Evaluation of multiaxial creep and damage evolution for small punch creep test considering critical-strain criterion

摘要: Abstract Experiment and finite element analysis were performed in this study to estimate the deformation characteristics of small punch creep test. Considering disadvantage traditional model owing numerous unknown parameters, ductility exhaustion was introduced used damage multiaxial evolution process. The results show that trends deflection strain with three stages are similar. During deformation, apparent localization is observed. maximum also occurred necking region due stress concentration. Thus, a critical value proposed for service-exposed Cr5Mo study. In primary stage, tensile observed at lower surface compression upper surface. Subsequently, triaxiality tends be constant second stage. steady parameters test can replace properties in-service components. Finally, specimen obtained.