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Indexed by:会议论文

Date of Publication:2012-03-16

Included Journals:EI、CPCI-S、Scopus

Volume:155-156

Page Number:1107-+

Key Words:Creep rupture property; Reliability design; Rupture allowable stress; Confidence level; Normal distribution

Abstract:The scattering of creep rupture data was represented by Z-parameter method based on Larson-Miller method. It was verified that the values of Z were supported by normal distribution. After obtained the distribution characteristics of creep rupture data using Z-parameter, reliability design for rupture allowable stress was carried out according to design life. Safety factor method is used for safety guarantee in conventional rupture allowable stress design and minimum rupture strength method is used in some standard. In comparison with safety factor method and minimum rupture strength method, it can be seen that reliability design based on Z-parameter is more agree with experimental data than other methods. Reliability design provides more precise results by considering the real distribution of creep rupture property and provides more flexible choice for design due to the need of safety and economy.