Relation between Internal Friction and Fatigue

Abstract:

Solids show the feature of internal friction and the feature of fatigue. As a cause for the both features we assume the migration of atomic items. The driving forces for the migration of the atomic items can be mechanical stress gradients and temperature gradients. In an earlier publication formulas have been derived for the internal friction and for the fatigue. From these formulas follows a relation between internal friction and fatigue. The mechanical stress gradients are the cause of the background of internal friction which shows a monotonous rise with temperature. Temperature gradients in the solid can be produced by total internal friction. In contrast to the background of internal friction the temperature dependence of the total internal friction shows maxima and minima. Because of the relations between internal friction and fatigue the temperature dependence of fatigue shows that the fatigue is caused by temperature gradients. The relation between internal friction and fatigue also shows the influence of the internal friction on the fatigue curve.

• Periodical: Advanced Engineering Forum (Volume 31)
• Pages: 1-9
• DOI: https://doi.org/10.4028/www.scientific.net/AEF.31.1
• Online since: February 2019
• Authors: Wolfgang Gräfe
• Keywords: Fatigue, Internal Friction, Iron, Nickel, Steel

References

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