IDENTIFICATION OF MACROSCOPIC HARDENING LAW THROUGH SPHERICAL INDENTATION: DEFINITION OF AN AVERAGE REPRESENTATIVE STRAIN AND A CONFIDENCE DOMAIN

摘要

The instrumented indentation test is widely used for the identification of the stress-strain curve. One of the disadvantages of the indentation test is that the plastic strain field in the deformed sample is not homogenous which makes it difficult to identify the hardening law of the material from an indentation curve.