Abstract
Methods are presented for modeling the energy-release rate in condensed explosives withmultiple Lagrange gages in experimental studies of initiation and propagation of detonation. The energy-release rate is calculated with the energy equation and the constitutive relationships obtained by integrating the momentum and continuity equations with the gage records. The difference between using multiple stress gages and multiple particle-velocity gages is discussed. A method is formulated for determining the energy-release rate in shock-initiation experiments with multiple particle-velocity gages and one stress gage when the mechanical equation of state is known. Determination of the energy-release rate in a steady-state wave with two Lagrange gages is discussed and the dependence of the particle velocity-Eulerian distance profile on the variation of reaction rate is considered. A point of inflection in the particle velocity-distance profile of a steady-state wave is shown to be associated with a temperature-dependent reaction rate.
Published Version
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