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Simons, E.C. (author), Weerheijm, J. (author), Sluys, Lambertus J. (author)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...conference paper 2016