The Behavior Of Aluminum Honeycomb Under Static And Dynamic Compression

Abstract:Aluminum honeycomb, as a kind of honeycomb shape similar to the nature of the porous materials, has the characteristics of light weight, high specific strength and specific stiffness, sound insulation, vibration isolation. Especially the deformation of the special model under compressing along normal direction, it can absorb a lot of energy through the plastic deformation of honeycomb cell wall. It has been plentifully used in packaging, preservation and structure internal filling and military engineering. In the application, the honeycomb usually under out of plane load, the research about the behaviour of honeycomb under out of plane compression have guiding significance to practical engineering application. So the behaviour of aluminum honeycomb under static and dynamic compression is investigated with experimental and numerical methods in this paper. The main conclusions are as follows:(1) The behavior of aluminum honeycomb under static and dynamic compression, the stress-strain curve of the process can be characterised by a steep elastic region up to compressive strength, a plateau collapse region up to densification, and a densification region with a sharp increase of force over displacement.(2) The substrate material, relative density and height of aluminium honeycomb has a great influence on the plateau stress, but the panel thickness has less influence. Under static and dynamic compression, the densification strain is above60%. the densification strain is strongly related to the relative density of aluminium honeycomb.(3) Compared the plateau stress between static and dynamic compression with three specifications of aluminum honeycomb, the plateau stress is strain-rate sensitive. The strength of aluminum honeycomb is increased. This is possible affected by material properties perforated parameters-air compression feature.(4) The finite element array model of aluminium honeycomb with relative density (p)0.05,0.6and0.061is created by the software of ANSYS. The behaviour of honeycomb under20m/s velocity compression is analyzed. The simulation results are validated with the deformation profiles of the dynamic compression in experiments.