... intelligence structural geology axial stress wellbore design upstream oil & gas deformation modulus approximation best approximation experiment plug reservoir characterization hydraulic fracturing oilfield hydraulic fracture design uniaxial strain experiment uniaxial strain condition...

... Abstract Currently, the so-called state-of-practice approaches are commonly used inriser VIV analysis. DNV RP F204 has indicated that riser axial stress fatiguedue to VIV is not considered due to the limitation of the state-of-practiceapproach. This paper gives a methodology for considering...

... fatigue calculations are based on maximum principal stresses. Thus the radial, hoop, and axial stresses are central to the calculation of critical crack size and fatigue life predictions. This is an important difference between strength calculations and fracture mechanics calculations. For simple...

... be obtained in [1, 2]. The tensile armour wires are the fatigue critical component in the end fitting structure. The key fatigue stress component in the tensile amour wire is the axial stress in the wire cross section [3]. Figure 1 illustrates the end fitting assembly, where four regions are defined according...

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... of the jacket platform 2/4A. 2/4A is located in an un-disturbed wave field; i.e. the waves and current are not affected by diffraction due to the Ekofisk Barrier. Axial stresses in several braces measured in storm sea states were compared to stresses predicted by various wave load procedures. Further, maximum...

.... The model results in an explicit criterion for failure which can easily be applied in an operational setting, and provides fundamental insight in the effect of the depth and the circumferer.tiallength of the defect, the material grade and the axial stress. A recipe is available which shows how a burst...

... member and no capped-end compression. Since the hoop and capped-end axial stresses from external pressure are always in compression, they are assumed to have a positive sign. One of the approaches used in the design of deepwater offshore structures, such as compliant towers, is to check the members for 1...

... (Reference 4). I I I Wz OTC 6098 K. A. DIGRE, J. J. KENNEY, R. SIMIC The biaxial loading atremdstrain relationships were taken from Timoshenko, Ref. 5, as follows: a = [E/(1-u2)l (~a oh= [E/(1-f12)] (e~+flea) ?]l = ~@ ~~ = (oh-ua)/2 ra = Qa12 Where: Uais axial stress, ksi oh is hoop Bbres#,ksi rll is hoop...

... by waves and currents. The static stress of a 6,000 m steel riser due to it?s own weight is up to 500 MPa. Unfortunately the longest resonance period of the 6,000 m riser system (about 6 seconds) is near to the natural heave period of a monohull vessel. Thus the axial stresses due longitudinal vibrations...

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... at E point are also settled at -1.0 m and -49.6 m in depth. wave propagation axial stress earthquake displacement time history ministry pipeline osamu kiyomiya pipe stress deformation acceleration record observation line wave length upstream oil & gas subsurface condition...

... equation casing and cementing aisc specification platform design stiffness conductor upstream oil & gas caisson axial load kip offshore platform conductor axial stress stability criterion criterion deflection clearance kip load criteria casing design OTC 3902 DESIGN METHODOLOGY...

...). The "effective" ten- sion at any point along the pipe is the actual tension obtained by summing the axial stresses over the pipe cross section plus an additional tensile force equal to the local hydrostatic force exerted on an area the size of the total pipe cross section. This device is necessary OTC 1556 JAMES...