Труды сотрудников ИВМ СО РАН

/ N. A. Makhutov, I. I. Koksharov, A. M. Lepikhin // Strength of Materials. - 1992. - Vol. 23, Is. 5. - P481-488, DOI 10.1007/BF00771443 . - ISSN 0039-2316
Аннотация: Methods used to calculate the reliability indices of structural components (the distribution function of remaining life, the probability of failure-free service, and the risk function) as applies to problems of the propagation of defects under a cyclic load are examined. The potentials of the method of "numeric experiments" are demonstrated in an example of the calculation of crack kinetics in a branch pipe in tension with bending. The reliability indices are calculated for a plane element with a crack by means of numeric integration of determining equations. It is possible to solve problems with different laws governing crack propagation and forms of density distribution for the size of the initial defect within the framework of these methods. A combination of approaches of fracture mechanics and reliability theory with numeric methods of calculation make it possible to evaluate the reliability indices of a defective structural component. В© 1992 Plenum Publishing Corporation.

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Держатели документа:
A. A. Blagonravov Institute of Machinery, Academy of Sciences of the USSR, Moscow, Russian Federation
Computer Center, Siberian Branch, Academy of Sciences of the USSR, Krasnoyarsk, Russian Federation
ИВМ СО РАН

Доп.точки доступа:
Makhutov, N.A.; Махутов, Николай Андреевич; Koksharov, I.I.; Кокшаров, Игорь Ильич; Lepikhin, A.M.; Лепихин, Анатолий Михайлович

[Text] / V. D. KOSHUR // IMPACT AND DYNAMIC FRACTURE OF POLYMERS AND COMPOSITES. Ser. ESIS (EUROPEAN STRUCTURAL INTEGRITY SOCIETY) PUBLICATION : MECHANICAL ENGINEERING PUBL, 1995. - Vol. 19: ESIS European Symposium on Impact and Dynamic Fracture of Polymers and Composites (SEP 20-22, 1993, PORTO CERVO, ITALY). - P401-412. - Cited References: 0 . - ISBN 0-85298-946-6РУБ Engineering, Manufacturing + Engineering, Mechanical + Materials Science, Composites + Polymer Science


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Держатели документа:
RUSSIAN ACAD SCI,CTR COMP,DIV SIBERIAN,KRASNOYARSK 660036,RUSSIA
ИВМ СО РАН
Доп.точки доступа:
KOSHUR, V.D.

[Text] / V. V. Moskvichev, S. V. Doronin // Ind. Lab. - 1996. - Vol. 62, Is. 3. - P174-177. - Cited References: 11 . - ISSN 0019-8447РУБ Instruments & Instrumentation + Materials Science, Characterization & Testing

Аннотация: A method developed on the basis of total probabilistic survivability diagrams, defect rating diagrams and probabilistic service life surfaces of randomly defective structural elements is described. Probabilistic service life surfaces are constructed for welded joints using statistical fracture modeling results. The use of a superelement stress-strain analysis in the design method proposed is discussed.

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Держатели документа:
Computing Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
ИВМ СО РАН

Доп.точки доступа:
Moskvichev, V.V.; Москвичев, Владимир Викторович; Doronin, S.V.

/ I. I. Koksharov // Mech. Compos. Mater. - 1996. - Vol. 32: IX International Conference on the Mechanics of Composite Materials (OCT, 1995, RIGA, LATVIA), Is. 4. - P374-380, DOI 10.1007/BF02254751. - Cited References: 14 . - ISSN 0191-5665РУБ Mechanics + Materials Science, Composites + Polymer Science

Аннотация: In the present work, interest is centered on the theory of fracture and practical approaches to reliability estimation of unidirectional composite materials which are based on it. Fracture mechanics is considered not as a theory of macrocracks but as mechanics of fracture mechanisms of the composites with allowance made for probability estimation. A model of composite material with fibers eliminated from the carrying scheme and parameters specific to the stress-strain-damage state (SSDS) was considered. According to the model, during loading, self-accelerated energy rise is accounted for by structural damages growth - the catastrophe takes place. The model allows us to calculate the critical stress. The composites redistribute forces from overloading zones to neighboring ones by microstructural deformations and damages. It is the effect of reservation of carrying ability. Due to this effect, low-value probability of fracture is sufficiently less for the composite than for homogeneous materials. The approach allows us to evaluate the reliability function for Both static loading and fatigue.

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Держатели документа:
Computing Center, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
ИВМ СО РАН

Доп.точки доступа:
Koksharov, I.I.; Кокшаров, Игорь Ильич

[Text] / A. . Lepikhin, V. . Moskvichev, S. . Doronin // Theor. Appl. Fract. Mech. - 1998. - Vol. 29, Is. 2. - P103-107, DOI 10.1016/S0167-8442(98)00022-6. - Cited References: 8 . - ISSN 0167-8442РУБ Engineering, Mechanical + Mechanics

Аннотация: Probabilistic safety and risk assessment of nuclear reactor equipment are referred to as integrated safety assessment which is implemented by the application of probabilistic fracture mechanics (PFM). Such a study is based on statistical simulation of weld damages under dynamic condition. Because of damage accumulation in welded nuclear reactor components under dynamic load, the need for evaluating the risk of fracture is apparent. This work considers the statistical simulation of dynamic damage of weld joint by fracture. Considered in the analysis are weld defects, damage accumulation, crack initiation and crack growth. (C) 1998 Elsevier Science Ltd. All rights reserved.

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Держатели документа:
Russian Acad Sci, Ctr Comp, Krasnoyarsk 660036, Russia
ИВМ СО РАН

Доп.точки доступа:
Lepikhin, A.M.; Moskvichev, V.; Москвичев, Владимир Викторович; Doronin, S.V.

/ B. D. Annin, V. A. Kovtunenko, V. M. Sadovskii // Springer Proceedings in Mathematics and Statistics. - 2015. - Vol. 121: 2nd International Conference on Applied Mathematics and Informatics, ICAMI 2013 (24 November 2013 through 29 November 2013, ) Conference code: 136889. - P49-56, DOI 10.1007/978-3-319-12583-1_3 . -
Аннотация: This contribution is devoted to the mathematical theory of elastoplastic and granular solids as well as the quasibrittle fracture of nonlinear cracks. Basic variational and hemivariational inequalities describing nonlinear phenomena due to plasticity, internal friction, interfacial interaction, and alike dissipative physics are outlined from the point of view of nonsmooth and nonconvex optimization. Primary results of the nonlinear theory and its application to solid mechanics are surveyed. © Springer International Publishing Switzerland 2015.

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Держатели документа:
Lavrentyev Institute of Hydrodynamics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation
Institute for Mathematics and Scientific Computing, Karl-Franzens University of Graz, NAWI Graz, Heinrichstr. 36, Graz, Austria
Lavrentyev Institute of Hydrodynamics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk State University, Novosibirsk, Russian Federation
Institute of Computational Modeling, Siberian Branch of the Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Annin, B. D.; Kovtunenko, V. A.; Sadovskii, V. M.

/ B. Tarasov [et al.] // Solid State Phenomena : Trans Tech Publications Ltd, 2017. - Vol. 258 SSP. - P165-168, DOI 10.4028/www.scientific.net/SSP.258.165 . -
Аннотация: Recently a new fan-hinged shear rupture mechanism has been identified as a unique mechanism of dynamic shear ruptures. In the fan-mechanism, the shear rupture propagation is driven by a fan-shaped rupture head consisting of an echelon of intercrack (domino-like) blocks formed due to the consecutive creation of small tensile cracks in the rupture tip. The fan-structure propagates through the intact material as a wave and has a number of extraordinary features, one of which is extremely low shear resistance of the rupture head (below the frictional strength). Here we present a mathematical model elucidating the principles of this new mechanism. The model will support comprehensive studies of unique features of the discovered phenomenon. © 2017 Trans Tech Publications, Switzerland.

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Держатели документа:
The University of Western Australia, 35 Stirling Highway, Crawley, WA, Australia
Institute for Applied Mathematics FEB RAS, 5 Radio St, Vladivostok, Russian Federation
Institute of Computational Modeling SB RAS, 50/44 Akademgorodok, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Tarasov, B.; Guzev, M.; Sadovskiy, V.; Losev, A.

/ B. G. Tarasov [et al.] // Int. J. Fract. - 2017. - Vol. 207, Is. 1. - P87-97, DOI 10.1007/s10704-017-0223-1. - Cited References:30. - The authors acknowledge the support provided by the Centre for Offshore Foundation Systems (COFS) at the University of Western Australia. . - ISSN 0376-9429. - ISSN 1573-2673РУБ Materials Science, Multidisciplinary + Mechanics

Аннотация: Experiments on frictional stick-slip instability in brittle materials and natural observations show that friction falls towards zero in the head of shear ruptures propagating with extreme velocities (up to supershear levels). Although essential for understanding earthquakes, fracture mechanics and tribology the question of what physical processes determine how weakening occurs is still unclear. Here, using a mathematical model, we demonstrate that the extremely low friction can be caused by a fan-like fault structure formed on the basis of a tensile-cracking process observed in all extreme ruptures. The mathematical model visualises and describes the fan-structure as a mechanical system during rupture propagation. It explains some features observed in laboratory experiments.

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Держатели документа:
Univ Western Australia, Ctr Offshore Fdn Syst, Stirling Highway 35, Perth, WA 6009, Australia.
Russian Acad Sci, Inst Appl Math, Far Eastern Branch, Radio St 7, Vladivostok 690041, Russia.
Russian Acad Sci, Inst Computat Modelling, Siberian Branch, Akademgorodok 50-44, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Tarasov, Boris G.; Guzev, Mikhail A.; Sadovskii, Vladimir M.; Cassidy, Mark J.; Centre for Offshore Foundation Systems (COFS) at the University of Western Australia

/ N. V. Eremin, V. V. Moskvichev // Journal of Physics: Conference Series : Institute of Physics Publishing, 2020. - Vol. 1431: 8th International Conference on Deformation and Fracture of Materials and Nanomaterials, DFMN 2019 (19 November 2019 through 22 November 2019, ) Conference code: 157047, Is. 1. - Ст. 012020, DOI 10.1088/1742-6596/1431/1/012020 . -
Аннотация: A probabilistic numerical model for fracture of unidirectional composite materials is developed. The algorithm for numerical simulation of the model takes into account the random distribution of carbon fibers, the spread of mechanical properties and the fracture of the structural elements of the material. Multivariate numerical experiments of the composite material of a composite overwrapped pressure vessel under tensile loads were carried out. The analysis of the patterns of deformation and fracture of a composite material is carried out. The physical mechanism of deformation and fracture of a composite material corresponds to a numerical model. The stress-strain curves of a numerical model of a composite material at 70% carbon fiber content are presented. The calculated values of Young's modulus and tensile strength of the composite material at different percentages are obtained. A comparative analysis of experimental and numerical results showed that the results corresponded to 15%. Using of a numerical model of deformation and fracture of unidirectional composite materials makes it possible to track the mechanics of the processes of fracture of fibers and matrix, to obtain the most accurate analysis of the stress-strain state, and to develop generalized methods for calculating the strength of composite overwrapped pressure vessels © Published under licence by IOP Publishing Ltd.

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Держатели документа:
Institute of Computational Technologies, SB RAS, Krasnoyarsk Branch Office, Krasnoyarsk, Russian Federation
Institute of Computational Modeling, Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Eremin, N. V.; Moskvichev, V. V.