The dynamic compaction and spall response of a composite solid propellant has been studied by a series of planar light-gas gun impacts. The pressure histories between the propellant and the buffer were measured by manganin gauge. The results show that the fracture of ammonium perchlorate is essential to the growth of fracture and spalls behave in a brittle crack mode for a composite propellant. A simplified dynamic brittle fracture model is pressented for solid propellant. Comparison of numerical and experimental results shows that this new model describes the spallation of solid propellant successfully.
Key words
solid propellant /
damage model /
dynamic fracture
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References
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Footnotes
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