Correlation of Global Quantities at Material Characterization of Pressure-Sensitive Materials Using Sharp Indentation Testing

Correlation of sharp indentation problems is examined theoretically and numerically. The analysis focuses on elastic-plastic pressure-sensitive materials especially the case when local plastic zone so large that elastic effects mean contact pressure will be small or negligible as for engineering metals alloys. results from theoretical indicate effect pressure-sensitivity strain-hardening are separable at correlation hardness values. This confirmed using finite element methods closed-form formulas presented representing a counterpart to Tabor formula von Mises plasticity. situation relative area more complicated also discussed.