Abstract
In this project, the formation, the fragmentation and the penetration in a plate, of a copper jet that develops in a shaped charge is analysed by numerical simulation. The mechanics of the jet after the collapse of the copper cone, and the development of instabilities that lead to its break-up are not yet fully understood. We have used a finite element lagrangian code to gain insight into this problem. The study is conducted in two dimensions, axisymmetric. An explicit contact/friction algorithm is used to treat multi-body dynamics. A remeshing algorithm is needed to follow the high deformation pattern of the copper jet. The calculations account for rate-dependent plasticity, heat conduction and thermal coupling. A criterion is introduced to model the jet break-up.
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