Institute of Physics of Materials AS CR, v. v. i. > Projects > Numerical modeling of small punch tests on miniaturized specimens from advanced steels for reliable life-time estimation

Numerical modeling of small punch tests on miniaturized specimens from advanced steels for reliable life-time estimation

InvestigatorIng. Petr Dymáček, Ph.D.
Number of ProjectIAA 200410801
AgencyGrantová agentura Akademie věd České republiky
Duration2007-12-31 - 2010-12-30

Anotace
Small punch tests can be considered one of the promising methods for determination of the residual life of exposed parts of power generation and thermal facilities. Preliminary results demonstrated that these tests represent an apt tool for obtaining local creep properties at operational temperatures. Contemporary used relations between results of conventional and small punch test are mostly empirical. Aim of the project is to include finite element method for the verification of the small punch test application in the assessment of the creep resistance and either the residual or guaranteed life time of advanced steels P91 and P92. Application of various constitutive creep models and selection of the optimal constitutive model will be performed also considering damage modeling. Using these numerical simulations, obtained empirical relations should be verified and the most suitable extrapolation techniques for reliable estimation of long-term creep characteristics determined.