JSME International Journal Series A Solid Mechanics and Material Engineering
Online ISSN : 1347-5363
Print ISSN : 1344-7912
ISSN-L : 1344-7912
Damage & Fracture
Application of a Nonlinear Creep-Fatigue Damage Model to 2 1/4Cr-1Mo Steel
Kasivitamnuay JIRAPONGToshiya NAKAMURAYasuhide ASADA
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2001 Volume 44 Issue 1 Pages 109-116

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Abstract

A nonlinear damage model, previously developed for creep-fatigue life evaluation of Mod. 9Cr-1Mo steel and 316FR stainless steel in a high vacuum environment was applied to 2 1/4Cr-1Mo steel. In the damage model, the damage accumulation process is considered to be composed of three basic processes: fatigue, creep and creep-fatigue. The fatigue damage process consists of a crack initiation period and a crack growth period. The creep damage process consists of nucleation of creep cavities. Damage interaction is fatigue cracks propagate from creep cavities. Application of this damage model to creep-fatigue tests under complex waveforms and complex strain histories showed a good correlation with the experimental results within a factor of 2.

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© 2001 by The Japan Society of Mechanical Engineers
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