Solidrocketpropellant is a kind of high filled granular composite with viscoelastic behavior so that the experimental researches on its fracture are very difficult.
固体火箭推进剂是一种粘弹性高聚物,同时又是颗粒基复合材料。其断裂实验难度较大。
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Solid-fuel rockets, in which the fuel and oxidiser are pre-mixed into a stable, solidpropellant and then packed inside the case of the rocket, are simpler, lighter and relatively safer.