| Autor: |
Modin, I. A., Kochetkov, A. V., Leontiev, N. V. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2019, Vol. 2116 Issue 1, p270003-1-270003-4, 4p, 1 Color Photograph, 3 Diagrams, 2 Graphs |
| Abstrakt: |
Bulk layers of metal balls are used as damping elements, protecting the structure from impulsive influences. Previously obtained experimental diagrams are non-linear and irreversible. Numerical modeling of the quasistatic and dynamic compression of a symmetrical fragment of a granular layer for one of the variants of regular packing of lead balls - cubic packing. The contact three-dimensional problem was solved by the finite element method using the multilinear plasticity model with kinematic hardening. Dynamic compression was carried out by an absolutely rigid plane, moving at a constant speed for a given interval of time. The behavior of the obtained numerical compression diagrams corresponds qualitatively to the behavior of the experimental ones. It is shown that two main factors exert a significant influence on the difference in the behavior of quasistatic and dynamic diagrams of deformation of a porous layer: a limited time of action of the loading pulse in the dynamic regime and a difference in the dynamic diagram of the deformation of the base material from the quasistatic diagram. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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