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the effect of Residual Stresses Induced by Strain-Peening upon Fatigue Strength
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English
Abstract
THE PURPOSE of this experiment was to determine the role of residual stresses in fatigue strength independent of other factors usually involved when residual stresses are introduced. It consisted of an investigation of the influence of residual stresses introduced by shotpeening on the fatigue strength of steel (Rockwell C hardness 48) in unidirectional bending. Residual stresses were varied by peening under various conditions of applied strain. This process introduced substantially the same amount and kind of surface cold working with residual stresses varying over a wide range of values.
It was found that shotpeening of steel of this hardness is beneficial primarily because of the nature of the macro-residual-stresses introduced by the process. There is no gain attributable to “strain-hardening” for this material. An effort was made to explain the results on the basis of three failure criteria: distortion energy, maximum shear stress, and maximum stress.*
Citation
Mattson, R. and Roberts, J., "the effect of Residual Stresses Induced by Strain-Peening upon Fatigue Strength," SAE Technical Paper 600018, 1960, https://doi.org/10.4271/600018.Also In
References
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- “Fatigue Weakness of Surfaces,” Almen J. O. Product Engineering, Vol. 21 November, 1950 125
- “Effect of Shot Peening Variables and Residual Stresses on Fatigue Life of Leaf Spring Specimens,” Mattson R. L. Coleman W. S. Jr. SAE Transactions Vol. 62 1954 546 556
- “Theory and Procedure for Residual Stress Analysis as Practiced by Engineering Mechanics Department,” Rembowski J. L. Research Laboratroies, General Motors Corp.
- “Derivation of Fundamental Equation of Residual Stress Analysis by Dissection,” Johnson L. G. Industrial Mathematics Vol. 5 1955 7 13