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The numerical analysis of dynamically loaded ceramic: A crack softening approach

By P. J. Hazell and M. J. Iremonger


A physically based crack softening approach to modelling the failure of brittle materials that have been subjected to dynamic loading is presented and applied to a two-dimensional non-linear transient dynamic hydrocode. It is assumed that there are a number of evenly distributed and orientated micro flaws within the brittle material that are activated by a dynamically applied stress. Modes I and II stress intensity factors are calculated and compared to critical values, at which point the cracks grow at a velocity dependent on mode I stress intensity factor. The strength of the ceramic is degraded according to the length of the cracks. A simulation of a steel sphere impacting and penetrating a ceramic target at 1500 m/s is presented. Comparisons are drawn from experimental data

Topics: crack-softening, hydrocode, dynamic, failure, ceramic, strength loss
Publisher: John Wiley & Sons, Ltd
Year: 2000
OAI identifier:
Provided by: Cranfield CERES

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