Computational modeling of the forward and reverse problems in instrumented sharp indentation

Elastoplastic properties of ductile materials were studied using computational methods to identify the extent of the properties. Properties were determined from instrumented sharp indentation and to quantify the sensitivity of such extracted properties to variations in the measured indentation data. Strain hardening and Young's modulus were obtained from the maximum load and the initial unloading slopes, and the residual stresses were also extracted. Comprehensive sensitivity analysis was carried out for both forward and reverse algorithms, and computational results were compared with the experimental data for two materials.