Kirkhope et al. [1,2] discusses methods of improving fatigue life in welded steel structures by operations such as grinding, peening, water-jet eroding and remelting. They stated that use of special welding techniques applied as part of the welding process in lieu of post-weld operations are attractive because the associated costs
Fatigue Assessment for Welded Aluminium Structures - TWIThis has led to thickness effect penalties, applied to the fatigue strength obtained from the S-N curve, in many fatigue design rules for welded steel of the form ( t ref /t) p, where t = thickness, t ref = reference thickness (usually around 25mm) and the exponent p = 0.25. Recent work showed that the thickness effect also depended on the
Aug 16, 2013 · The girth butt welds in the joint are the critical parts under fatigue loading. This study presents a fatigue life evaluation of the girth butt welds for the cast steel node connections, which are in a steel tower structure on an offshore platform under heavy wave fatigue loadings. The refined node FEM model is built including the welds.
Fatigue-Strength-Reduction Factors for Welds in Pressure Apr 17, 2000 · Nishijima, S., et al., 1983, Data Sheets on Fatigue Properties for Butt Welded Joints of SB42 Carbon Steel Plate for Boilers and Other Pressure VesselsEffect of Stress Ratio, NRIM Fatigue Data Sheet No. 34, National Research Institute for Metals, Tokyo, Japan.
THE EFFECTS OF WELD GEOMETRY ON THE FATIGUE 4.1 sectioned cast and measured geometric parameters of butt weld at point of crack initiation . . 5.1 fatigue cracks in specimen g36-27 . 5.2 fatigue results a36 steel cycle o+t . 5.3 fatigue results a441 steel cycle o~t 6.1 fatigue test specimen . 6.2 as-welded specimen 6.3 etched cross section of weld
The welds between G20Mn5QT cast steel and Q345B steel exhibited similar fatigue performance as G20Mn5QT cast steel. Fatigue crack tends to initiate in the heat affected zone (HAZ) at the cast steel.
Welded Structures - eFatigue - eFatigue:Fatigue Analysis Weld joints are classified by type , loading and shape. For example, a transversely loaded butt weld. It is assumed and confirmed by experiments that welds of a similar shape have the same general fatigue behavior so that a single design SN curve can be employed for any weld class.Fatigue tests on notched specimens of G20Mn5QT cast steel Corrosion fatigue experiments are carried out on butt welds of G20Mn5QT cast steel and Q345D hot rolled steel in simulated seawater. The cyclic stress versus number of cycles to failure (SN) curve