Volume 27 Issue 3
Mar 2015
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JING Qiu-Min, WU Qiang, BI Yan, YU Ji-Dong, XU Ji-An. Experimental Study and Numerical Simulation on Deformation of Diamond and Sample under DAC Loading[J]. Chinese Journal of High Pressure Physics, 2013, 27(3): 411-416. doi: 10.11858/gywlxb.2013.03.015
Citation: JING Qiu-Min, WU Qiang, BI Yan, YU Ji-Dong, XU Ji-An. Experimental Study and Numerical Simulation on Deformation of Diamond and Sample under DAC Loading[J]. Chinese Journal of High Pressure Physics, 2013, 27(3): 411-416. doi: 10.11858/gywlxb.2013.03.015

Experimental Study and Numerical Simulation on Deformation of Diamond and Sample under DAC Loading

doi: 10.11858/gywlxb.2013.03.015
  • Received Date: 17 Dec 2011
  • Rev Recd Date: 07 Jun 2012
  • Publish Date: 15 Jun 2013
  • The compression experiment of molybdenum foil combined with finite element modeling calculation reveals the history of elastic deformation of diamond and elastic-plastic deformation of sample in the pressure gradient method used for measurement of yield strength at high pressures. The influence from elastic compression and cupping of diamond on the in situ thickness measurement and pressure profiles of molybdenum foil is analyzed. The results show that the elastic compression of diamond is very small and reasonable to ignore at least below 31 GPa which is the highest experimental pressure. The cupping of diamond is somewhat notable. But the agreement of pressure profiles and their pressure gradients between calculation and experiment indicate no evident change due to the influence of cupping of diamond below 31 GPa. The cupping finally leads to the contact of corners of culets at 60 GPa. The proposals of experimental design are also given to reduce the influence from cupping deformation of diamond at high pressure.

     

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