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Assessment of Fatigue of Structural Steels


Medium: Fachartikel
Sprache(n): en 
Veröffentlicht in: Procedia Engineering, , v. 40
Tagung: Steel Structures and Bridges 2012
Seite(n): 148-153
DOI: 10.1016/j.proeng.2012.07.071
Abstrakt: After the application of N cycles of stress range Δσ, the crack will grow from the initial to critical length according to the algebraic equation (4). The algebraic equation holds for any material, only if m>2. For structural ferritic steel, the critical length of crack is a=8mm (10), where the number of fatigue cycles is N=108 and cyclic stress range Δσ=27.5MPa. Under repeated shear loading the largest membrane and bending stresses are concentrated in the vicinity of corners of the web. The stress ranges for 106 cycles (steel and aluminium alloys) and the constants in equation of curve Δσ3.N=constant are given as follows in the fifth chapter.


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