Plastic energy-based analytical approach to predict the mechanical response of two-phase materials with application to dual-phase steels

A composite made of two phases is considered with a perfect disorder of the phases, and isotropic behavior. The strain hardening behavior of such a composite is modeled under axisymmetric tension. The approach is based on using the strain hardening behavior of the two constituent phases together with a relation between the plastic energy of the two phases. The newly developed analytical model was applied to several dual-phase steel alloys and on iron-silver composite metal. These case studies revealed that the equal-power approach reproduces faithfully the strain hardening behavior of the composite, together with the strain partitioning between the two phases, in good agreement with experiments.

Automated summary

The study focused on the strain hardening behavior of a composite material composed of two phases with perfect disorder and isotropic behavior under axisymmetric tension. The approach utilized the strain hardening behavior of the two constituent phases and their relationship in plastic energy. Results from case studies on dual-phase steel alloys and iron-silver composite metal demonstrated that the equal-power approach accurately reproduced the strain hardening behavior and strain partitioning between the two phases in agreement with experimental data.