I., Levin, V. P., Beletsky, E. N., Perminova, Yu. S., Rybalchenko, O. V., Dobatkin, S. V.

“…The kinetics of microcracks accumulation and fracture at various stages of tension of grade 20 steel samples with coarse-grained and ultrafine-grained (UFG)…”
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Size Effect during Bending Tests of Fiber-Reinforced Concrete Specimens by Tyutin, M. R., Botvina, L. R., Shuvalov, A. N., Petersen, T. B., Levin, V. P., Sineev, A. A., Solov’ev, V. G.

“…—The influence of reinforcement with basalt fibers in an amount of 0.6 vol % on the size effect in concrete made of Portland cement TsEM II/A-K(Sh-I) 42.5N…”
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Changes in the Physical Properties and the Damage of Low- and Medium-Carbon Steels during Tension by Tyutin, M. R., Botvina, L. R., Sinev, I. O.

“…The relation between the physical parameters of nondestructive testing (coercive force, eddy current parameter, self-magnetic field, acoustic emission…”
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Residual Strength, Microhardness, and Acoustic Properties of Low-Carbon Steel after Cyclic Loading by Botvina, L. R., Tyutin, M. R., Petersen, T. B., Levin, V. P., Soldatenkov, A. P., Prosvirnin, D. V.

“…The residual strength of low-carbon steel after cyclic loading before different numbers of cycles at various stress amplitudes is estimated. The correlation of…”
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The Acoustic Gap as a Diagnostic Sign of Prefracture by Botvina, L. R., Petersen, T. B., Tyutin, M. R.

“…The relation between the acoustic-gap period observed during the tension of previously loaded samples from steels 20 and 45 and the plastic-deformation work…”
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