Coupled damage-plasticity modeling of the inelastic behavior of C45 steel at high temperatures

Abstract eng:
A series of tensile tests are conducted on C45 steel at a range of temperatures between 298 OK and 923 OK and strain rates up to 0.15s]. Scanning electron microscopy images are also taken to quantify the density of cracks and voids of each fractured specimens which are then utilized to define the evolution of internal defects. A microstructure-based yield surface and an energy-based damage model were utilized and incorporated into a thermodynamic consistent formulation to accurately describe the coupled damage-plasticity behavior of C45 steel at high temperatures. Good correlation was observed between the model predictions and the experiments.

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