Volume 36 Issue 6
Jun.  2021
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ZHANG Jiye, XU Jinsheng, HAN Feng, WANG Shixin. Constitutive model of N15 solid propellant considering confining pressure effect[J]. Journal of Aerospace Power, 2021, 36(6): 1335-1344. doi: 10.13224/j.cnki.jasp.2021.06.022
Citation: ZHANG Jiye, XU Jinsheng, HAN Feng, WANG Shixin. Constitutive model of N15 solid propellant considering confining pressure effect[J]. Journal of Aerospace Power, 2021, 36(6): 1335-1344. doi: 10.13224/j.cnki.jasp.2021.06.022
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Constitutive model of N15 solid propellant considering confining pressure effect

doi: 10.13224/j.cnki.jasp.2021.06.022
  • 1.

    School of Mechatronical Engineering,Beijing Institute of Technology,Beijing 100081,China

  • 2.

    School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China

  • 3.

    The 713 Research Institute,China State Shipbuilding Corporation Limited,Zhengzhou 450015,China

  • Received Date: 2020-09-18
  • Publish Date: 2021-06-28
    Abstract
  • Mechanical properties of N15 solid propellant under different confining pressures were obtained by using the confining pressure test system. Result showed that the initial modulus of the propellant did not change with the confining pressure, but the maximum tensile strength, rupture strength, the maximum elongation and elongation at break increased with the increase of confining pressure; combined with propellant’s mesoscopic structure and cross section analysis, the mechanical mechanism of confining pressure effect on the propellant was revealed preliminarily; as a result of the existence of confining pressure, the particle dewetting inside the propellant was reduced, the holes’ propagation delayed due to the pressure, and its crack extension and germination was inhibited, which proved that the confining pressure had strengthening effect for propellant; according to the elastic-viscoelastic correspondence principle, a constitutive model considering the confining pressure effect was established for N15 propellant. The results showed that accuracy of the constitutive model was good, and it can describe the influence of confining pressure on the mechanical properties of N15 propellant accurately.

     

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