Energy Absorption Property Of Composite Metallic Foams

In many engineering applications, in order to prevent the damage caused by impact and vibration, often use energy absorbing material as a protective layer. In a large number of materials to use, foam can use as a buffer with superior performance materials, has won increasingly widespread concern. In this paper, we use squeeze casting method for a new legal system composite metallic foams, the materials from hollow sphere filled aluminum alloy matrix composite based, it is a very broad prospects for application to the energy absorbing and impact protective material.We use theoretical analysis, numerical simulation and experimental methods studied composite metallic foams static and dynamic mechanics response, but also to study the performance of energy absorbing.Quasi-static compression tests and a drop hammer-impact tests were made to different composite metallic foams with different content of hollow sphere, different matrix alloy and heat treatment, received Yang's module volume and yield strength, got stress-stain response curve, calculated the ability and ideal efficiency of energy absorbing, discussed the effect low of different factors on composite material's mechanics response and energy absorbing capacity. Describe the energy absorbing mechanism of composite metallic foams. According to the principle of rigidity equivalent to the composite materials columns specimen must simplify the process of impact damage to the one-dimensional equivalent uniform columns collisions, applicated one-dimensional stress wave propagation theory to describe the destruction process of composite materials columns specimen.Observed different specimen's macroeconomic damage externalities, at the same time relying on the scanning electronic microscope, explored the macroscopical and microcosmic destruction mechanism.Using general FEM software ANSYS, conducted numerical simulation of composite materials static compression tests, established micro-structural composite materials models, received the deformation and stress distribution of materials in static pressure load and the static displacement load.