On material immanent ratchetting of two-phase materials under cyclic purely thermal loading

摘要

The paper analyses specific features of the response of two-phase materials with different thermomechanical properties of the phases to purely thermal cycling. It is shown that even without mechanical loading both shakedown and ratchetting regimes are possible. A short review is given of the phenomena and various models of shakedown and ratchetting under cyclic thermomechanical loading. Three structural models for the description of a special two-phase material, namely the duplex stainless steel, under purely thermal loading are discussed: a simple two-bar model, composite cylinder model and micromechanical finite element models with duplex topologies.