Multi-function Can Contain Structure Material Impact Compression Feature And Its Reaction Behavior Research

In this dissertation, a research is focus on the dynamic behavior and chemical reaction under shock compression of the multifunctional energetic structural materials (MESMs) by using theoretical analysis and experimental research. Based on the one-dimensional shock wave theory, the shock dynamics and shock-induced reaction dynamics has been used to modeling the temperature controlled shock-induced chemical reaction in MESMs under shock compression. The dynamic response of MESMs under impact loading, the shock temperature rise, the shock-induced chemical reaction and the energy releasing characteristic of typical MESMs were studied emphatically.(1) The Equation of State (EOS) and shock temperature rise of MESMs were studied based on the cold energy mixture theoryThe equation of state of solid mixtures was developed by combining the mixture theory of materials at OK and Born-Meyer potential. Then, the equation of state for porous mixtures was obtained by using equation of state for solid mixtures through isobaric path according to the Wu-Jing model, Carroll-Holts model and thermodynamic relations. The shock temperature of porous MESMs was calculated through isobaric and isochoric path. Dynamic shock response of solid and porous powder mixtures compacted by shock waves has been analyzed based on the mixture theory and Hugoniot for porous materials. The EOS model is tested on both the single-component porous materials such as aluminum2024, copper, iron, the multi-component mixtures such as W/Cu, Fe/Ni and MESMs. It is shown that the theoretical calculations agree well with the corresponding experimental and simulation results. The present model produces satisfactory correlation to the Hugoniot of solid porous mixtures over a wide pressure range. The shock temperature results for solid and porous mixtures are calculated along isobaric and isochoric path. For shock temperature of porous mixtures, the isobaric method can give results precisely.(2) The shock-induced chemical reaction results were obtained through shock-induced reaction dynamicsThe Arrhenius reaction rate and Avrami-Erofeev kinetic models are used to calculate the reaction extent of MESMs under shock compression. Hugoniot curves for the products of the chemical reaction and temperature rise after chemical reaction were calculated, through mixing theory developed by McQueen. The models developed have been validated against the experimental SICR data involving Fe2O3/Al, Al/Ni and Ti/Ni mixtures. It has been shown that the theoretical calculations correlate reasonably well with the corresponding experimental and simulation results. The models presented can be used to predict the reaction results of MESMs over a wide range of pressure satisfactorily.(3) The energy release characteristic of typical MESMs were studied by using a vented chamber calorimetryThe pellets of typical MESMs were synthesized through a certain process. And a sealed test chambers were designed to test the energy release characteristics of MESMs pellets. The pressure traces in the chamber are tested and used to calculate the efficiency of the MESMs pellets. The calculated results were compared to theoretical calculated results. It has been shown that the theoretical calculations correlate reasonably well with the corresponding experimental results.