Stress Relaxation Characteristics and Data Utilization

Manjoine, M. J.

doi:10.1007/978-1-4899-1884-0_29

Cited by 3 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although stress relaxation and creep are technically different, it is considered that both are different performances of one identical physical phenomenon [1], and both mechanisms lead to the eventual exhaustion of the ductility [2]. The relationship between the residual stress and time during stress relaxation of various different materials has been derived from the creep equations.…”

Section: Introductionmentioning

confidence: 99%

Parameter Identification of a Stress Relaxation Model Based on Differential Evolution Algorithm

Zhang

2013

AMR

View full text Add to dashboard Cite

In order to determine the parameters of a stress relaxation model based on Altenbach-Gorash-Naumenko creep equations, an efficient parameter identification scheme is discussed. The differential evolution (DE) algorithm is used in the identification procedure with a modified forward-Euler scheme. The model parameters of 1Cr-0.5Mo-0.25V stainless steel bolting material at 500°C have been determined, and the creep and stress relaxation behaviors have been calculated. Comparing with a step-by-step model parameter determination technology and the genetic algorithm (GA), it shows that the DE algorithm has better convergence property and suitability for parallelization, and no need of initial guesses close to the solution. Results indicate that the optimum solutions can be obtained more easily by DE algorithm than others.

show abstract

Section: Introductionmentioning

confidence: 99%

Parameter Identification of a Stress Relaxation Model Based on Differential Evolution Algorithm

Zhang

2013

AMR

View full text Add to dashboard Cite

show abstract

“…Typical in-service conditions in a power plant require the operating temperatures between 400°C and 600°C, which means that the creep or stress relaxation behavior of the components is of primary interest. Although stress relaxation and creep are technically different, it is considered that both are different performances of one identical physical phenomenon [1], and both mechanisms lead to the eventual exhaustion of the ductility [2]. As loadings of creep-fatigue type occur due to the repeated start-stop operations during operation with long holding periods, to investigate the characterization of material behavior under creep-fatigue interaction conditions is essential to the evaluation of actual component life.…”

Section: Introductionmentioning

confidence: 99%

Life Prediction of Two Rotor Steels under Creep-Fatigue Interaction at Elevated Temperature

Zhang

Maile

2013

AMM

View full text Add to dashboard Cite

The fatigue tests with 16 hours hold time have been conducted for two rotor steels, 1CrMoV and 2CrMoNiVW at 550°C to investigate their creep-fatigue interaction behaviors, as well as those without hold time for contrast. And two life prediction methods are used to correlate the present creep-fatigue life data. It is shown that a significant reduction in fatigue life is observed with hold time in tension, and it is also observed that 1CrMoV steel exhibits a higher creep-fatigue life than 2CrMoNiVW when strain hold time is 16 hours, and 2CrMoNiVW seems to be more sensitive to hold time influence. In addition, both methods could give satisfactory creep-fatigue life predictions, but with their own limitations.

show abstract

Improvements on Resistance to Stress Relaxation of Low Carbon Martensite

Yonghe¹,

Zhiqiang²

1992

Mechanical Behaviour of Materials VI

View full text Add to dashboard Cite

Stress Relaxation Characteristics and Data Utilization

Cited by 3 publications

References 7 publications

Parameter Identification of a Stress Relaxation Model Based on Differential Evolution Algorithm

Parameter Identification of a Stress Relaxation Model Based on Differential Evolution Algorithm

Life Prediction of Two Rotor Steels under Creep-Fatigue Interaction at Elevated Temperature

Improvements on Resistance to Stress Relaxation of Low Carbon Martensite

Contact Info

Product

Resources

About