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Failure mode transition in ceramics under dynamic multiaxial compression

Chen, W. and Ravichandran, G. (2000) Failure mode transition in ceramics under dynamic multiaxial compression. International Journal of Fracture, 101 (1-2). pp. 141-159. ISSN 0376-9429. doi:10.1023/A:1007672422700.

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An experimental technique based on the Kolsky pressure bar has been developed to investigate the behavior of ceramics under dynamic multiaxial compression. Experimental results for aluminum nitride (AlN), together with data available in the literature, indicate that a Mohr-Coulomb criterion and the Johnson–Holmquist model fit the experimental data for failure in a brittle manner, whereas the ceramic material exhibited pressure insensitive plastic flow at high pressures. A failure surface is constructed which represents the material failure behavior, including brittle failure, brittle/ductile transition and plastic flow, under various pressures. The effect of various material properties on the failure behavior was investigated. The Poisson's ratio is found to be a measure of brittleness for ceramic materials with low spall strength under shock wave loading conditions. Lower value of Poisson's ratio indicates that the material will fail in a brittle manner through axial splitting even under uniaxial strain loading; whereas materials with higher Poisson's ratio may be expected to deform plastically beyond the Hugoniot Elastic Limit (HEL). The applicability of the proposed failure surface to a range of ceramics is explored and the limitations of the model are outlined.

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Ravichandran, G.0000-0002-2912-0001
Additional Information:© 2000 Kluwer Academic Publishers. Received 28 April 1999; accepted in revised form 25 June 1999. The authors acknowledge the support of the Army Research Office (DAALO3-02-G-0192), the National Science Foundation (CMS-9157846) and the Dow Chemical Company for this research. Many helpful discussions with Dr. D.E. Grady are gratefully acknowledged.
Funding AgencyGrant Number
Army Research Office (ARO)DAALO3-02-G-0192
Dow Chemical CompanyUNSPECIFIED
Subject Keywords:Ceramics, dynamic fracture, brittle/ductile transition, failure surface, aluminum nitride, multiaxial compression
Issue or Number:1-2
Record Number:CaltechAUTHORS:20150227-100305045
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Official Citation:Chen, W. & Ravichandran, G. International Journal of Fracture (2000) 101: 141.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55332
Deposited By: Cheryl Gause
Deposited On:27 Feb 2015 23:36
Last Modified:10 Nov 2021 20:44

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