Modeling the Accumulation of Damage in the Alloy IN738LC

This study models the mechanical behavior of the IN738LC alloy and develops new methods for identifying material parameters. A new phenomenological model is presented that accounts for combined plasticity and creep under cyclic loading. The model includes nonlinear kinematic hardening, power-law creep, and damage accumulation rules. The model is calibrated using a three-step procedure, showing good agreement with actual experimental data. Additionally, an advanced calibration method is demonstrated that accounts for variability in experimental data from sample to sample.