A fully implicit plasticity model for the characterization of ceramics in ballistic protection
conference paper
The Johnson-Holmquist-2 ceramic model is used for quasi-static indentation simulation. A modification is proposed to an associated plasticity formulation. This allows for a fully implicit solution scheme, where dilatation is used instead of the traditional explicit bulking formulation. Dilatation is shown to have an important influence on ring-crack formation during indentation. A mesh refinement study is performed to show the current tensile failure behaviour leads to meshdependent results.
TNO Identifier
573116
Source title
22nd Technical Meeting DYMAT 'Experimental Testing and Modelling of Brittle Materials at High Strain-Rates', Grenoble, France, 19-21 October 2016
Pages
17-22
Files
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