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Chinese Journal of High Pressure Physics  > 2010  >  24(4): 248-254 .
WANG Yong-Gang, LIU Hong-Wei. Dynamic Behavior of Void Growth in Aluminum with a Preexisting Flaw under Intense Impact Loading[J]. Chinese Journal of High Pressure Physics, 2010, 24(4): 248-254 . doi: 10.11858/gywlxb.2010.04.002
Citation: WANG Yong-Gang, LIU Hong-Wei. Dynamic Behavior of Void Growth in Aluminum with a Preexisting Flaw under Intense Impact Loading[J]. Chinese Journal of High Pressure Physics, 2010, 24(4): 248-254 . doi: 10.11858/gywlxb.2010.04.002
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Dynamic Behavior of Void Growth in Aluminum with a Preexisting Flaw under Intense Impact Loading

doi: 10.11858/gywlxb.2010.04.002

  • Mechanics and Materials Science Research Center, Ningbo University, Ningbo 315211, China

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  • Corresponding author: WANG Yong-Gang
  • Received Date: 19 Jun 2009
  • Rev Recd Date: 16 Sep 2009
  • Publish Date: 15 Aug 2010
    Abstract
  • By means of the explicit nonlinear dynamic finite element computer code LS-DYNA, the nucleation and growth of void in aluminum with a preexisting flaw under plate impact loading have been investigated. The results are as follows: firstly, the void nucleation occurs from the boundary of the preexisting flaw and the ductile matrix, and once the voids have been nucleated, they grow linearly through the localized plastic deformation; secondly, the growth rate of void radius increases linearly with the shock loading amplitude; thirdly, the yield strength and the size of the preexisting flaw have an obvious influence on the relative growth rate of void; finally, if the threshold stress of the void growth is set as 3.5 times of the yield strength, the simulation results agree reasonably well with the theoretical results, which is helpful for the further understanding of the void growth dynamic behavior.

     

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