Influence of Details on Fatigue Behavior of Structures

by Harold Mindlin,


Serial Information: Journal of the Structural Division, 1968, Vol. 94, Issue 12, Pg. 2678-2698


Document Type: Journal Paper

Abstract: The behavior of a structure subjected to cyclic loads is dependent upon a number of details, either intentional or unintentional, which could be potential initiation sites. Since the over-all effect of such details on fatigue strength cannot be calculated accurately, design values have usually been based on laboratory data generated in tests of specimens that simulate the characteristic stress-raiser of the actual detail. The data from tests of butt- and fillet-welded joints, beam details, riveted and bolted joints in base materials of the common classes of structural steels are presented and analyzed. Details have a major influence on the fatigue behavior of structures because they result in: (1) localized increases in stress (above the nominal stress); and (2) residual stresses. The test data generated in the laboratory have provided a basis for establishment of allowable stresses and the development of proper design techniques to prevent fatigue failures in structures. In addition, methods have been developed to improve the fatigue strength of structures containing critical details by minimizing the stress concentration or favorably altering residual stresses, or both.

Subject Headings: Structural behavior | Maximum loads | Residual stress | Fatigue tests | Field tests | Joints

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