Trans-scale study on the thermal response and initiation of ternary fluoropolymer-matrix reactive materials under shock loading

To investigate the thermal response and initiation behavior of ternary fluoropolymer-matrix PTFE/Al/W reactive materials, a research combining shock loading tests and trans-scale modelling is conducted. On the basis of a good agreement of the numerically simulated and tested shock wave propagation, the significant impact of component ratios and particle sizes on the evolution of mesoscopic temperature, hot-spots and initiation is well characterized and analyzed. Results demonstrate that as the content of W increases, the range of mesoscopic high-temperature area increases and tends to distribute more uniform, while material with smaller W particles causes more intense particle deformation and larger temperature rise. The time to reach the critical temperature shows positive correlation to the content of W, while the critical temperature of hot-spots shows negative correlation to the particle size of W. For PTFE/Al/W of high density, with the increase of W particle size, the reaction rate decrease, however the time to reach the peak reaction rate shortens.