含孔隙富铝聚四氟乙烯/铝含能材料冲击温升规律

In order to obtain the influence of porosity on the temperature rise effect of aluminum-rich PTFE/Al energetic materials, an one-dimensional viscoplastic cavity collapse model considering the melting effect is used to theoretically analyze the impact temperature rise of the material. A micro-discrete model of aluminum-rich PTFE/Al with porosity of 10%, 20%, and 30% was established, and the numerical simulation was performed with the help of AUTODYN nonlinear dynamic finite element software to analyze the pore compression and temperature rise of porous aluminum-rich PTFE/Al energetic materials under impact loading. In addition, the numerically simulated result was validated through a split Hopkinson pressure bar (SHPB) experiment. The results show that the internal temperature of the material generally increases intermittently with the periodic loading of the incident bar; during the compression process, the temperature rise of porous aluminum-rich PTFE/Al energetic materials is mainly affected by the hole inner diameter velocity ȧ and the yield strength Y; compared with 20% and 30% porosity aluminum-rich PTFE/Al energetic materials, the 10% porosity aluminum-rich PTFE/Al energetic materials have the highest temperature rise during material compression.