Academic literature on the topic 'Thin ladder deformation'
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Journal articles on the topic "Thin ladder deformation"
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He, Yong Qiang. "Experiment and Analysis on Side Milling Deformation of Thin-Walled Workpieces Using Laddered Symmetrical Tool Path." Advanced Materials Research 710 (June 2013): 233–37. http://dx.doi.org/10.4028/www.scientific.net/amr.710.233.
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The aluminum 7075 workpieces are machined on a vertical machining center KX650 using laddered symmetrical tool path. The deformation characteristics are studied under different cutting conditions. Different cutting parameters are changed one by one in side milling tests to find out their impact on deformation error. The analyzed result provides a solid basis for machining parameter optimization in side milling thin-walled workpieces.
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Taniguchi, T., Yoshihisa Kaneko, and Satoshi Hashimoto. "Fatigue Lives of a Ferritic Stainless Steel Containing Deformation Twins." Key Engineering Materials 353-358 (September 2007): 283–86. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.283.
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The fatigue properties of ferritic stainless steel containing deformation twins were investigated. Monotonic tensile tests and push-pull fatigue tests were conducted on the specimens both with and without twins. Fatigue lives of the twinned specimens were about four times shorter than those without the deformation twins, although yield stresses of both specimens were almost equal. It was found that the fatigue cracking along the deformation twin boundaries caused the reduction in fatigue life. Dislocation structure observation using the ECCI method revealed that no specific dislocation structure was formed near the cracked deformation twin boundary, although the ladder-like PSB structure was developed along an annealing twin boundary in an austenitic stainless steel.
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Sun, Jing Lu, Li Jia Liu, and Bing Zhang. "Product Exploitation of U-Shaped Canal of Channels Anti-Seepage." Advanced Materials Research 1048 (October 2014): 584–87. http://dx.doi.org/10.4028/www.scientific.net/amr.1048.584.
Full textAbstract:
In order to solve the problem of the traditional u-shaped canal, including of size small, joint bad problems, water penetration, and bad ability of frost resistance, this paper launched preliminary research of a new u-shaped product development. Length of new canal products is twice; steel fiber of coated copper can increase resistance of rust and crack than traditional U-shaped canal. Hydro-expansive rubber of Putty type was applied to improve the compatibility of deformation joint and improve the permeability resistance. The best filling cross-section rectangle is truly adopted, not only having all advantages of traditional U-shaped canal and ladder type, but also having high mechanical properties, excellent durability, good environmental performance, good quality assembly components, high ratio of cost and performance. It is upgrading products of control the structure of traditional u-shaped slot and ladder type slot and can solve the "last kilometer" problem in the field.
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Pan, Rongkun, Zhihui Ma, Minggao Yu, and Shuaidong Wu. "Research on the Deformation Characteristics and Support Technology of a Bottom Gas Extraction Roadway under Repeated Interference." Advances in Civil Engineering 2019 (August 29, 2019): 1–14. http://dx.doi.org/10.1155/2019/1413568.
Full textAbstract:
Taking Pingbao Coal Mine as the engineering background, the stress distribution, surrounding rock displacement, and plastic zone distribution characteristics of a bottom gas extraction roadway are simulated by FLAC3D under multiple disturbances. The mining disturbance due to the overlying coal seam is obtained: the deformation of the roof subsidence and lower rib closure of the bottom gas extraction roadway are larger than the floor heave and upper rib closure, respectively. According to the mechanical analysis of the bottom gas extraction roadway, the equations for calculating the displacement at each point on the surface of the bottom gas extraction roadway and the methods for calculating the maximum displacement, the maximum normal stress, and the maximum shear stress are obtained to reasonably explain the deformation of the bottom gas extraction roadway under multiple disturbances. Then, the bolt-mesh-anchor and ladder beam support mode are designed. After onsite observation of the bottom gas extraction roadway of the 12030 coal mining face of the Pingbao Coal Mine, it is concluded that the deformation characteristics of the bottom gas extraction roadway basically conform to the abovementioned equations and that the support is effective. This paper can provide a reference for the optimization of bottom gas extraction roadway positioning, the determination of support parameters, and the deformation prediction around a bottom gas extraction roadway under similar conditions.
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Ning, Yong Quan, Ze Kun Yao, Xing Hua Xie, and Hong Zhen Guo. "Investigation on Thermomechanical Treatment of PM FGH4096 Superalloy." Advanced Materials Research 97-101 (March 2010): 255–59. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.255.
Full textAbstract:
Thermomechanical treatment (TMT) of PM FGH4096 superalloy were carried out to futher improve the mechanical strength and refine the γ’ particle, and this processing route as follows: near-isothrmal forged at deformation temperature of 1130°C and strain rate of 0.1 s-1, followed by subsequence oil quenching, and then held at 760°C for 16 h. OM, SEM and TEM were used to investigate the microstructure of TMTed alloy. It was found that the advanced mechanical strength originated form the dispersion strengthening of fine γ’ particle and stain hardening reserved from deformation after TMT. But TMT had no obvious effect on improving the chemical segregation of original materials. Fracture analysis of TMTed alloy shown that cracks origined from Ti and Nb chemical segregation and presented rose-pattern and ladder-pattern at room temperature and 750°C temperature.
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Tian, Hui, Yaming Jiang, Yexiong Qi, He Xiang, and Jingjing Yan. "Study of knitted fabrics with ultra-low modulus based on geometrical deformation mechanism." Textile Research Journal 89, no. 5 (February 15, 2018): 891–99. http://dx.doi.org/10.1177/0040517518758004.
Full textAbstract:
In some cases, the value of clothing pressure on the human body is more than desired which results in discomfort, especially for those designed for infants, aged people and professionals. In order to reduce the pressure so that it is at a comfortable level, this investigation developed a knitted fabric with ultra-low modulus based on the geometrical deformation mechanism. Experimental results show that the tensile deformation is due to the geometrical deformation and physical deformation. This paper focuses on the former, which is greatly improved by reknitting of the unroved yarn with remarkable crimps. The tensile results indicate that compared with the normally rib-knitted fabric, which the elongation of the reknitted fabric reaches at 50%, the tensile modulus decreases by 96%. It is proved that increasing the geometrical deformation is an effective method for reducing the elastic modulus. In addition, the pressure of men's cotton socks and ladies' stocking and tights on skin is measured. Experimental results show that the value of the pressure is as high as 2.959 kPa, which far exceeds the comfort pressure threshold of 0.667 kPa. Furthermore, this paper also studies the application of this developed reknitted fabric. The study of geometrical deformation mechanism-based ultra-low-modulus fabrics with knitting of the yarn with remarkable crimps has important significance, and provides scientific guidance for improving clothing pressure.
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Jinghong, Fan, and Peng Xianghe. "A Physically Based Constitutive Description for Nonproportional Cyclic Plasticity." Journal of Engineering Materials and Technology 113, no. 2 (April 1, 1991): 254–62. http://dx.doi.org/10.1115/1.2903400.
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The hardening behavior of materials in nonproportional cyclic process is related to the internal changes of materials, such as dislocation cell for wary slip material and ladder or vein substructures for planar slip material. The multiplicatively separated form of hardening function f, in terms of nonhardening region proposed by Ohno [1], and the measure of nonproportionality A proposed by Banallal and Marquis in 1987 [2], is then explained on this physical foundation. The new contributions of this hardening function are: (a) two parameters (f2 and f3) dependent on A are used to differentiate between the influence of latent hardening realized by a sudden change of loading direction, and hereditary hardening associated with nonproportional loading, (b) a general differential form fi (i = 1,2,3) is proposed, and memorial parameters a1 and a3 are introduced to describe different deformation history effects for wary and planar slip materials, (c) different hardening mechanisms through fi are embedded into thermomechanically constitutive relation. The stress responses of 304 and 316 stainless steels subjected to biaxial nonproportional loadings at room temperature are analyzed and compared with the experimental results obtained by Chaboche [3], Tanaka [4, 5] and Ohno [1].
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Azzouz, Mohamed. "Topological Monopoles in Quantum Antiferromagnets." Symmetry 11, no. 3 (March 5, 2019): 323. http://dx.doi.org/10.3390/sym11030323.
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While the observation of magnetic monopoles has defied all experimental attempts in high-energy physics and astrophysics, sound theoretical approaches predict that they should exist, and they have indeed been observed as quasiparticle excitations in certain condensed-matter systems. This indicates that, even though they are not ubiquitous contrary to electrons, it is possible to get them as excitations above a background. In this report, we show that phonons or lattice shear strain generate topological monopoles in some low-dimensional quantum antiferromagnets. For the Heisenberg ladder, phonons are found to generate topological monopoles with nonzero density due to quantum spin fluctuations. For the four-leg Heisenberg tube, longitudinal shear stress generates topological monopoles with density proportional to the strain deformation. The present theory is based on mapping the spin degrees of freedom onto spinless fermions using the generalized Jordan–Wigner transformation in dimensions higher than one. The effective magnetic field generated by the motion of the spinless fermions has nonzero divergence when phonons or shear stress are present. A possible material where the present kind of monopoles could be observed is BiCu
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Pan, Jiliang, Xu Wu, Qifeng Guo, Xun Xi, and Meifeng Cai. "Uniaxial Experimental Study of the Deformation Behavior and Energy Evolution of Conjugate Jointed Rock Based on AE and DIC Methods." Advances in Civil Engineering 2020 (September 10, 2020): 1–16. http://dx.doi.org/10.1155/2020/8850250.
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Conjugate joint is one of the most common joint forms in natural rock mass, which is produced by different tectonic movements. To better understand the preexisting flaws, it is necessary to investigate joint development and its effect on the deformation and strength of the rock. In this study, uniaxial compression tests of granite specimens with different conjugate joints distribution were performed using the GAW-2000 compression-testing machine system. The PCI-2 acoustic emission (AE) testing system was used to monitor the acoustic signal characteristics of the jointed specimens during the entire loading process. At the same time, a 3D digital image correlation (DIC) technique was used to study the evolution of stress field before the peak strength at different loading times. Based on the experimental results, the deformation and strength characteristics, AE parameters, damage evolution processes, and energy accumulation and dissipation properties of the conjugate jointed specimens were analyzed. It is considered that these changes were closely related to the angle between the primary and secondary joints. The results show that the AE counts can be used to characterize the damage and failure of the specimen during uniaxial compression. The local stress field evolution process obtained by the DIC can be used to analyze the crack initiation and propagation in the specimen. As the included angle increases from 0° to 90°, the elastic modulus first decreases and then increases, and the accumulative AE counts of the peak first increase and then decrease, while the peak strength does not change distinctly. The cumulative AE counts of the specimen with an included angle of 45° rise in a ladder-like manner, and the granite retains a certain degree of brittle failure characteristics under the axial loading. The total energy, elastic energy, and dissipation energy of the jointed specimens under uniaxial compression failure were significantly reduced. These findings can be regarded as a reference for future studies on the failure mechanism of granite with conjugate joints.
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Xu, Wenqiao, Hongwei Yin, Dong Jia, Changsheng Li, Wei Wang, Gengxiong Yang, Wanhui He, Zhuxin Chen, and Rong Ren. "Structural Features and Evolution of the Northwestern Sichuan Basin: Insights From Discrete Numerical Simulations." Frontiers in Earth Science 9 (March 24, 2021). http://dx.doi.org/10.3389/feart.2021.653395.
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The northwestern Sichuan Basin has experienced Meso-Cenozoic intracontinental compressional tectonic processes and formed multi-detachment stratigraphic distribution of foreland basins and fold-thrust belts, which have caused complicated structural deformations in the deep buried layers. Rapid uplift with accelerated erosion and two sets of detachments in the Lower Triassic and Lower Cambrian controlled the multilevel deformation structure. We conducted discrete numerical simulations with double weak detachments and erosion under extrusion conditions in order to examine the mechanics and kinematics of the frontalpiedmont zones of the NW Sichuan Basin. The following findings were made. (1) With continuous compression, the weak detachments promoted the decoupled and ladder-like deformation of the thrust belt, where the deformation above the slip layer extended further than it did below it. Rapid uplift and erosion at the thrust front contributed to the formation of a passive roof fault and a monocline in the upper layer, a series of forward and backward thin-skinned thrust-buried structures in the middle layer sandwiched between two weak detachments and stacking structures in the lower layer. (2) Erosion effectively prevents the deformation from propagating above the upper detachment, but can advance a horizontal transition in the deformation style generated within the middle brittle layer: from oblique and tight fault propagation folds to symmetrical, wide, and gentle detachment folds. (3) The model results consistent with tectonic deformation in the NW Sichuan Basin indicate a possible evolutionary mechanism under compression. There is hierarchical deformation of uncoordinated contraction controlled by the Lower Triassic and Early Cambrian weak layers, with the characteristics of the shallow monocline, the middle thin-skinned thrusts, and the deeper basement-involved folds. Continuous compression contributed a sequential pattern of steps as a whole, from the frontalpiedmont zones to the foreland basin, autochthonous stacking thrusts, and the huge buried structure in the NW Sichuan Basin. During the Himalayan period, syntectonic erosion along with the uplifted thrust front maintained the development of a passive-roof duplex and a huge forward buried structure.
Dissertations / Theses on the topic "Thin ladder deformation"
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Chakraborty, Rana. "Aspects of thin ladder mechanical design and development for a linear collider vertex detector." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275555.
Full textConference papers on the topic "Thin ladder deformation"
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Wodin-Schwartz, Sarah, Robert Bove, Paul Verghese, and Eugenia Kennedy. "Falling Body Impact Behavior of Fiberglass Stepladders With Plastic Knee Braces." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51927.
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According to estimates reported in the U.S. Consumer Product Safety Commission’s National Electronic Injury Surveillance System, there were greater than 10,000 stepladder related injuries treated in hospital emergency rooms nationwide per year in the period from 2009 through 2013. Research and experience have sought to correlate specific stepladder damage patterns to the causes of some injuries involving stepladders. Prior studies have associated a specific damage pattern — inward deformation of the stepladder’s front side rails — with impact loading of a user’s body onto the lower portion of a front side rail following a fall from the stepladder. Those prior studies were conducted using stepladders with metal knee braces and with the ladder cap simply supported during impact testing. Currently sold fiberglass stepladders often have plastic rather than metal knee braces. In our study, side rail impact testing was performed in order to evaluate how a design change from metal knee braces to plastic knee braces affects impact damage patterns in fiberglass stepladders. Biomechanics simulations were used to inform the selection of the weights used for impact testing and allowed the test results to be evaluated in the context of potential body contact scenarios that could produce equivalent loading of the side rail. Our study demonstrates that depending on the weight of the impacting body, fiberglass ladders with plastic knee braces show different dynamic responses to impact loading than do their metal counterparts. Additionally, the test methods in this study incorporate realistic dynamics in that the weight impacted the lower portion of the stepladder’s front side rail while the stepladder was actively tipping with only two of its feet in contact with the ground and with the top cap unsupported. The results indicate that ladders with metal knee braces can permanently deform when impacted with loads less than that required to permanently deform the ladders tested with plastic knee braces. The absence of permanent side rail deformation in the plastic knee braced stepladders tested even after undergoing significant elastic deformation during testing gives rise to new questions about the potential for damage that is not observable based on a visual examination.
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Van Bree, Michael P., Erick H. Knox, Kenneth M. Smith, and Joseph T. Eganhouse. "Stepladder Spreader Bar Structural Integrity and the Impact on Accidents." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11487.
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Ladder accidents involving stepladders usually reveal damage to the spreader bars. This paper addresses the sufficiency of the present stepladder safety standards, design and testing requirements related to spreader bars. Spreader bars are the hinge members affixed to the sides of the stepladder that facilitate folding. Post-accident observation of buckled spreader bars or detachment from the side rails is frequently suggested as the cause of a user’s fall and injury. In addition to complete detachment at an end of one or both spreaders, several different bending configurations to varying degrees have been observed during accident investigations. These include bars bent into an “S” shape, bars bowed out/in, and bars with compound bending. In order to study these various post accident spreader conditions, stepladders of different size, weight ratings (i.e. types III (200 lb.), II (225 lb.), I (250 lb.), etc.) and material (wood, aluminum and fiberglass) were instrumented with strain gages in relevant locations to monitor stresses during normal use and misuse, as well as during various load tests and during live user falls from ladders. This extensive measurement experience of multiple loading configurations empirically demonstrated that spreader bar forces were minimal both in normal use, and even some circumstances of misuse. The resulting stress does not result in disconnection or deformation. Conversely, the loading of the stepladder structure that occurs in a tip over accident was observed to be more than sufficient to cause the frequently-identified post accident spreader bar damage patterns. On ladders that meet the applicable safety standards, all post accident spreader bar damage was found to be the result of the accident and not the cause.
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Ghaith, Fadi A. "Nonlinear Dynamic Modeling of Elastic Beam Fixed on a Moving Cart and Carrying Lumped Tip Mass Subjected to External Periodic Force." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-86318.
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In the present work, a Bernoulli – Euler beam fixed on a moving cart and carrying lumped tip mass subjected to external periodic force is considered. Such a model could describe the motion of structures like forklift vehicles or ladder cars that carry heavy loads and military airplane wings with storage loads on their span. The nonlinear equations of motion which describe the global motion as well as the vibration motion were derived using Lagrangian approach under the inextensibility condition. In order to investigate the influence of the axial movement of the cart on the response of the system, unconstrained modal analysis has been carried out, and accurate mode shapes of the beam deflection were obtained. The assumed mode method was utilized for approximating the beam elastic deformation based on the single unconstrained mode shapes. Numerical simulation has been carried out to estimate the open-loop response of the nonlinear beam-mass-cart model as well as for the simplified linear model under the influence of the periodic excitation force. Also a comparison study between the responses of the linear and nonlinear models was established. It was shown that the maximum values of the beam tip deflection estimated from the nonlinear model are lower than the corresponding values obtained via the linear model, which reveals the importance of considering nonlinear hardening term in formulating the equations of motion for such system in order to come with more accurate and reliable model.
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Chen, Zhijian, Andrzej Przekwas, and Mahesh Athavale. "Physics Based Simulation of Large Size Particle Transport in Biomedical Applications." In ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/mnhmt2012-75216.
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In biomedical microdevices and medical applications there is a need to analyze fluid transport of solid structures with sizes comparable to channel dimensions. Examples include manipulation of biological cells in microfluidic devices or transport of thrombin particles in blood vessels. Computational modeling of such macroparticles is very difficult when the particle size is bigger than the size of the computational control volume (mesh element). In performing such simulations, conventional Lagrangian model of micro particles is not suitable since this approach doesn’t account particle’s volume blockage of the supporting Eulerian computational mesh. Other approaches such as deforming mesh or volume of fluid are either impractical of computationally very intensive or limited to structured meshes. We have developed a ‘macroparticle’ methodology where the large particle is represented as a large cluster of smaller particles (marker particles) that is “embedded” on a background computational grid. The macroparticle is then represented by blocking the cells in the background mesh that are overlapped by individual micro-particles. The discrete surface of the macroparticle is represented by partially or fully blocked cells of the background computational mesh. The translation /rotation/deformation motion of the macroparticle is calculated using a 6-DOF model with fluid pressure and shear forces acting on the particle surface used as forces and moments in calculating macroparticle position, velocity, acceleration and rotation. The size of the background grid determines the accuracy of the particle shape definition and the flow solution. The relevant physics and chemical conservation laws for each macroparticle are solved in a coupled, iterative method with the equation systems governing the background fluid domain. This methodology has been successfully used for simulations of macroparticle-laden fluids in micro channels in biochips. As an application of this novel method, we have applied this technology to simulate a moving clot in blood flow and process of clot mechanical dissolution (thrombolysis).
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Kaneshima, Takuma, Fuqiao Bai, and Nobuo Morita. "Comprehensive Analysis of Borehole Stability with Temperature, Swelling, and Pore Pressure Change for Layered and Orthotropic Formations." In SPE/IADC International Drilling Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/204068-ms.
Full textAbstract:
Abstract Borehole stability depends on various parameters such as rock strength, rock deformations, in-situ stress, borehole trajectory, shale swelling, pore pressure change due to osmosis, overbalance mud weight and temperature. The objective of this work is to construct analytical and numerical equations to predict borehole failure including all these parameters, and to comprehensively propose a methodology to improve the borehole stability. Analytical solutions are developed for inclined wells with respect to in-situ stress, shale swelling, pore pressure change due to osmosis, overbalance mud weight and temperature. A numerical model is developed for 3D inclined wells with orthotropic formation and layered formation. Using the analytical and the numerical models, stress state around inclined wells are evaluated. The breakout angle is predicted based on Mohr-Coulomb, Mogi, Lade and Drucker-Prager failure theories. Polar diagrams of mud weights are compared to judge the effect of each parameter and the magnitude predicted by the different failure theories. Shale swelling and pore pressure change due to osmosis are the most difficult to estimate among above-mentioned parameters. The laboratory measured swelling of cores obtained from various formations showed that the magnitude to induce breakouts caused by swelling was the largest comparing with other parameters. Therefore, when shale stability problems occur, we need to estimate the magnitude of shale swelling and osmosis due to water potential difference. Then, to overcome the shale stability problem, we evaluated the sensitivity of human controllable parameters on borehole stability. The parameters which can be controlled by drilling engineers are overbalance, type of mud, borehole temperature and borehole trajectory. If the shale swelling is small, the borehole stability is improved by the mud weight. However, from the swelling tests from the cores of Nankai-Trough, we estimated unless we used a swelling inhibitor to reduce the swelling less than 0.1%, the well was not possible to drill through. Actually, the well was abandoned due to instability after trying side track several times. Unlike previous works, this paper uses all important parameters (swelling, temperature, pore pressure, orthotropic formation, layered formation) to estimate the stresses around inclined wells with the same formation conditions for quantitative analysis. Failure analysis include Mohr, Mogi, Lade and Drucker-Prager. Finally, the polar diagrams of critical mud weight are used to judge whether we can choose well trajectory, orientation with respect to bedding planes, mud weight, shale inhibitor, and temperature to stabilize the borehole.
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Xie, Jun, Jizhou Tang, Sijie Sun, Yuwei Li, Yi Song, Haoyong Huang, Hao Pei, and Fengshou Zhang. "Numerical Investigation of Proppant Transport and Placement Along Opened Bedding Interfaces." In SPE Western Regional Meeting. SPE, 2021. http://dx.doi.org/10.2118/200801-ms.
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Abstract Slurry, as a proppant-laden fluid for hydraulic fracturing, is pumped into initial perforated cracks to generate a conductive pathway for hydrocarbon movement. Recently, numerous studies have been done to investigate mechanisms of proppant transport within vertical fractures. However, the distribution of proppant during stimulation becomes much more complicated if bedding planes (BPs), natural fractures (NFs) or other discontinuities pervasively distributed throughout the formation. Thus, how to capture the transport and placement mechanisms of proppant particles in the opened BPs becomes a significant issue. In this paper, we propose a closed-form continuous proppant transport model based on the conservation of total proppant volume and sedimentation of proppant particles. This model enables to integrate with the fluid flow section of a 3-D hydro-mechanical coupled fracture propagation model and then predict the distribution of proppant velocity and slurry volume fraction within a dynamic fracture network. Stokes’ law is applied to determine the sedimentation velocity. In the fracture propagation model, rock deformation is governed by the analytical solution of penny-shaped crack to determine fracture width. Fluid flow is characterized by finite differentiation scheme and then the fluid velocity is obtained. These two parameters above are inputs for the proppant transport model and both slurry viscosity and density are updated in this step. Afterwards, both fracture width and fluid velocity would be altered in the fracture model. Analysis of the proppant distribution within crossing-shaped fracture is conducted to study mechanisms of proppant transport along opened BPs. From our numerical analysis, we find that the distribution of proppant concentration is independent with the fluid viscosity, but highly dependent on the volume fraction of pumping slurry, under a given pumping pressure. Due to the difference of viscosity and proppant volume fraction at locations of upper and lower BPs, we observe that two symmetric BPs are unevenly opened, with different channel length along BP. Moreover, the width of opened upper BP is much smaller than that of opened lower BP as a result of discrepancy of proppant sedimentation. Last but not the least, a criterion of flow bed mobilization is established for dynamically tracking the sedimentation along the BP. Then the effect of different parameters (such as proppant size, proppant density, fluid viscosity, injection rate) on proppant distribution along opened BPs is also studied. Our model fully considers the proppant transport and settlement, proppant bed formation and interaction between fracture and proppant, which helps to predict the influence of proppant during fracturing treatment. Additionally, our model is also capable of dynamically tracking the settlement of proppant along opened BPs.