Indentation process of the Rockwell diamond indenter pressing into inelastic material is studies for the analysis, simulation and prediction of Rockwell hardness tests. The geometrical characteristics of the cone-spherical-shaped Rockwell indenter are discussed and fit into a general function in a self-similarity way. The complicated moving boundary problem in Rockwell hardness tests is simplified to an intermediate station one for a flat die indenter by using principles of similarity and cumulative superposition approaches. This method is applied to both strain hardening and strain rate dependent materials. The effects of different material properties and indenter geometry on the indentation depth are discussed. The finite element method is used to simulate the indenter geometric parameter effects on the indentation process.
Citation: Journal of Research (NIST JRES) -
Volume: 107 No. 5
NIST Pub Series: Journal of Research (NIST JRES)
Pub Type: NIST Pubs
analytical modeling, cumulative superposition, diamond indenter, FEA, finite element analysis, indentation, Rockwell hardness, self-similarity