A multiscale high cycle fatigue approach based on shakedown and cohesive zone theories—Application for additive-manufactured 316L steel

A high cycle fatigue (HCF) approach based on shakedown, crystal plasticity and cohesive zone theories is developed for metals. To take into account the effect of localized in grains grain boundaries, elastoplastic models are considered to calculate mechanical responses boundaries at mesoscopic scale, respectively. The Papadopoulos criterion used gauge property grain, a new criterion, shakedown theory as Dang Van proposed assess performance boundary. Based these two criteria, effects dislocation slip dominant crack initiation features 316L steel, explored. validate approach, comparison between properties additive-manufactured (AM) steel manufactured with different process parameters has been carried out. simulation results show very good correlation experimental ones obtained by self-heating method. can be optimize AM respect parameters.