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A Modified Walker Model Dealing with Mean Stress Effect in Fatigue Life Prediction for Aeroengine Disks
Joint Authors
Lu, Shan
Su, Yunlai
Yang, Mao
Li, Yan
Source
Mathematical Problems in Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-03-22
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
Mean stress effect plays an important role in fatigue life prediction, and it is discovered that maximum stress has nonnegligible influence on mean stress effect.
Therefore, a modified Walker model is proposed to account for mean stress effect on fatigue life of aeroengine disks, which contains the influence of stress ratio and maximum stress on mean stress effect.
Eight sets of fatigue data for standard smooth bars from six kinds of materials commonly used in aeroengine disks as well as two sets of experimental data from simulated specimens of turbine disks were employed to investigate the prediction capability of the proposed model against other candidate mean stress relationships.
It is found that Goodman model generates most conservative results, while Morrow model overestimates fatigue life for most cases.
SWT model yields similar results to Walker model but with less accuracy.
The results of the modified Walker model turn out to be superior to those of any other candidate models for all cases examined, especially for large mean stress ones.
Thus, the modified Walker model can be an effective method to predict fatigue lives of aeroengine disks influenced by mean stresses.
American Psychological Association (APA)
Lu, Shan& Su, Yunlai& Yang, Mao& Li, Yan. 2018. A Modified Walker Model Dealing with Mean Stress Effect in Fatigue Life Prediction for Aeroengine Disks. Mathematical Problems in Engineering،Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1207833
Modern Language Association (MLA)
Lu, Shan…[et al.]. A Modified Walker Model Dealing with Mean Stress Effect in Fatigue Life Prediction for Aeroengine Disks. Mathematical Problems in Engineering No. 2018 (2018), pp.1-12.
https://search.emarefa.net/detail/BIM-1207833
American Medical Association (AMA)
Lu, Shan& Su, Yunlai& Yang, Mao& Li, Yan. A Modified Walker Model Dealing with Mean Stress Effect in Fatigue Life Prediction for Aeroengine Disks. Mathematical Problems in Engineering. 2018. Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1207833
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1207833