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Chinese Journal of High Pressure Physics  > 2011  >  25(1): 1-7 .
ZHOU Zhong-Bin, CHEN Peng-Wan, HUANG Feng-Lei. An Experimental Study on the Micro/Macro Fracture Behavior of PBX Using Digital Speckle Correlation Method[J]. Chinese Journal of High Pressure Physics, 2011, 25(1): 1-7 . doi: 10.11858/gywlxb.2011.01.001
Citation: ZHOU Zhong-Bin, CHEN Peng-Wan, HUANG Feng-Lei. An Experimental Study on the Micro/Macro Fracture Behavior of PBX Using Digital Speckle Correlation Method[J]. Chinese Journal of High Pressure Physics, 2011, 25(1): 1-7 . doi: 10.11858/gywlxb.2011.01.001
shu

An Experimental Study on the Micro/Macro Fracture Behavior of PBX Using Digital Speckle Correlation Method

doi: 10.11858/gywlxb.2011.01.001

  • State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

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  • Corresponding author: CHEN Peng-Wan
  • Received Date: 16 Nov 2009
  • Rev Recd Date: 26 Jan 2010
  • Publish Date: 15 Feb 2011
    Abstract
  • The micro/macro fracture behavior of a polymer bonded explosive (PBX) material was experimentally studied using a semi-circular bend test and digital speckle correlation method (DSCM). Brittle fracture occurred when a semi-circular disc sample of PBX with a preset crack was compressed. The whole strain field and displacement vector plot were obtained using the DSCM, and the plane strain fracture toughness of PBX material was acquired. In addition, real time microscopic examination was conducted to observe the process of deformation and failure of PBX material under semi-circular bend test using a scanning electron microscope (SEM) equipped with a loading stage. The localized damage and its evolution in PBX were obtained by the DSCM, demonstrating possible fracture route of microcracks. The results indicate that DSCM technique is a valid and effective tool to study the deformation and fracture mechanisms of PBX.

     

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