... Transition Riser-Flowline Upper Estimate Virtual Anchor Spacing Water-Alternated Gas Water Depth Sinusoidal OOS wavelength INTRODUCTION Thermo-mechanical design of HPHT pipelines may require the installation of several buckling initiation devices on a same pipeline. From there arises the question of ensuring...

... that there is agreement between the data of the LiDAR instruments and the wave gauges, especially when detecting the surface elevation when breaking is initiated. However, in the absence of wave breaking, the data containing measured surface elevations is sparse. This is because the surface is nearly non-detectable, due...

... must account for the potential of in-service fatigue failure. It is well known that weld joints are preferential locations for fatigue crack initiation in cyclically loaded structures. Increasing the fatigue resistance of welds, particularly those in the highest stressed locations, can significantly...

... treatment process. Due to the initiation and growth of β-phase during the sensitzation heat treatment, Crane and Gangloff, (2016) proposed that the growth rate of SCC-induced intergranular crack increases with an increase in the sensitization time and sensitization temperatures during the heat treatment...

...). The initial damage conditions and damage evolution laws are discussed with respect to the intensity of sloshing. In contrast to the classical fluid-related physical modeling of sloshing based on energy dissipation in the liquid, the present approach emphasizes also the energy transfer into the structure...

...- cracks up to arrest of macroscopic cracks on in the centimeter to meter range. In the first group the arrest happens locally, proba- bly highly influenced by local microstructural features like grain boundary orientation, and would rather be categorized as avoid- ance of cleavage initiation...

...; Instrumented impact test; Charpy-V; Arrest load. NOMENCLATURE A Material constant B Specimen thickness C(T) Compact Tension CVN Charpy-V notch DCB Double Cantilever Beam fTKIa Distribution function for TKIa Fa Crack arrest force Fgy General yielding force Fm Maximum force Fu Clevage initiation force MC Master...

... Abstract Instrumented Charpy testing on 420 MPa grade construction steel was done. Two weld thermal simulated microstructures and two different initial crack geometries were studied over a wide range of temperatures in ductile-brittle-transition temperature (DBTT) region. Simulated...

... the threshold value of plastic failure criterion for ECA Strain-Based design application. crack tip pipe pisarski carlucci procedure prediction hydraulic fracturing crack initiation ctod ligament upstream oil & gas failure criteria mcirdi fea criteria application flaw remote strain...

... Engineering Society. Finally, new standard was published in January 2014 as JWES standard. metals & mining brittle fracture upstream oil & gas thickness crack length test specimen initiation arrest toughness impact energy toughness equation evaluation test method crack arrest...

... ABSTRACT Buckling tests for a GFRP unstiffened panel and stiffened panels with a top-hat stiffener are performed, and the fundamental buckling/fracture behavior including initiation of delamination is identified. Compressive stress in BWR layers is considered as one of the causes...

... that the influence of pipe dimensions, loading parameters, crack initiation resistance as well as testing procedure on the fracture behavior has been neither understood nor properly described. This work aims to shed light on these questions regarding the applicability of conventional methods and to better illuminate...

... ABSTRACT Ductile crack initiation under large-scale yielding is more likely to happen under extreme loading with small flaws and tougher materials. This paper discusses the Stress Modified Critical Strain model, and its applications to pipelines subjected to severe loading such as due...

... ABSTRACT: This paper provides results from a comprehensive study on mechanical characterization of high-strength pipeline steel, grade X100 using experimental and numerical methods. The material was characterized for anisotropic plasticity, fracture initiation for various states of stress...

... 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...

... ABSTRACT The metallurgical factors affecting HIC and SOHIC of high strength linepipe steel are investigated and the cracking resistance is correlated with diffusible hydrogen. Internal cracks were initiated at elongated MnS and TiNb(C, N) cluster regardless of the cracking mode. Increase...

... ABSTRACT Brittle fractures of the hull structure cause serious structural damage, with the potential for both fatalities and environmental damage, once it happens. In recognition of this, ships are designed and constructed so as to ensure that brittle crack initiation does not occur. Further...

... tests are performed. pipeline fracture surface prestrain loading direction 0 loading anisotropy mechanical property metals & mining stress triaxiality prestrained material steel plastic strain specimen loading direction initiation hydraulic fracturing pipe ductility line...

.... The parameters for damage initiation and fracture are verified by a coupon test. FE models combining material damage effects are analyzed for grouted X joints under brace in-plane bending. The geometric parameters of these models are based on previous tests conducted in National University of Singapore (NUS...

... was analyzed, and the fatigue life and damage of a component were predicted on the basis of damage mechanics. The result indicates that the initial damage will affect the stress, fatigue life and future damage of component. INTRODUCTION The component subject to the action of load and corrosion is prone...