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Accumulation of Fatigue Damages for Block-Type Loads with Use of Material Memory Function
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Influence of Stresses below the Fatigue Limit on Fatigue Life
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Cumulative Energy of Fatigue Cracking under Variable Amplitude Loading on the Example of C45 Steel
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Fatigue Life of CrMoV Steel after Long Term Service
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Accuracy of Analytical-Experimental Method for Determining the Fatigue Characteristics in a Limited Life Region
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Cumulative Energy of Fatigue Cracking under Variable Amplitude Loading on the Example of C45 Steel

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Abstract:

The article presents the results of low and high cycle fatigue tests of C45 steel for constant and variable amplitude loading in the stress and energy based approach. Values of the cumulated energy of plastic strain ΣΔWpl for programmed loading (at selected levels of stress amplitude Sa) were found to meet reliability criteria for results obtained in the condition of constant amplitude loading. (R= -1). It was also found that the results obtained in the energy based approach are characterised by a smaller range of relative difference changes (δ(N) = 0,77 to 1,17) than the results obtained in the stress based approach (δ(N) = 0,15 to 1,94). At stress level Sa = 428 MPa, (corresponding to yield point of C45 steel) value δ(N) is similar for the stress based approach and energy based approach.

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Periodical:

Solid State Phenomena (Volume 224)

Pages:

51-56

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.224.51

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Online since:

November 2014

Authors:

Bogdan Ligaj

Keywords:

C45 Steel, Diagrams of Fatigue Life, Low-Cycle Fatigue

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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References

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