... non-proportional low-cycle fatigue crack growth behavior of hull inclined cracked plate Wenling Tu1, Junlin Deng1, Hualin Tang1, Dawei Dong1 1. School of Mechanical and Marine Engineering,Beibu Gulf University Qinzhou, Guangxi, China ABSTRACT Generally, the biaxial fatigue crack growth path...

... upstream oil & gas self magnetic flux leakage production logging magnetic flux density permanent magnetization magnetic flux leakage magnetic field slit tip production monitoring steel plate background field linear relation fatigue crack magnetization smfl slit marine...

... pipes for deep and ultra-deep water, sour service applications, and for sour environment applications with collapse enhancement. The main outcomes of these previous studies are presented in De Lucca (2015) and Arroyo et al (2011 and 2014), for heavy wall and high-grade UOE line pipes. fatigue...

..., there are many nondestructive testing methods available. Magnetic methods to monitor fatigue cracks are not yet fully exploited and seem promising due to the possibility of passive monitoring using the Earth magnetic field as source. Measurements and numerical simulations show that magnetic fields in steel...

... of developing such a system. The paper describes the initial research steps made. In the first place, this includes reviewing conventional and recent methods for sensing and monitoring fatigue cracks and discussing their applicability for marine structures. A special attention is given to the promising...

... of submerged arc welded (SAW) steel with specified minimum yield strength (SMYS) of 420 MPa. brittle fracture initiation initiation fracture toughness low temperature toughness hydraulic fracturing steel fusion line notch haz welding fatigue crack microstructure ferrite weld metal...

... The nonlinear dynamic contact model of free spanning pipeline with a non-propagating fatigue crack is established firstly by means of contact analysis. The Newton iteration method and Newmark-β numerical integration are used to calculate the proposed nonlinear dynamic equation. The super...

... A few cases of fatigue cracks in orthotropic steel bridge decks have been reported in Japan and European countries. Recently, similar cracks were also found in a large suspension bridge in southern China, which has been put into service only for about ten years. Such cracks significantly affect...

... with chamfering or grinding. Edge treatment makes the painting easily and enhances the fatigue performance besides. weld improvement residual stress fca fatigue crack weld toe steel plate specimen eh40-tm steel plate welding condition fcaw test specimen mean 2 welding process butt joint...

... Numerical Study on the Fatigue Crack Propagation Behavior in Flattened Martensite Dual Phase Steel Naoki Osawa*, Daiki Ueno Ryo Shimoike*, Kiyoshi Hashimoto*, Kiyotaka Nakashima and Tetsuro Nose * Department of Naval Architecture and Ocean Engineering, Osaka University, Osaka, Japan ** Nissan...

... fatigue crack Estimation of Surface Crack Depth Based on Measurement of Crack Opening Deformation Jingxia Yue, Yukio Fujimoto and Taufiq A. Setyanto Department of Social and Environmental Engineering, Graduate School of Engineering, Hiroshima University Higashi-hiroshima, Hiroshima, Japan ABSTRACT...

... T-joints (Hara et al., 1986), and fatigue tests of T- and Y-joints subjected to in-plane or out-of-plane random loads (Dover and Dharmavasan, 1982), etc. numerical analysis steel weld toe through-thickness crack api rp chord thickness fatigue crack van wingerde fatigue test offshore...

... examples of long fatigue cracks in merchant ships, to illustrate the need for further research in the field of damage assessment of fatigue cracks in hulls. INTRODUCTION Fatigue cracks in merchant ships is a well-known problem within the industry. The amount of cracks in new hulls is expected...

... flange defect fatigue crack fracture weld azuma test program test result hydraulic fracturing test specimen flange Brittle Fracture in Beam-to-Column Welded Joints Numerical Simulation of Test Results K. Dale, Y. Kurobane and K. Azuma Department of Architecture, Sojo University Kumamoto...

... on this region is different from the nominal stress range, and is more appropriate for the prediction of initiation of fatigue crack. Nevertheless if a specimen has lower yield stress, the actual stress range becomes smaller, which might lead to a longer life of fatigue cracks initiation. To verify the effect...

... rules for use with welded AL-6XN stainless steel details. weld detail fatigue strength groove weld fillet weld groove weld detail ksi residual stress longitudinal fillet weld detail resistance curve fatigue crack longitudinal fillet weld discontinuity minimum stress fisher weld...

.... Analytical solutions by Neuber and Westergaard are employed for this purpose. A crack propagation law is newly developed based on the inherent damage zone model. The propagation rate of small sized fatigue cracks, the effect of crack length on threshold strength, the occurrence condition of non-propagating...

.... Each of welded T-joint specimens was composed of a main plate and rib plate. These Specimens were installed with fatigue cracks at the weld toes. A horizontal load was applied to the rib plate, while tensile loads applied to the ends of the main plate. Two different loading procedures were adopted...

... ABSTRACT Residual fatigue life prediction considerations as related to offshore structures are presented in this paper. Firstly it is demonstrated that a fatigue crack in offshore structures is generally exposed to mixed mode loads and that a pure mode I crack path may not be established due...

... ABSTRACT The retardation of fatigue crack caused by crack tip local heating was studied. Steady fatigue crack growth under constant amplitude loading would be disturbed by the sudden change in plastic zone size resulting from a single overload. However, mechanical properties of metal...