Fatigue life of randomly loaded notched components
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We generalize the results of the investigation of the fatigue life of structural components with notches under random loads. For this purpose, we analyze various blocks of random loads, both stationary and nonstationary, and their influence on the stress concentration near notches. An attempt is made to determine the critical sites of a structure according to the measured levels of strains on smooth surfaces. We propose a method for reducing stress concentration by applying localized plastic deformation of notches. This method is experimentally checked for specimens of low-carbon steel. In particular, it is shown that the realization of technological operations of this sort after long-term operation of a structure may significantly increase its safety.
KeywordsFatigue Plastic Deformation Structural Material Stress Concentration Fatigue Life
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