A Modified Set of Constitutive Models for Polymer‐Bonded Explosives that Consider Heterogeneity of Initial Cracks and Failure of Damaged Granules

AbstractNon‐shock ignition of explosions in solids by dynamic loading is a key topic in the field of explosives safety research. Cracks and other damage in polymer‐bonded explosives greatly affect non‐shock ignition. In this study, we developed a modified set of constitutive models that incorporate heterogeneity of initial cracks and failure of damaged granules, both of which can affect the thermodynamic response and non‐shock ignition of condensed explosives. Moreover, the models were used to predict the distribution of cracks and damage under dynamic compression. The calculated results were in good agreement with experiment, which confirmed the validity of the models.