... this is represented by the tearing resistance curve which typically is on the form: = (5) Where and are constants and is the amount of crack propagation. Finally for transition to cleavage failure this is represented by a critical value of the J-integral, ,(or CTOD): = (6) An important part of the fracture...

.... Results show that K T increases and K Q decreases with increasing Re in open-water conditions, while complex flow involving laminar, turbulent, transition and flow separation is captured around propeller. Predicted η r shows an unexpected decrease when Re opt > Re c , but when the open-water...

... methods using phase transition characteristics, and solid fluidization maintaining the original state until entering into the pipes, have been gradually proposed (Liang et al., 2008; Zhou et al., 2017; Chen et al., 2018), and a series of trial-production projects, sponsored by Russia, America, Canada...

... layer, which makes the formation temperature around the wellbore constantly change, and there is a phase transition when the frozen soil melts. Therefore, the temperature field of the formation around the wellbore is an unstable temperature field with phase transition and constantly changing boundaries...

...) observed the chaotic falling pattern of the disk in their experiments. Shenoy et al. (2010) numerically modeled the pattern of vortex shedding from disks with different ratios of thickness to diameter. Furthermore, transitions between the classical four states have been studied, and some new falling states...

... capture key information, including the peak Froude number of Lee waves, transition Froude number, and other significant features. The experimental peak Froude number of Lee waves was Fr p = 0.8, at which point the symmetric Lee wave has a dominant amplitude, and the overall antisymmetry of the wake...

... and temperature are the most important factors determining the hydrate phase transitions. It is necessary to learn the impacts of pressure on hydrate-bearing layers, especially during depressurization. In this research, a numerical model mentioned in our previous work (Chen, 2022) is selected to study the multi...

... vibrator training data damage detection transition japan government artificial intelligence easurement num detection dataset standard data accelerometer Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference Ottawa, Canada, June 19-23, 2023 Copyright © 2023...

... ABSTRACT Pore fluid (e.g., water and methane) phase transition in rocks determines many geology properties of the polar strata, including heat transfer, deformation, and percolation. In this article, low-field nuclear magnetic resonance tests are conducted to investigate the freezing...

... case is carried out using COMSOL Multiphysics. The results show that the mass transfer in the porous medium may be always faster than the heat transfer due to depressurization. It is also found that the phase transitions closer to wellbore may have a negative impact on pressure transfer. These findings...

.... upstream oil & gas transition experiment experimental study mathematical modeling thickness failure mode shear modulus experimental data ice destruction mechanism ice load bolshev ice failure interaction strength ice field level ice field ice floe Proceedings of the Thirty-first...

...). artificial intelligence machine learning energy conservation renewable energy transition wind energy social responsibility offshore installation offshore installation process cgspn approach temporal transition offshore operation base port simulation inventory offshore wind farm weather...

... ABSTRACT In this paper, we investigated the vortex-induced vibration of a catenary flexible riser under log-law sheared flows. Two high-speed cameras are employed to capture the in-plane and out-of-plane displacements, respectively. The experimental results indicate that the mode transition...

..., and irregular transition. The performance is also analyzed based on the signal length employed. INTRODUCTION Pipeline-riser structures are generally used in offshore oil and gas field. Transported mixtures of liquids, gases, and solid components through horizontal (or inclined) pipeline are raised up...

... of the relative phase angle of the cross-spectra might be harmful to sea state estimation using the wave buoy analogy. In this paper, using long stationary time series, the transition of estimated wave parameters has been investigated by iterative analyses with a few seconds of time shifting. In the results...

... wake transition vortex spatiotemporal symmetry three-dimensional reconstruction equation configuration wake control splitter plate instability cylinder wavelength reynolds number fluid mechanics circular cylinder stability analysis neutral stability curve transition mechanics...

... transition cylinder numerical simulation three-dimensional numerical simulation circular cylinder secondary instability regime vortex equation amplitude rotation rate lift coefficient reynolds number wake flow regime cylinder surface reservoir simulation Three-dimensional...

... and amplitudes agreed well with the experimental data. Experimental works also discovered that the IWs have a transition from body-generated dominant to wake-generated dominant with the growth of the source translational speed. The critical condition is related to the Froude number Fr =U/ND, where U...

... of transition are discussed. INTRODUCTION The occurrence of laminar-turbulent transition on lifting bodies has been studied in numerous investigations. As AOA increases from a modest value, the adverse pressure gradients grow and the flow can separate on the upper surface of a foil depending on particular...

... processing. This prevents increasing resistances due to more suited diameter ratios. To avoid expensive weldments and to allow for local reinforcements of joints forged hollow sections were developed. Forged CHS offer a continuously changing wall-thickness within a transition length providing either...