The simulations of the void expanding within a material of modest cohesive strength clearly indicate that the pattern (and localization) of damage evolution strongly depends on the annealed disorder on the particle scale. This and another similar simulations demonstrate the potential role of statistical mechanics in general, and particle dynamic simulations in particular, in application to penetration mechanics. All material parameters of the lattice, such as the properties of the lattice links, can be unambiguously identified and determined from the data of simple, static experiments. The determination of parameters related to the microstructural disorder requires the knowledge of the distribution of grain (aggregate) sizes and packing. The model described in this study is intentionally reduced to its most simple form. For example, the deformation of the projectile and the first elastic peak the target resistance neglected at this time. A simple relation between the elastic peak and stagnation levels of radial traction is used to render the model deterministic. The only fitting parameter mu is assumed to be constant. The links properties are defined by a minimum of parameters related to material parameters that can be easily measured in the laboratory.
Penetration of rigid projectiles through quasi-brittle materials
Simulation des Eindringens eines festen Projektils in ein sprödes Material
Transactions of the ASME, Journal of Applied Mechanics ; 66 , 3 ; 585-592
1999
8 Seiten, 9 Bilder, 2 Tabellen, 34 Quellen
Article (Journal)
English
Dehnungsgeschwindigkeit , Eindringen , Eindringtiefe , Hohlraumbildung , Korngrößenverteilung , Körnigkeit , Kristallgitter , Materialfeinstruktur , Materialfestigkeit , mechanischer Widerstand , Partikel , Projektil (Geschoss) , Rissausbreitung , Simulationsmodell , Sprödbruchverhalten , spröder Werkstoff , statistische Mechanik , Struktur (Werkstoff) , Packungsdichte (Partikel) , Spannung-Dehnung unter Druck , Spannung-Dehnung unter Zug
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