Abstract:Expanding ring is a useful method to study warhead fragments.The material behavior is studied based on the correction cohesion fracture model through ABAQUS subroutine. The fragmentation process is simulated and obviously divided into four stages; the quality distribution laws and the quantity of fragments influenced by expanding speed are discussed, as well as the fragmentation model affected by the thickness of the ring is studied. Indeed, the fragmentation process started from overall plastic deformation, then steady necking, and then local necking developing, finally fragmentizing. The results have shown that the quantity of fragments would increase with the initial expanding speed and the quality distribution of fragments would obey Rayleigh distribution law; finally the stress state and fragmentation model would be affected by the radius-thickness ratio
李营1,2,吴卫国1,杜志鹏2,张玮2,张春辉2,张磊1. 基于修正BW模型的战斗部爆炸破片形成机理研究[J]. 振动与冲击, 2017, 36(15): 118-123.
Li Ying1,2, Wu Wei-guo1,Du Zhi-peng2, Zhang Wei2,Zhang Chun-hui2,Zhang Lei1. Fragmentation mechanism research of warhead based on modified BW model. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(15): 118-123.
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