Dynamic compressibility, shear strength, and fracture behavior of ceramic microstructures predicted from mesoscale models

John D. Clayton, R. Brian Leavy, Reuben H. Kraft

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

Fundamental understanding of dynamic behavior of polycrystalline ceramics is advanced through constitutive theory development and computational modeling. At the mesoscale, microstructures of silicon carbide grains (hexagonal crystal structure) or aluminum oxynitride grains (cubic crystal structure) are subjected to compression or shear at high rates with varying confining pressure. Each grain is resolved by numerous three-dimensional finite elements, and behavior of each grain is modeled using nonlinear anisotropic elasticity. Cohesive fracture models and post-fracture contact are included. Normal and Weibull failure statistics from many simulations are collected and analyzed. Results demonstrate effects of load directionality, confinement, dilatation, elastic anisotropy and elastic nonlinearity, and grain boundary fracture properties on macroscopic (average) failure stresses for loading conditions in the ballistic regime. Predictions demonstrate reasonable agreement with data from macroscopic plate impact, unconfined compression, and flexure experiments.

Original languageEnglish (US)
Title of host publicationShock Compression of Condensed Matter - 2011 - Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
Pages1039-1044
Number of pages6
DOIs
StatePublished - Jun 13 2012
Event17th Biennial Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, 2011 APS SCCM - Chicago, IL, United States
Duration: Jun 26 2011Jul 1 2011

Publication series

NameAIP Conference Proceedings
Volume1426
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other17th Biennial Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, 2011 APS SCCM
CountryUnited States
CityChicago, IL
Period6/26/117/1/11

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science
  • Physics and Astronomy(all)
  • Nature and Landscape Conservation

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    Clayton, J. D., Leavy, R. B., & Kraft, R. H. (2012). Dynamic compressibility, shear strength, and fracture behavior of ceramic microstructures predicted from mesoscale models. In Shock Compression of Condensed Matter - 2011 - Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter (pp. 1039-1044). (AIP Conference Proceedings; Vol. 1426). https://doi.org/10.1063/1.3686456