Mechanochemical Response of Fluoropolymer-matrix Reactive Materials Subjected to Shock Loading Based on Weak Coupling Trans-scale Method

In order to study the mechanochemical response behavior of PTFE/Al/W fluoropolymer-matrix reactive materials under shock loading, the drop-weight impact test of fluoropolymer-matrix reactive materials is carried out, and a weak coupling trans-scale numerical calculation method is proposed. Based on this method, a trans-scale numerical simulation model is established for the drop-weight impact loading reaction process of macro-meso scale fluoropolymer-matrix reactive material. The mechanochemical response behaviors and impact activation mechanisms of macroscopic and mesoscopic structures of sample in the drop-weight impact test are discussed and analyzed through trans-scale numerical simulation. The results show that the content of W has a significant effect on the impact activation reaction of fluoropolymer-matrix reactive materials, and the impact activation threshold of the reactive materials system decreases with the increase of W content. The weak coupling trans-scale numerical simulation analysis model effectively simulates the mechanochemical response process of fluoropolymer-matrix reactive materials. The X-shaped shear band is the dominant mechanism for the breakage and activation of fluoropolymer-matrix reactive materials, and its formation, evolution and distribution are greatly affected by W content.