Creep Prediction From Stress Relaxation Coupled With Equivalent Relaxation Rate

Jin Quan Guo; Wu Zhou Meng; Fei Li; Li Xin Wang

doi:10.4028/www.scientific.net/AMM.644-650.1382

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 644-650Creep Prediction From Stress Relaxation Coupled...

Creep Prediction From Stress Relaxation Coupled With Equivalent Relaxation Rate

Abstract:

Several stress relaxation and creep tests of high temperature material are performed. According to the characteristics of stress relaxations and the superposition equation of diffusion and Maxwell equations of two stages, equivalent relaxation time and equivalent relaxation rate are proposed. Considering equivalent relaxation rate as the creep rate under constant stress, the relaxation-creep conversion model is built up and presented. Then the steady-state creep curve and creep rate are calculated. The results show that the numerical results are in good agreement with the experimental data. It indicates that equivalent relaxation rate can be employed for the analysis of steady-state creep rate. The conversion model and method can be used to design the creep strength and predict the life of the component at high temperature.

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Periodical:

Applied Mechanics and Materials (Volumes 644-650)

Pages:

1382-1385

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.644-650.1382

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Online since:

September 2014

Authors:

Jin Quan Guo*, Wu Zhou Meng, Fei Li, Li Xin Wang

Keywords:

Conversion Model, Creep Prediction, Equivalent Relaxation Rate, Stress Relaxation

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* - Corresponding Author

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