Investigating projectile penetration of sandwich panels with multiple suppressive cores

摘要

Concrete structures are employed extensively in protective structures. This concept does not guarantee economic benefits to reduce the construction time or cost. An important issue is how the penetration distance will be affected when using sandwich panels with multiple suppressive cores. This paper presents the development of an accurate finite element model using AUTODYN to study the behaviour of different sandwich panels exposed to 23 mm projectile. Concrete and steel are modelled as Lagrangian meshes while air is modelled as Eulerian mesh. Experimental tests and numerical analysis were carried out to examine the penetration depth of the different suppressive cores used. The result of this paper will prove the benefits of using the sandwich panels with multiple suppressive cores in reducing the penetration depth of the 23 mm projectile. Experimental tests will validate the presented models. Further experiments to validate the effect of the steel angles arrangement presented herein will be conducted and reported at a later stage.