The numerical studies of the multi-stage damage behavior of an explosively-driven HR2 cylinder

The damage in the metallic thick-walled cylinder expanded by explosive load is highly complicated and is particularly important to the design of munitions and armaments. A serial of experiments with different strain rate in steel have been done to explore the fracture behavior in the metallic cylinder [1] ∼ [8]. Figure 1 shows the sketch of the experimental specimen and the field [8]. The experimental results in the Fig. 2 revealed that the shear fracture was dominant while the cylinder deformed at a high strain rate [1], [3]. As the Fig.3, the recovered fragments showed the damage in the cylinder contained many fracture mechanisms such as spallation, tensional fraction and adiabatic shear band [3].The damage in the metallic thick-walled cylinder expanded by explosive load is highly complicated and is particularly important to the design of munitions and armaments. A serial of experiments with different strain rate in steel have been done to explore the fracture behavior in the metallic cylinder [1] ∼ [8]. Figure 1 shows the sketch of the experimental specimen and the field [8]. The experimental results in the Fig. 2 revealed that the shear fracture was dominant while the cylinder deformed at a high strain rate [1], [3]. As the Fig.3, the recovered fragments showed the damage in the cylinder contained many fracture mechanisms such as spallation, tensional fraction and adiabatic shear band [3].