A fully implicit plasticity model for the characterization of ceramics in ballistic protection
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.
Mechatronics, Mechanics & Materials
To reference this document use:
EBP - Explosions, Ballistics & Protection
TS - Technical Sciences
Defence, Safety and Security
22nd Technical Meeting DYMAT 'Experimental Testing and Modelling of Brittle Materials at High Strain-Rates', Grenoble, France, 19-21 October 2016, 17-22