Experimental Study on Ratcheting Behavior of SS۳۱۶ Stainless Steel under Uniaxial CyclicLoading

In this study, the ratcheting behavior of SS۳۱۶stainless steel is investigated experimentally underuniaxial cyclic loading at room temperature. Theexperimental tests were carried out by an INSTRONservo-hydraulic machine. The ratcheting strains weremeasured for various loading conditions in order toevaluate the impact of mean stress, stress amplitude andstress ratio on ratcheting behavior. The experimentalresults showed that the ratcheting strain increased withincreasing mean stress, stress amplitude and stress ratio.Moreover, the effect of stress amplitude on ratchetingbehavior is more significant than the effects of meanstress. Finally, the contribution of the mode of controlwas studied in order to find out the role of ratcheting incyclic inelastic accumulation. It was found out that, thecontinuous increase of true stress during the cycles mayhave a significant role in the cyclic growth of inelasticstrain.

کلیدواژه ها:

Ratcheting ، Experimental ، SS۳۱۶stainless steel ، Uniaxial cyclic loading.