爆炸与冲击2018，Vol.38Issue(4)：749-758,10.DOI:10.11883/bzycj-2016-0389
表面粗糙度对6061铝合金薄壁管冲击膨胀断裂性能的影响
Effect of surface roughness on impact expansion fracture of 6061 aluminum alloy thin-walled cylindrical tube
摘要
Abstract
Dynamic expansion crack freezing recovery tests of 6061 aluminum alloy thin-walled cylindrical tubes with different roughnesses after surface processing were carried out with the split Hopkinson pressure bar experimental technique, and the crack initiation, propagation and final fracture mode of the thin-walled metal cylindrical tubes of dynamic expansion fracture process were studied. The results show that:under the same impact pressure, the greater the surface roughness of the thin-walled metal cylindrical tube, the more prone to the expansion of the material in the process of expanding fracture; the crack initiating on the surface of the outer wall is extended from the outside to the inside, and the crack propagation is mainly affected by the stress state at the crack; the fracture mode is dominated by the tensile and shear fracture mechanism, the fracture mode is a mixed type of tension and shear fracture.关键词
6061铝合金/分离式霍普金森杆/薄壁圆柱管/膨胀断裂Key words
6061 aluminum alloy/split Hopkinson pressure bar (SHPB)/thin-walled cylindrical tube/expansion fracture分类
数理科学引用本文复制引用
刘龙飞,周强..表面粗糙度对6061铝合金薄壁管冲击膨胀断裂性能的影响[J].爆炸与冲击,2018,38(4):749-758,10.基金项目
国家自然科学基金项目(11772127) （11772127）
湖南省科研创新项目(CX2017B634) （CX2017B634）
