Influence mechanism of impact pressure on energy release behavior of high-energy insensitive particle reinforced composites

•Critical initiation pressure of particle reinforced composites is obtained by the design of initiation test.•Particle reinforced composites reaches complete initiation state as the load pressure exceeds 11.95 GPa.•The internal correlation models between energy release behavior and impact load pressure are established. The effect of impact pressure on energy release behavior of high-energy insensitive particle reinforced composites is investigated. The results show that as the impact pressure reaches 5.39 GPa, the high-energy insensitive particulate reinforced composites initiation occurs for the first time. With the increase of the impact pressure, the gas pressure inside the high-pressure explosion chamber increases gradually until the impact pressure increases to 11.95 GPa. The quantitative relationship between impact pressure and energy release behavior is established.