Piezoelectric response of energetic composites under an electrostatic excitation

Several high-explosive (HE) crystals are known to be piezoelectric. However, no systematic study has been carried out on how this effect can utilized. In paper, we report the results of an analysis response composites consisting HE and a polymeric binder under electrostatic excitation. The considered 1,3,5-trinitroperhydro-1,3,5-triazine, octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine, pentaerythritol tetranitrate, ammonium perchlorate. To explore avenues for enhancing piezoelectric effect, is taken polyvinylidene fluoride. focus distributions induced electric field vector mechanical stress in microstructures. effects crystal–binder volume fraction, crystal size, dielectric constants investigated. further microparticles lead zirconate titanate ceramic introduced some For here, coupled electromechanical shows that microstructural heterogeneities enhance local fields as high 1.34 times applied E-field, causing breakdown strength overall composite much lower than strengths constituents microstructure. addition, levels just prior well below yield respective constituents. As such, controlled breakdown, rather damage, should primarily used facilitate hotspot formation, ignition, chemical reaction. likelihood within systematically quantified function field, attributes, constituent behavior. gauge direct one material case also subjected excitation form compression. Under external stress, show yielding thereby serve generation mechanism. On other hand, E-field weak unlikely practical or efficient means effecting hotspots energetic material. points simultaneous application considered.