Scaling relationships in indentation of power-law creep solids using self-similar indenters

We use dimensional analysis to derive scaling relationships for self-simila r indenters indenting solids that exhibit power-law creep. We identify the parameter that represents the indentation strain rate. The scaling relation ships are applied to several types of indentation creep experiment with con stant displacement rate, constant loading rate or constant ratio of loading rate over load. The predictions compare favourably with experimental obser vations reported in the literature. Finally, a connection is found between creep and 'indentation-size effect' (i.e. changing hardness with indentatio n depth or load).