Theoretical and experimental study of a method for the protection of spacecraft from high–speed particles

Герасимов, А. В.; Dobritsa, D. B.; Пашков, С. В.; Khristenko, Yu. F.

doi:10.1134/s0010952516020015

Cited by 22 publications

(7 citation statements)

References 6 publications

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“…The system of governing equations solved during the simulation includes the laws of conservation of mass, momentum and energy, the equation of state, relationships, which determine the relations for the deviators of the elastoplastic medium, and the Mises yield criterion. 18 These equations and a computational scheme for their solution are presented in detail in Wilkins. 19 A modified finite element method proposed by Johnson et al 20,21 was selected as a numerical method for PS300.…”

Section: Exploding Cylinder Testsmentioning

confidence: 99%

Probabilistic approach in modelling dynamic fracture problems

Пашков

Зелепугин

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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The paper represents a probabilistic approach to the finite element modelling of dynamic fracture problems. It is proposed to model internal structural defects and inhomogeneities using the spatial distribution of strength characteristics according to the normal distribution law. The probabilistic approach to modelling dynamic fracture is provided by the introduction of one additional parameter – the dispersion in the distribution of strength material properties. This approach provides the probabilistic nature to the initiation and development of cracks in the material at any scale level: macro, meso and micro level. There are no restrictions on the size of computational mesh and elements, the fracture criterion and the material models to apply this approach. The probabilistic approach is also applicable to multilevel modelling using the appropriate distribution of inhomogeneities. This approach does not require a detailed study of the material structure, which enhances the predictive nature of computations. The numerical results of exploding cylinder tests and the penetration of thin targets by a projectile are presented. Numerical results are in good qualitative and quantitative agreement with experimental data.

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Section: Exploding Cylinder Testsmentioning

confidence: 99%

Probabilistic approach in modelling dynamic fracture problems

Пашков

Зелепугин

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…In order to verify the approach used, the experimental data were compared with the results of numerical simulations. Figure 3a shows the result of an experiment on the penetration of a thin metal barrier conducted at the research Institute of Applied Mathematics and Mechanics of Tomsk State University with a light-gas gun [10]. The plate thickness of 1.7 mm is made of alloy AMg6, used in the protective shields of spacecraft.…”

Section: Modeling Of Dynamic Fracture 31 'Petaling' Of Thin Barriersmentioning

confidence: 99%

A probabilistic approach to modeling collisions with thin barriers

Пашков

2019

EPJ Web Conf.

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In many fracture problems, fragmentation is essentially a probabilistic process, which is determined by the stochastic nature of the distribution of inhomogeneities of the internal structure of material. The probabilistic approach is described, which allows us to model structural heterogeneities of the material in a simple form, practically without any complication of the model and additional experiments. Using experimental data and numerical simulation results, it is shown that the introduction of only one additional parameter (dispersion of the strength properties distribution) into the material model makes it possible to give a probabilistic character to the crack formation process at any scale level, which corresponds to theoretical concepts and experimental data. Distribution of materials strength characteristics (according to the selected distribution law) in the cells of the computational domain is used for initial heterogeneities and materials structure defects modeling. It is shown that the number and size of the “petals” at the penetration of thin barriers depend of the speed of the projectile and the strength characteristics of the barrier.

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“…Научные основы разработки материалов с многоуровневой иерархической структурой, в том числе для экстремальных условий эксплуатации DOI: 10.17223/9785946218412/237 ЭКСПЕРИМЕНТАЛЬНЫЕ ИССЛЕДОВАНИЯ ПРОЧНОСТИ ЭЛЕМЕНТОВ КОСМИЧЕСКОЙ ТЕХНИКИ ПРИ ВОЗДЕЙСТВИИ МЕЛКИХ ФРАГМЕНТОВ КОСМИЧЕСКОГО И ТЕХНОГЕННОГО МУСОРА 1 Добрица Д.Б., 2 Жалнин Е.В., 2 Пашков С.В., 2 Христенко Ю.Ф. 1 Акционерное общество «Научно-производственное объединение им. С.А.…”

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“…Для ускорения ударников в виде шариков с формой «близкой к идеальной» использовался, разработанный в НИИ ПММ, способ свободного (без поддона) метания, когда шарик ускоряется в стволе непосредственно газовым потоком. Данный цикл исследований проведен в рамках сравнения эффективности защиты элементов космической техники различной конструкции [1].…”

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JeKSPERIMENTAL''NYE ISSLEDOVANIJa PROChNOSTI JeLEMENTOV KOSMIChESKOJ TEHNIKI PRI VOZDEJSTVII MELKIH FRAGMENTOV KOSMIChESKOGO I TEHNOGENNOGO MUSORA

2019

International Workshop "Multiscale Biomechanics and Tribology of Inorganic and Organic Systems" ; Mezhdunarodnaja Konferencija

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Theoretical and experimental study of a method for the protection of spacecraft from high–speed particles

Cited by 22 publications

References 6 publications

Probabilistic approach in modelling dynamic fracture problems

Probabilistic approach in modelling dynamic fracture problems

A probabilistic approach to modeling collisions with thin barriers

JeKSPERIMENTAL''NYE ISSLEDOVANIJa PROChNOSTI JeLEMENTOV KOSMIChESKOJ TEHNIKI PRI VOZDEJSTVII MELKIH FRAGMENTOV KOSMIChESKOGO I TEHNOGENNOGO MUSORA

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