بررسي اثر بارگذاري بدون ترتيب بر عمر خستگي فولاد ساختماني

EFFECT OF RANDOM LOADING ON FATIGUE LIFE OF A STRUCTURAL STEEL

Generally, fatigue loading conditions in most of the structures are of random nature and loading under constant strain or stress amplitude are less frequent. In this work, fatigue life of a mild steel under random loading with different stress amplitude has been studied. The obtained results indicate that by conducting rule of accumulative damage and using constant strain amplitude curves, more appropriate approach may be achieved for fatigue analysis under random loading. Also for counting the cycles, the modified rain flow method gives better results. The obtained results show that the considered assumptions in the present work conform to the experimental results.