On the Parameter Determination of a Stress Relaxation Model Based on Creep Equations Using Differential Evolution Algorithm

Wei Wei Zhang; Hong Xu

doi:10.4028/www.scientific.net/AMM.441.476

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 441On the Parameter Determination of a Stress...

On the Parameter Determination of a Stress Relaxation Model Based on Creep Equations Using Differential Evolution Algorithm

Abstract:

A robust and efficient parameter identification method of the stress relaxation model based on Altenbach-Gorash-Naumenko creep equations is discussed. The differential evolution (DE) algorithm with a modified forward-Euler scheme is used in the identification procedure. Besides its good convergence properties and suitability for parallelization, initial guesses close to the solutions are not required for the DE algorithm. The parameter determination problem of the stress relaxation model is based on a very broad range specified for each parameter. The performance of the proposed DE algorithm is compared with a step-by-step model parameter determination technology and the genetic algorithm (GA). The model parameters of 12Cr-1Mo-1W-1/4V stainless steel bolting material at 550°C have been determined, and the creep and stress relaxation behaviors have been calculated. Results indicate that the optimum solutions can be obtained more easily by DE algorithm than others.

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Periodical:

Applied Mechanics and Materials (Volume 441)

Pages:

476-479

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.441.476

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Online since:

December 2013

Authors:

Wei Wei Zhang, Hong Xu

Keywords:

Creep, Differential Evolution, Parameter Determination, Stress Relaxation

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References

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