3D numerical research of railgun gouging mechanism based on material point method

Wu Jinguo; Lin Qinghua; Wan Gang; Jin Yong; Li Haiyuan; Li Baoming

doi:10.11883/1001-1455(2017)02-0307-08

Volume 37 Issue 2

Mar. 2017

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Wu Jinguo, Lin Qinghua, Wan Gang, Jin Yong, Li Haiyuan, Li Baoming. 3D numerical research of railgun gouging mechanism based on material point method[J]. Explosion And Shock Waves, 2017, 37(2): 307-314. doi: 10.11883/1001-1455(2017)02-0307-08

Citation:

Wu Jinguo, Lin Qinghua, Wan Gang, Jin Yong, Li Haiyuan, Li Baoming. 3D numerical research of railgun gouging mechanism based on material point method[J]. Explosion And Shock Waves, 2017, 37(2): 307-314. doi: 10.11883/1001-1455(2017)02-0307-08

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3D numerical research of railgun gouging mechanism based on material point method

doi: 10.11883/1001-1455(2017)02-0307-08

National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

Received Date: 2015-07-07
Rev Recd Date: 2016-02-29
Publish Date: 2017-03-25

Abstract

Abstract

Based on the structural features of the railgun and the theories of impact thermodynamics, a 3D gouging model containing a micro particle was established using the material point method to simulate the formation process of the rail gouging, and the gouging mechanism and some influencing factors were also analyzed. The results show that the local impact between the armature and the rails at a high velocity produces transient energy exchanges, thus simultaneously forming metal flows with high energy and high pressure that penetrate obliquely into the rail and cause the formation of gouging, for which there is a threshold velocity to produce. As the armature velocity increases, the gouging damage gets more serious. On the other hand, the galling damage occurs when the armature velocity is below the threshold velocity. Both controlling the particle size within a certain range and increasing the head angle of the armature will help to suppress the formation of gouging.
- impact dynamics,
- material point method,
- railgun,
- gouging,
- hypervelocity

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References(15)

References

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