Fretting fatigue total life assessment including wear and a varying critical distance

Energy efficiency is a key issue worldwide, and not confined solely to the realm of engineers. Past failures of mechanical power system components must be examined carefully in order to minimise future occurrences and increase energy efficiencies. Improved design procedures have been highly sought by engineers and researchers over the past few decades. The latest verified method with strong application potential within the power industry is that of the Theory of Critical Distances (TCD). TCD is not one method, but a group of methods that have a common feature; the use of a characteristic material length parameter, the critical distance L, for calculating the influence of notch-like stress raisers under static and fatigue loading. A case study from a hydro power plant turbine shaft was chosen to illustrate the development of this methodology. The paper illustrates the application of TCD to the fatigue life assessment of a turbine shaft with stress concentrations due to pitting corrosion.

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From uni- to multi-axial fretting-fatigue crack nucleation: Development of a stress-gradient-dependent critical distance approach

International Journal of Fatigue ◽

10.1016/j.ijfatigue.2013.05.016 ◽

2014 ◽

Vol 62 ◽

pp. 194-209 ◽

Cited By ~ 38

Author(s):

S. Fouvry ◽

H. Gallien ◽

B. Berthel

Keyword(s):

Fatigue Crack ◽

Crack Nucleation ◽

Stress Gradient ◽

Fretting Fatigue ◽

Critical Distance ◽

Fatigue Crack Nucleation ◽

Distance Approach

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Application of the Theory of Critical Distance to Fretting Fatigue

Fracture of Nano and Engineering Materials and Structures ◽

10.1007/1-4020-4972-2_545 ◽

2008 ◽

pp. 1099-1100

Author(s):

J. A. Araujo ◽

L. Susmel ◽

D. Taylor ◽

L. H. M. Lopes

Keyword(s):

Fretting Fatigue ◽

Critical Distance

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Fretting Fatigue Life Estimations Based on the Critical Distance Stress Theory

Procedia Engineering ◽

10.1016/j.proeng.2011.04.519 ◽

2011 ◽

Vol 10 ◽

pp. 3134-3139 ◽

Cited By ~ 10

Author(s):

Toshio Hattori ◽

Muhammad Amiruddin Bin Ab Wahab ◽

Takuya Ishida ◽

Minoru Yamashita

Keyword(s):

Fatigue Life ◽

Fretting Fatigue ◽

Critical Distance ◽

Stress Theory

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1414 Fretting fatigue life estimation based on the critical distance stress theory

The Proceedings of the Materials and Mechanics Conference ◽

10.1299/jsmemm.2010.670 ◽

2010 ◽

Vol 2010 (0) ◽

pp. 670-671

Author(s):

Toshio HATTORI ◽

Youichi YAMASHITA ◽

Vu Tning KIEN ◽

Minoru YAMASHITA

Keyword(s):

Fatigue Life ◽

Fretting Fatigue ◽

Critical Distance ◽

Stress Theory ◽

Life Estimation ◽

Fatigue Life Estimation

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Life Assessment in Fretting Fatigue

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.618.99 ◽

2014 ◽

Vol 618 ◽

pp. 99-122 ◽

Cited By ~ 2

Author(s):

Carlos Navarro ◽

Jesús Vázquez ◽

Jaime Domínguez

Keyword(s):

Fatigue Strength ◽

Detrimental Effect ◽

Fretting Fatigue ◽

Life Assessment ◽

Stress Fields ◽

Strength Analysis ◽

Cyclic Loads ◽

Cyclic Variation ◽

Contact Conditions ◽

The Many

Fretting fatigue denotes the detrimental effect on a material arising from the cyclic sliding of two contacting surfaces with small relative displacements between them. One or both of the components in contact may be subject to bulk stresses caused by cyclic loads. The assessment of the fretting fatigue strength and life of any component is a complicated issue due to the many parameters affecting it, the complexity of the stress fields cyclic variation during fretting and the uncertainties associated to the contact conditions. This paper describes some singular aspects of fretting fatigue related to strength analysis and testing, presents a procedure developed by the authors during the last years to estimate the fretting fatigue strength and life and compares the assessment outcomes with the results of tests carried out by different authors.

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