Study of compressive strength of SiC in impact experiments with divergent flow

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The axisymmetric divergent flow was generated in SiC samples by impact of convex copper flyer plates (radius of curvature ranging from 88 to 550 mm) having velocities from 550 to 700 m/s. The sample-window (sapphire) interface velocities or the velocities of the free surface of the nickel witness plate were continuously monitored by VISAR. The maximum shear stress achieved under different confining stress just prior to the sample failure is associated with the compressive failure threshold of the SiC. Both the compressive failure threshold of SiC and the parameters of its inelastic deformation were found by matching the results of the AUTODYN-2D numerical simulation with the experimentally obtained waveforms. The compressive failure threshold of SiC is characterized by a transition from brittle-like behavior below the confining stress of 1.4-1.5 GPa to the ductile-like one at higher confining stress.

Original languageEnglish
Title of host publicationShock Compression of Condensed Matter - 2009 - Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
Pages989-992
Number of pages4
DOIs
StatePublished - 1 Dec 2009
EventConference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, 2009 APS SCCM - Nashville, TN, United States
Duration: 28 Jun 20093 Jul 2009

Publication series

NameAIP Conference Proceedings
Volume1195
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceConference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, 2009 APS SCCM
Country/TerritoryUnited States
CityNashville, TN
Period28/06/093/07/09

Keywords

  • AUTODYN simulations
  • Brittle failure threshold
  • Divergent flow
  • Silicon carbide

ASJC Scopus subject areas

  • General Physics and Astronomy

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