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A Study on Parameters Measured during Small Punch Creep Testing

소형펀치 크리프 시험중 측정하는 변수에 대한 연구

  • Published : 2002.01.01

Abstract

An effect is made in this study to deepen understanding of small punch(SP) creep testing which has been a round for about 10 years as a substitute for the conventional uniaxial creep testing. Even though considerable numbers of SP creep test program have been performed, most of the tests were aimed at measuring creep rupture lives only. Very flew studies showed interest on the meaning of what we were really measuring during the SP creep tests. In this paper meanings of the parameters measured during the SP creep testing, such as punch load and punch displacement rate are investigated using finite element analysis. It was shown that the measured parameters must represent the stress and strain rates of the material at the annular region located at about 0.65 mm from the center of the SP specimen. The material in this location would go through constant maximum stress and strain rate during the testing. Experimental verification is also discussed.

Keywords

Creep;Time-Dependent Fracture Mechanics;Small Punch;Power Law Creep;FEA

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Cited by

  1. A Direct Methodology for Small Punch Creep Test vol.56, pp.3, 2016, https://doi.org/10.1007/s11340-015-0108-z