A Model of Fatigue Cumulative Damage Under Step Blocks Spectrum
Year: 2024
Type: article
Abstract: In view of the materials fatigue life prediction problem under step blocks specturm,especially the calculation parameters of the existing nonlinear models depend on a large number of test data or it is difficult to select a suitable reference value,which leads to the limitation in practical engineering application.A new effect coefficient αi=(Si+1/Si)1/b lg K based on adjacent load was proposed,in which the two parameters b,K were derived from the fatigue life relation S=KN-b.The fatigue damage models and the results which combined with the previous experimental results of two-,three-and four-stage loading were calculated and compared.The results show that the new model has better fatigue life/damage predicted results than Miner model,Manson model,Subramanyan model and Hashin model,which can be predicted more accurately in fatigue life/damage under step blocks spectrum.
Authors: ZHANG Lu, LIU HongLi, REN ChunXiao
Language: English
Subfield: Mechanics of Materials
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7067994379
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