Izvorni znanstveni članak
Numerical simulations of normal and oblique impact on single and double-layered aluminium Al6061-T6 plates
Sina Amiri
; Politecnico di Milano, Department of Mechanical Engineering, Via la Masa 1, 20156 Milano, ITALY
Massimo Fossati
; Politecnico di Milano, Department of Mechanical Engineering, Via la Masa 1, 20156 Milano, ITALY
Andrea Gilioli
; Politecnico di Milano, Department of Mechanical Engineering, Via la Masa 1, 20156 Milano, ITALY
Andrea Manes
; Politecnico di Milano, Department of Mechanical Engineering, Via la Masa 1, 20156 Milano, ITALY
Marco Giglio
; Politecnico di Milano, Department of Mechanical Engineering, Via la Masa 1, 20156 Milano, ITALY
Sažetak
Studies of ballistic penetration into metal plates and their numerical simulation currently present an important topic in ballistics, however, no congruent results have been presented so far, especially when it comes to impacts on multi-layered plates. Presently, as far as ballistic limits are concerned, the choice between layered and monolithic structures is not completely straightforward and unproblematic. The effect of introducing air gaps between metallic layers is not fully understood and explained either. Furthermore, these issues are more investigated for normal impacts than for oblique impacts for which only limited results are available. Therefore, the aim of this paper is to conduct a numerical analysis in order to evaluate the effect on the ballistic limit on layered targets for both normal and oblique impacts. A validated numerical methodology will be used, though validated with a limited number of experiments. The target material is an Al6061-T6 aluminium alloy the mechanical behaviour of which (hardening, strain rate, failure, etc.) is already known and described. Several configurations will be numerically tested and the results critically evaluated.
Ključne riječi
normal impact; oblique impact; numerical simulation; double-layered; air gap; LS-DYNA
Hrčak ID:
184918
URI
Datum izdavanja:
23.1.2014.
Posjeta: 468 *