Study On Mechanical Properties Of Ceramic Foams And Application In Defense Works

On background of the development of multi-layered defense works, introduced concepts and research situation of foamed materials which are quickly developed, and research situation of the invention, development, preparation techniques, mechanical properties and application in field of defense works of ceramic foam was specially focused.Aimed to obtain the static and dynamic compressive property of ceramic foam, quasi-static one-dimension stress compression experiment, quasi-static one-dimension strain compression experiment and dynamic one-dimension stress compression experiment were conducted for a new kind of closed-cell clay ceramic foam, due to its good performance in energy-absorption, anti-blasting and potential prospect in engineering. Stress-strain curves of the foamed ceramic at three different loading conditions described as above were obtained and the strength, deformation, and failure behavior were discussed. It is indicated that the foamed ceramic is a strain rate sensitive material and the irreversable defoemation following with the pore collapse in a loading-unloading cycle is the basic reason for the strong energy absorption of the stress waves.Shelly cellular material is a kind of new protective material devoloped with the energy absorption characteristics of both the cellular material and shell structre. A new kind of protective material was developed by organically combining the closed-cell cramic foam and shelly cellular material. It was used in the distribution layer on the background of layered defense works. The effect on anti-blast and energy absorption of the shelly cellular balls by ceramic foam was analyzed comparing with the sand through field scale explosive experiments. The result showed that the shelly cellular material is more superior than the sand.