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Acta Armamentarii ›› 2015, Vol. 36 ›› Issue (2): 206-213.doi: 10.3969/j.issn.1000-1093.2015.02.003

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Numerical Research on Rotating Band Engraving Process of a Large-caliber Howitzer

SUN Quan-zhao, YANG Guo-lai, WANG Peng, GE Jian-li, XIE Run   

  1. (School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China)
  • Received:2014-04-29 Revised:2014-04-29 Online:2015-04-07
  • Contact: SUN Quan-zhao E-mail:sunquanzhao@hotmail.com

Abstract: A finite element model of the rotating band engraving into the forcing cone section of gun tube is established to explore the mechanism of engraving process of rotating band of a large-caliber howitzer under launch conditions. The dynamic engraving process of the rotating band is studied through numerical simulation, and the maximum resistance, engraving pressure and projectile velocity at the corresponding time are obtained. The deformation and groove formation processes of the rotating band are analyzed. The dynamic engraving resistance of the rotating band, the engraving pressure and movement of projectile are also calculated. The calculated results show that the rotating band undergoes plastic deformation and material flow, and forms the grooves on it due to ductile fracture, where shear failure is dominant. The rotating band has a layered feature after engraving, and the plastic strain in the band is small. The heat generated by adiabatic deformation of the rotating band is not enough to melt it. The simulation results of the deformation of the rotating band show good agreement with the test data from the recovered projectile.

Key words: ordnance science and technology, engraving of rotating band, deformation of rotating band, engraving resistance, engraving pressure, finite element simulation

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