Boris Timofeevich Dobritsa (Bauman Moscow State Technical University) :


Articles:

539.3 Simulation of the interaction process of a high-speed projectile with a three-layer spaced combined barrier

Dobritsa B. T. (Bauman Moscow State Technical University), Pashkov S. V. (Томский государственный университет), Dobritsa D. B. (АО "НПО им. С.А. Лавочкина")


doi: 10.18698/2309-3684-2018-1-7089


The article describes the numerical study of the process of a high-speed projectile interaction with the spaced combined barrier including mesh bumpers which was carried out using the author's numerical realization in a Lagrangian 3D formulation on tetrahedral cells. There was used the deformation fracture criterion for equivalent plastic deformation to calculate contact interactions, the Johnson method and the method of bifurcation on nodes of a computational grid to describe cracks. The boundary condition of ideal sliding on a tangent and impermeability on a normal was used for fragments and contact surfaces. The protective properties of a three-layer spaced barrier with two layers of mesh protection were evaluated in a wide range of impact velocities simulating the effects of micrometeorites and fragments of orbital debris on the structures of spacecraft meteoric protection. High performance of protective mesh bumpers and their advantage in comparison with bulk bumpers are shown. A technique for simulating high-speed impact on the spaced barriers allowing reducing the calculation time for long distances between layers is described.


Добрица Б.Т., Добрица Д.Б., Пашков С.В. Моделирование процесса взаимодействия высокоскоростного ударника с трехслойной разнесенной комбинированной преградой. Математическое моделирование и численные методы, 2018, № 2, с. 70-89.