Thermal and mechanical response of PBX 9501 under contact excitation

摘要: The thermal and mechanical responses of a cyclotetramethylene-tetranitramine-based explosive (PBX 9501) two non-energetic mock materials (900-21 PBS under high-frequency excitation are presented. Direct contact ultrasound transducers were used to excite samples through frequency range 50 kHz 40 MHz. response each sample was approximated from receiving transducer trends confirmed via laser Doppler vibrometry. steady-state the measured at discrete frequencies infrared thermography. A maximum temperature rise approximately 15 K observed in PBX 9501, exhibited similar characteristics. Temperature gradients calculated estimate total heat generated within due excitation. active heating mechanisms found be highly dependent on Possible below 1 MHz likely related bulk motion. Above this frequency, particle-scale processes. phenomena may prove useful aid current trace vapor detection methods for explosives.