Heat generation in an elastic binder system with embedded discrete energetic particles due to high-frequency, periodic mechanical excitation

摘要: High-frequency mechanical excitation can induce heating within energetic materials and may lead to advances in explosives detection defeat. In order examine the nature of this mechanically induced heating, samples an elastic binder (Sylgard 184) were embedded with inert particles placed a fixed spatial pattern subsequently excited ultrasonic transducer at discrete frequencies from 100 kHz 20 MHz. The temperature velocity responses sample surfaces suggest that due frictional effects occurred near resonance 215 kHz. An analytical solution involving heat point source was used estimate rates temperatures particle locations frequency region. Heating located surface above 1 MHz attributed viscoelastic related motion samples. At elevated parameters frequency, ammonium perchlorate cyclotetramethylene-tetranitramine driven chemical decomposition.