Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.ipa.nw.ru/PAGE/EDITION/transaction/tbook/216.htm
Дата изменения: Unknown
Дата индексирования: Tue Oct 2 09:34:28 2012
Кодировка:
Поисковые слова: п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п
Keywords_216
Hydrocode Modeling of a High-velocity Impact of an Asteroid Particle on a Steel Surface
N. A. Makhutov, Yu. G. Matvienko, M. A. Bubnov
A. A. Blagonravov Mechanical Engineering Research Institute of RAS, Moscow, Russia
Abstract:
Present work deals with physical-mathematical modeling of hyper-velocity impacts up to 80 km/s. This problem is very important for asteroid protection systems and other critical nuclear and military objects.
The main method of solution of this problem is numerical modeling. As a result of modeling, new models and criteria of extreme states of solids will be developed to describe hyper-velocity impacts.
A problem is solved with an arbitrary Lagrangian-Eulerian algorithm (ALE). The LS-DYNA 3D hydrocode was used. The material behavior has been defined by a linear-polynomial model with phase transformations.
The impact process was finished after 10 μs. The results of mo-deling describe a physical picture of deformation and fracture under hyper-velocity impacts as well as parameters of the produced crater.

Key words:
Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), high-velocity impact of an asteroid particle on a steel surface, hydrocode modeling, physical-mathematical modeling of hyper-velocity impacts, asteroid protection systems, critical nuclear and military objects, numerical modeling, criteria of extreme states of solids, Lagrangian-Eulerian algorithm (ALE), LS-DYNA 3D hydrocode, a linear-polynomial model with phase transformations, a physical picture of deformation and fracture under hyper-velocity impacts, parameters of the produced crater.