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Chinese Journal of High Pressure Physics  > 2014  >  28(2): 129-136.
SUN Zhan-Feng, HE Hong-Liang, LI Ping, LI Qing-Zhong. Experimental Study on the Problem of Failure Wave in AD95 Ceramics[J]. Chinese Journal of High Pressure Physics, 2014, 28(2): 129-136. doi: 10.11858/gywlxb.2014.02.001
Citation: SUN Zhan-Feng, HE Hong-Liang, LI Ping, LI Qing-Zhong. Experimental Study on the Problem of Failure Wave in AD95 Ceramics[J]. Chinese Journal of High Pressure Physics, 2014, 28(2): 129-136. doi: 10.11858/gywlxb.2014.02.001
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Experimental Study on the Problem of Failure Wave in AD95 Ceramics

doi: 10.11858/gywlxb.2014.02.001

  • National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621999, China

  • Received Date: 15 May 2013
  • Rev Recd Date: 22 Jul 2013
    Abstract
  • The free surface velocity profile of AD95 ceramic target was measured through laser interferometry under one-dimensional plane strain shock compression.Whether failure wave happened and its relationship with material property were discussed by the analysis of velocity profile characteristic.In an impact stress range from 4.4 to 7.3 GPa (σHEL is about 5.5 GPa), the free surface velocity profile has no appearance of reload signal, which means that there is no appearance of seriously damaged and fragmentized interface as that observed in glass and rock, like a failure wave.The analysis about the free surface velocity profile indicates that the calculated characterizing time difference is regularly less than the experimental value, and the rising foreland has a dispersive property even though the loading stress is less than σHEL.These findings demonstrate that, to some extent, AD95 ceramics might have produced a certain weak compressive damage at the low-stress region.The fracture toughness is a significant ingredient that affects the failure wave phenomena.Materials with relatively lower fracture toughness are prone to form microcracks extension, connection and finally lead to the serious breakage and shatter into pieces, which means the appearance of failure wave.

     

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