Abstract
A numerical study is presented that simulates small punch creep (SP-C) tests using a finite-element method (FEM). The objective of the present study is to develop a miniaturized testing methodology for high-temperature creep properties. The numerical simulations have been shown to produce deflection versus time curves that are quantitatively similar to the experimental results obtained on tungsten-alloyed 9 % Cr ferritic steels. It is also demonstrated that the numerically predicted curves show the steady state (secondary) creep stage. Furthermore, the numerical simulations reveal that the magnitude of the equivalent stress in the central region of the SP-C specimen shows no significant change with respect to time at the secondary creep stage, supporting the use of the present SP-C testing method to characterize the secondary creep deformation rate. Finally, an approximate equation is proposed for the assessment of the equivalent stress in the SP-C specimen in terms of the load and testing parameters.
Keywords:
creep properties, creep tests, equivalent stress, finite-element analysis, small punch creep testing
Paper ID: JTE12250
DOI: 10.1520/JTE12250
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Author Zhai, PC Affiliation Fracture Research Institute, Tohoku University, Sendai, Japan and State Key Laboratory for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, China
Author Hashida, T Affiliation Fracture Research Institute, Tohoku University, Sendai, Japan
Author Komazaki, S Affiliation Department of Materials Science and Engineering, Muroran Institute of Technology, Hokkaido, Japan
Author Zhang, QJ Affiliation State Key Laboratory for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, China
Author Zhai PC, Hashida T, Komazaki S, Zhang QJ
Title Numerical Analysis for Small Punch Creep Tests by Finite-Element Method
Symposium ,
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