New Representation of the Diagrams of Ultimate Stresses for the Fatigue Analysis of Aluminum Structures

摘要

We propose a new analytic representation of the diagrams of ultimate stresses for constant fatigue life. The diagrams are constructed according to limited amount of experimental data obtained as a result of fatigue testing of smooth specimens of the metal of welded joints of aluminum alloys. In determining the "hot-spot" stressed state, these diagrams enable us to perform the fatigue analysis of welded aluminum structures with regard for the stress concentration, the level and character of distribution of residual stresses, misalignment in the zone of the joint, and other factors.