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Acta Armamentarii ›› 2021, Vol. 42 ›› Issue (9): 1847-1857.doi: 10.3969/j.issn.1000-1093.2021.09.005

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Dampling Characteristics of Projectile in Engraving Process of Nylon Sealing Band

CHENG Shenshen, TAO Ruyi, WANG Hao, XUE Shao, LIN Qingyu   

  1. (School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China)
  • Online:2021-10-20

Abstract: A finite element model of the sealing band is established to research the mechanical properties of nylon sealing band of projectile launching from a large-caliber artillery during engraving process and analyze the influences of the the sealing bands with different structures on the engraving process. The pressure field is governed by an internal ballistic program,and the nonlinear mechanical behaviors are predicted based on the engineering software Abaqus. The pressure field and the structures through moving boundaries are coupled by using a user subroutine interface VUAMP in Abaqus. The different bottom radii and the nylon band structures with different widths and grooves were simulated and calculated. The simulated results show the mechanical properties and deformation evolution of band during the engraving process. The calculated results show that the larger the radius of projectile base is, the smaller the deformation space of band is and the greater the engraving resistance is. The sealing performance of band is improved with the increase in its width, but the resistance is also increased gradually. The sealing band groove can effectively change a single section of deformation into a multi-section of deformation, and the change of groove depth has a greater influence on the engraving resistance than the change of groove width.

Key words: artillery, projectile, nylonsealingband, engravingprogress, couplingnumericalsimulation, finiteelementmethod

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