Simulation Study of Bearing Band Engraving Process and Interior Ballistic Process Based on Thermo-mechanical Coupling FEA Model

doi:10.3969/j.issn.1000-1093.2015.12.007

Abstract

Abstract: In order to study the dynamic interaction process of bearing band and barrel, a thermo-mechanical coupling finite element analysis (FEA) model is established. The engraving process of bearing band and interior ballistic process are simulated by the explicit finite element method with the use of Fortran subroutines. The FEA model is proved to be effective by comparing the calculated results with experimental results. The calculated results show that the coefficient of secondary work varies as a function of time, and an extremum value appears in the early time when using classical interior ballistic equation.The thermal softening of bearing band surface has a significant effect on the interior ballistic process during the band engraving. For fixed cartridge case,the computational accuracy of the engraving process and the interior ballistic process could be improved by taking account of extracting bullet force.

Key words: ordnance science and technology, bearing band engraving, thermo-mechanical coupling, extracting bullet force, finite element method

CLC Number:

TJ410

DING Chuan-jun, ZHANG Xiang-yan. Simulation Study of Bearing Band Engraving Process and Interior Ballistic Process Based on Thermo-mechanical Coupling FEA Model[J]. Acta Armamentarii, 2015, 36(12): 2254-2261.

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