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Рябов, Павел Николаевич

Организационные подразделения

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Институт лазерных и плазменных технологий

Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.

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Рябов

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Павел Николаевич

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Теперь показываю 1 - 8 из 8

Только метаданные
Localization of plastic flow in one-dimensional and two-dimensional problems
(2021) Kudryashov, N. A.; Ryabov, P. N.; Muratov, R. V.; Кудряшов, Николай Алексеевич; Рябов, Павел Николаевич; Муратов, Родион Владимирович
© 2021 Institute of Physics Publishing. All rights reserved.In this paper one-dimensional and two-dimensional models are used for investigation of the processes of adiabatic shear bands (ASB) formation. Significant characteristics of a localization process at different nominal strain-rates are studied in the series of the numerical simulations. The results obtained for one-dimensional and two-dimensional problems are compared.
Только метаданные
On collective behavior of shear bands in dipolar HY-100 steel and OFHC copper
(2019) Kudryashov, N. A.; Muratov, R. V.; Ryabov, P. N.; Кудряшов, Николай Алексеевич; Муратов, Родион Владимирович; Рябов, Павел Николаевич
© 2019 Author(s).The collective behavior of adiabatic shear bands in dipolar HY-100 steel and OFHC copper is studied. The mathematical model is formulated. The numerical algorithm which is based on the spiting method is suggested. This algorithm allows one to simulate the process of multiple or single band evolution taking into account dipolar effects. Also the method of dynamical adaptation of spatial grid nodes is applied in proposed numerical algorithm. The verification procedure was performed to show the efficiency and accuracy of proposed numerical method. The statistical properties of the processes of multiple shear bands formation in dipolar steel and copper are studied.
Только метаданные
A finite volume method for numerical simulations of adiabatic shear bands formation
(2021) Muratov, R. V.; Kudryashov, N. A.; Ryabov, P. N.; Муратов, Родион Владимирович; Кудряшов, Николай Алексеевич; Рябов, Павел Николаевич
© 2021 Elsevier B.V.The aim of this paper is to develop an effective finite volume method for numerical simulation of the adiabatic shear bands (ASB) formation processes. A formation of ASB happens at high-speed shear strains of ductile materials. A numerical simulation of such problems using Lagrangian approach is associated with some problems, the main one of which is a mesh distortion at large deformations. We use Eulerian approach to describe a motion of the non-linear elasto-plastic material. More specifically, we consider a modification of a well-known hypoelastic Wilkins model. In this paper we suggest a numerical method for modeling of high-speed shear deformations on two-dimensional meshes. The method is verified on the three test problems suggested by other authors.
Только метаданные
On Specific Features of an Approach Based on Feedforward Neural Networks to Solve Problems Based on Differential Equations
(2023) Ladygin, S. A.; Karachurin, R. N.; Ryabov, P. N.; Kudryashov, N. A.; Ладыгин, Станислав Аркадьевич; Карачурин, Рауль Нуриевич; Рябов, Павел Николаевич; Кудряшов, Николай Алексеевич
Только метаданные
On Features of Formation of Localized Shear Bands in Depleted Uranium
(2023) Muratov, R. V.; Ryabov, P. N.; Kudryashov, N. A.; Муратов, Родион Владимирович; Рябов, Павел Николаевич; Кудряшов, Николай Алексеевич
Только метаданные
Strain Rate Hardening at Adiabatic Shear Bands Formation
(2023) Muratov, R. V.; Kudryashov, N. A.; Ryabov, P. N.; Муратов, Родион Владимирович; Кудряшов, Николай Алексеевич; Рябов, Павел Николаевич
Только метаданные
Numerical studies of self-organization of shear bands in one and two dimensions
(2023) Muratov, R. V.; Kudryashov, N. A.; Ryabov, P. N.; Муратов, Родион Владимирович; Кудряшов, Николай Алексеевич; Рябов, Павел Николаевич
In the present manuscript we perform a numerical analysis of the self-organization processes of adiabatic shear bands formation in depleted uranium, aluminum alloy, and high-strength steel in one- and two-dimensional cases. Since the processes of shear bands formation are strongly nonlinear, three materials with significantly different parameters considered allow us to generalize obtained dependencies. For all materials, we investigate the evolution of stress, temperature and velocity fields from initial to final stage of localization. It is well known that localization processes occur during the high shear rate loads in the presence of initial microstructural defects in metallic materials. Starting with a random distribution of initial stress, which models microstructural defects, we obtained new dependencies for such significant parameters of the problem considered such as localization time and spacing between shear bands. The influence of initial plastic strain rate on these parameters was also studied. We obtain the linear dependence of localization time on initial strain rate and show that spatial dimension significantly influences on its value. Also, we introduce the method of shear bands selection during computations and present new statistical distributions for band spacing. We show that the interaction between shear bands significant influences on the spacing between them.
Только метаданные
Exploring the Efficiency of Neural Networks for Solving Dynamic Process Problems: The Fisher Equation Investigation
(2024) Karachurin, R.; Ladygin, S.; Ryabov, P.; Shilnikov, K.; Kudryashov, N.; Карачурин, Рауль Нуриевич; Ладыгин, Станислав Аркадьевич; Рябов, Павел Николаевич; Шильников, Кирилл Евгеньевич; Кудряшов, Николай Алексеевич