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Volume 42 Issue 7
Jul.  2016
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Journal of Beijing University of Aeronautics and Astronautics  > 2016  >  42(7): 1461-1468.
Gao Jinhai, Wang Jianjun, Ma Yanhong, et al. Numerical simulation of three dimensional wall temperature of combustor liner based on thermal-fluid-solid coupling method[J]. Journal of Beijing University of Aeronautics and Astronautics, 2011, 37(3): 300-304. (in Chinese)
Citation: LIU Hu, LIU Hua, YANG Jialinget al. Theoretical model for a porous projectile striking on flat rigid anvil[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(7): 1461-1468. doi: 10.13700/j.bh.1001-5965.2015.0471(in Chinese)
shu

Theoretical model for a porous projectile striking on flat rigid anvil

doi: 10.13700/j.bh.1001-5965.2015.0471

  • School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

  • Received Date: 14 Jul 2015
  • Publish Date: 20 Jul 2016
    Abstract
  • Taylor impact is often applied to the determination of the dynamic yield stress of materials. For theoretical analysis of the Taylor impact of porous projectiles, the relationship between the density of a compressed porous projectile and the compressive plastic strain is very important. This paper proposes an exact density model for the compressible porous projectile by inducing the plastic Poisson's ratio, and further, an analytical model is established for the compressible porous projectile striking on a flat rigid anvil. As the plastic Poisson's ratio is a constant, the first order Taylor series expansion of the compression density ratio model can be reduced to the existing model. As the plastic Poisson's ratio is a function of the compressive plastic strain and the relative density, the relative density has a major influence on the impact response and the final deformation of the projectile, but the duration of impact-contact process is almost unaffected. The initial velocity of the projectile has considerable effects on both the final deformation of the projectile and the duration of impact-contact process. The present theoretical model is useful in analyzing the dynamic behavior of porous materials.

     

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    • References(15)
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