Thematische Bibliographien / Conical pipe ends expanding

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Auswahl der wissenschaftlichen Literatur zum Thema „Conical pipe ends expanding“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 10. Februar 2022

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Zeitschriftenartikel zum Thema "Conical pipe ends expanding"

Razooqi, Ahmed Ibrahim. „Experimental and Numerical Analysis of Expanded Pipe using Rigid Conical Shape“. Journal of Engineering 24, Nr. 8 (28.07.2018): 106. http://dx.doi.org/10.31026/j.eng.2018.08.09.

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The experimental and numerical analysis was performed on pipes suffering large plastic deformation through expanding them using rigid conical shaped mandrels, with three different cone angles (15◦, 25◦, 35◦) and diameters (15, 17, 20) mm. The experimental test for the strain results investigated the expanded areas. A numerical solution of the pipes expansion process was also investigated using the commercial finite element software ANSYS. The strains were measured for each case experimentally by stamping the mesh on the pipe after expanding, then compared with Ansys results. No cracks were generated during the process with the selected angles. It can be concluded that the strain decreased with greater angles of conical shape and an increase in expansion ratio results in an increase of expansion force and a decrease in the pipe thickness and length resulting in pipe thinning and shortening. Good agreement is evident between experimental and ANSYS results within discrepancy (16.90017%) in the X direction and (27.68698%) in the Y direction. Also, the stress distribution is investigated and it can be concluded that the case of Diameter (Do cone) = 35mm and (A) = α = 15° is the optimum.

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Ono, Manabu, Manabu Otsuki und Shigeo Kato. „A Study of an In-Pipe Microrobot Having Bulging Friction Brakes“. Journal of Robotics and Mechatronics 17, Nr. 3 (20.06.2005): 255–61. http://dx.doi.org/10.20965/jrm.2005.p0255.

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We discuss fabrication of a new microrobot consisting of two outer stabilizers structured by a rubber bellows having four or six rubber bulging rubber friction brakes and a center mover that drives the microrobot by expanding and contracting. We studied friction generated by friction brakes modeled as a simple beam fixed at both ends. Friction generated by stabilizer is confirmed to be predictable. The fabricated microrobot moves in a pipe in which the friction factor is 0.34, confirmed by navigating a porcine intestine.

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Wu, Zhong Ye, Xiang Jun Fang und Wen Long Sun. „Numerical Analysis of Hot Ends Length Effect on the Performance of Energy Separation in Vortex Tube“. Advanced Materials Research 732-733 (August 2013): 120–26. http://dx.doi.org/10.4028/www.scientific.net/amr.732-733.120.

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In this paper, effects of the vortex tube hot end lengths on the performance are studied, using a three-dimensional numerical fluid dynamic model. The hot end and cold end structure of vortex tube adapts the conical tube with the dilated side connecting a straight pipe. Structural mesh is employed. Different turbulence models are used, compared with experiment, considered of convergence and computing time, eventually, SST model is applied. In contrast to experimental data, numerical results are acceptable. By numerical analysis, it is observed that as the length of hot ends increases, the performance of energy separation increases significantly. However, while the length diameter ratio is more than 20, the performance does not increase any more. Even, it begins to decrease. Meanwhile, different hot end lengths flow is compared, and attemptable analysis is conducted to the flow phenomenon.

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Dissertationen zum Thema "Conical pipe ends expanding"

Ujčík, Miroslav. „Návrh automatického lisu“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443743.

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The master's thesis deals with the design of a press, which will be part of a robotic workplace. This workplace is designed for a company operating as a subcontractor for the automotive industry, for which automation is one of the most important processes of development and increasing labor productivity. The robotized cell is part of a line for heat treatment of plastic tube semi-finished products. The cell itself is used to press the conical extension of the pipe ends using a steel mandrel. In order to manipulate the parts, the corresponding end effectors of robots are designed in the work, which safely load and remove parts from the automated press. Design and control calculations are supplemented by finite element strength analysis in Solidworks. A drawing documentation is also made in this program. The work is performed with regard to the requirements of technologists and the quality department.

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Konferenzberichte zum Thema "Conical pipe ends expanding"

Luviano-Ortiz, J. Luis, Eduardo Ramos, Abel Hernandez-Guerrero und Jose-Manuel Luna. „Incompresible Periodically Reversing Flow in a Conical Pipeline of Finite Length“. In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11208.

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A numerical three-dimensional study has been carried out to analyze the hydrodynamic behavior of an incompressible periodically-reversing flow in a conical pipeline of finite length. In order to generate the oscillatory flow, a two pistons-driven pipe flow was established (the pistons were placed at the ends of the pipeline.) In the smaller piston the Womersley number was set to 16 while the axial displacement/diameter ratio was set to 1. The hydrodynamic flow behavior is considered and discussed for the accelerating and decelerating phases of the cycle. The numerical results show the generation of vortices for different penetration lengths. One of the most representative results is that in the position of 183.25°, after the pistons reach their maximum displacement, the flow pattern loses the axial symmetry that had appeared for previous phases of the cycle.

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Kuroda, Kouichi, Tsutomu Arita, Takahiro Takano, Hajime Oosako, Tatsuya Okui und Masayoshi Akiyama. „New Cold-Expansion Process for End Sizing and Dimensional Precision of Inside Geometry on Both Ends of Line Pipes“. In ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2007. http://dx.doi.org/10.1115/omae2007-29232.

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Cold-expansion process has been developed for ensuring dimensional precision of inside geometry on the end portions of line pipe. For expanding the inside diameter of line pipe, a plug insertion method by cold press in the axial direction from the end side was finally adopted. As the nature of end sizing operation, only very small amount of cold plastic strain is applicable by cold expansion, and in order to realize the high dimensional precision of end portion a special geometry of the plug had to be designed. If a single-taper plug is adopted the expanded portion tends to overshoot and the inside diameter of expanded portion is larger than the plug diameter. The new plug design allows smooth contact of the inside surface expanded by the inlet portion of the plug on the bearing portion of the plug and no overshooting phenomenon occurs. One of the simplest designs of this type of plug for practical use is a double-taper plug, and finite element method was carried out in order to determine the practical range of the plug geometry referring to the deep insight on the mechanism of expansion process.

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Sun, Qin, Jian Qu, Jianping Yuan, Hai Wang und Scott M. Thompson. „Fluid Flow and Heat Transfer Characteristics of Micro Oscillating Heat Pipes With and Without Expanding Channels“. In ASME 2019 6th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/mnhmt2019-3976.

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Abstract The oscillating heat pipe is considered a promising candidate for high-efficiency and compact thermal control for next-generation electronics. In this paper, the visualized flow and heat transfer characteristics of two silicon-based micro oscillating heat pipes (micro-OHPs) with expanding and straight channels, respectively, were experimentally investigated. The overall size of these two micro-OHPs are both 28 mm × 23 mm × 1.025 mm and have thirty rectangular cross-section channels. The hydraulic diameter of parallel direct channel is 332.4 μm, while they are about 364.4 and 287.0 μm at the two ends of expanding channel, respectively. R141b was used as the working fluid with the volumetric filling ratio of 50%. Inside these two micro-devices, the fluid oscillating motion, including unidirectional movement and intermittent stopovers, was observed at the quasi-steady oscillation state, accompanied by bubbly flow, slug flow and annular/semi-annular flow in microchannels. The micro-OHP with expanding channels possessed better thermal performance and could achieve ephemeral circulation flow, while poorer heat transfer performance occurred for the micro-OHP with straight channels due to more localized slug/plug oscillations and intermittent stopovers. The oscillating amplitudes of liquid slugs are presented to estimate the flow behavior of working fluid inside micro-OHPs. The introduction of expanding channels in a micro-OHP is beneficial for realizing the more robust oscillating motion of liquid slugs with larger oscillating amplitudes for heat transfer enhancement.

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Mekha, Basim, und Shankar Bhat. „Newer Frontiers in the Design of Steel Catenary Risers for Floating Production Systems“. In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-11562.

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It is not uncommon nowadays to have a new floating production facility installed with steel catenary risers (SCRs) as the main method for receiving and exporting fluids. The use of steel catenary in deeper and shallower waters alike where it was challenging and even unthinkable some years back is now feasible. Advancements in the SCR technology cover not only design and software, but also manufacturing, installation methods and capabilities. Since the first author’s OMAE 2001 paper “New Frontiers in the Design of Steel Catenary Risers for Floating Production Systems” [1] was published, a number of significant advances have been made in the design, manufacture and installation of steel catenary risers. In design aspects for example, the soil structure interaction and modeling of soil stiffness and trench formation has been the topic of many publications and research. The manufacturing capabilities of the pipe mills to produce and machine SCR pipe joints with upset ends has been advanced and implemented in recent projects. Advancement in the capability of Automated Ultrasonic Testing (AUT) systems to detect very small flaws in thick carbon steel and clad pipe welds is expanding the manufacturing envelop of SCRs while meeting design requirements. In addition, there is improvement in the capabilities of installation vessels; and more comprehensive material and fatigue test data have been accumulated providing data better basis to design and perform fracture mechanics analysis of SCRs. Lazy wave SCR configurations are being used to significantly expand the application of SCR technology to high motion vessels and more severe environments. This paper contains a review of the current state of the art with a description of some of the important advancements that have extended the range of applicability of SCR technology. The SCR technology advancements presented and discussed in this paper include a better understanding of the soil behavior and trench formation with some analytical results, the use of upset ends and their manufacturing options, improvement in the AUT systems and flaw detection capabilities, CRA clad SCRs and Lazy Wave SCRs.

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DeVito, Anthony, Alex Krutovskiy und Leszek Czajkowski. „LaGuardia Airport Design Build Extends Runway Decks for Safety Improvement“. In IABSE Congress, New York, New York 2019: The Evolving Metropolis. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.2229.

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Land is scarce near LaGuardia airport, a major and unique component of NYC's urban infrastructure, and the safety of air passengers and neighboring Queens NY residents was of paramount importance in the design. The challenge of expanding the runways was met with design-build for both quick and efficient design and construction which could also accommodate future regional growth.The purpose of the LGA Runway Extension Project is to extend the existing runways into Flushing Bay as a safety area improvement to support Engineered Material Arresting System (EMAS) - a crushable material installed at the runway ends to increase safety by reducing the risk of a plane overrun during takeoff.The new runway deck extensions are marine concrete structures which utilize precast prestressed pile caps with a composite precast deck and CIP concrete topping slab. The concrete decks are supported by 250 ton steel pipe piles with coatings, wraps and zinc anodes for corrosion protection.This paper provides a description of the runway extensions and a detailed account of technical and logistical challenges overcome: deck design for aircraft and impact load, replacing the Approach Lighting Systems, optimizing the pile hammer selection and coordination with the PANYNJ, FAA and stakeholders.

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