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Dissertations / Theses on the topic 'Autofrettage'

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1

Badr, Elie Antoine. "Estimation of residual stresses induced by autofrettage with an experimental evaluation of the autofrettage process in crossbores of positive displacement pumps /." Access abstract and link to full text, 1994. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9500703.

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2

Leutwein, Hans-Ulrich. "Einfluss von Autofrettage auf die Schwingfestigkeit innendruck-belasteter Bauteile aus Kugelgraphitguss." Ilmenau Univ.-Verl, 2008. http://d-nb.info/990666093/04.

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3

Lechmann, Marcus. "Entwicklung eines schwingbruchmechanischen Auslegungskonzeptes für innendruckbeanspruchte Bauteile mit ausgeprägten Druckeigenspannungsfeldern." [S.l. : s.n.], 2007. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-34829.

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4

Leutwein, Hans-Ulrich [Verfasser]. "Einfluss von Autofrettage auf die Schwingfestigkeit innendruck-belasteter Bauteile aus Kugelgraphitguss / Hans-Ulrich Leutwein." Ilmenau : Univ.-Verl, 2008. http://d-nb.info/992624371/34.

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5

Kerzreho, Corentin. "Caractérisation et optimisation d'une batterie électromécanique sous chargement cyclique." Cachan, Ecole normale supérieure, 2002. http://www.theses.fr/2002DENS0002.

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Ce travail s'insère dans un projet pluridisciplinaire regroupant des mécaniciens et des électrotechniciens. Il a permis de prédéfinir un module intégré de batterie électromécanique, de 3kWh pour 3kW, dans lequel l'énergie est accumulée sous forme cinétique. Ses principales caractéristiques sont un rendement élevé, une durée de vie importante et un temps de décharge minimal supérieur à l'heure. De faible coût, la batterie doit permettre de sécuriser et de réguler l'approvisionnement en courant d'un foyer ou d'un site isolé et s'associer à des moyens de production d'énergie alternative. Après un
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6

Yang, Shuilong. "Experimental and analytical investigation of the effect of autofrettage on fatique damage development in blocks containing crossbores under cyclic internal pressure /." Access abstract and link to full text, 1995. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9528551.

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7

Belloto, Humberto Jesuino. "Análise de falhas em tubos sem costura de aço St52 utilizados em motores diesel." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265045.

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Orientador: Paulo Roberto Mei<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-19T00:26:25Z (GMT). No. of bitstreams: 1 Belloto_HumbertoJesuino_M.pdf: 5308190 bytes, checksum: 1a5267190a7db08ed3b659370b64f95a (MD5) Previous issue date: 2011<br>Resumo: O tubo de aço carbono com alto teor de manganês St52 (Norma DIN 1.0580) sem costura, com 8 mm de diâmetro externo e 3 mm de diâmetro interno, atualmente utilizado no sistema de combustível de motores eletrônicos a diesel com pressões de trabalho de até 1300 ba
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8

Blaha, Jakub. "Výpočtová analýza zbytkových napětí u autofretovaných vysokotlakých zásobníků paliva." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231712.

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The master‘s thesis is aimed on numerical simulation of autofrettage of high pressure fuel vessel – rail in Common Rail system. First there is described Chaboche model, which is later used for simulation of autofrettage. There are described different approaches which can be used to obtain sufficient material model. Then there is observed influence of these different approaches on stress state of rail within the process of autofrettage. Suitability of Chaboche model for autofrettage and re-autofrettage simulations is assessed by comparing with more complex Jiang model. In the end there is a stu
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9

Gibson, Michael C. "Determination of residual stress distributions in autofrettaged thick cylinders." Thesis, Cranfield University, 2008. http://dspace.lib.cranfield.ac.uk/handle/1826/2996.

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High pressure vessels such as gun barrels are autofrettaged in order to increase their operating pressure and fatigue life. Autofrettage causes plastic expansion of the inner section of the cylinder – setting up residual compressive stresses at the bore after relaxation. Subsequent application of pressure has to overcome these compressive stresses before tensile stresses can be developed, thereby increasing its fatigue lifetime and safe working pressure. A series of Finite Element (FE) models of hydraulic autofrettage were created, to establish the correct boundary conditions required and mean
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10

Plant, Robert C. A. "Stress intensity calibrations for eroded autofrettaged thick walled cylinders." Thesis, Open University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329536.

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11

Gibson, M. C. "Determination of Residual Stress Distributions in Autofrettaged Thick Cylinders." Thesis, Cranfield University, 2008. http://hdl.handle.net/1826/2996.

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High pressure vessels such as gun barrels are autofrettaged in order to increase their operating pressure and fatigue life. Autofrettage causes plastic expansion of the inner section of the cylinder – setting up residual compressive stresses at the bore after relaxation. Subsequent application of pressure has to overcome these compressive stresses before tensile stresses can be developed, thereby increasing its fatigue lifetime and safe working pressure. A series of Finite Element (FE) models of hydraulic autofrettage were created, to establish the correct boundary conditions required and mean
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12

Yang, Yi Lung, and 楊宜龍. "Process Automation System for Autofrettage of Tubes." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/14267039983325812389.

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碩士<br>國立臺北科技大學<br>機電整合研究所<br>92<br>Autofrettage is a fabrication technique used to in traduce pre-compression in a portion of tubes or pressure vessels in order to extend the usable strain range of the material and to enhance fatigue life of the structure. In this study, a supervisory control and data acquisition system for autofrettage of tubes has been developed. The architecture of PC based system includes the graphic monitoring system, data acquisition card, pressurization and control system, and the tubes needed for autofrettage. The goal of the system proposed is to improve the efficien
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13

Liu, Tien-Chih, and 劉天志. "Autofrettage Analysis of a Fibre-Reinforced Composite Tube Structure Autofrettage Analysis of a Fibre-Reinforced Composite Tube Structure Incorporated with SMA." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/50184943321022307490.

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博士<br>國防大學理工學院<br>國防科學研究所<br>98<br>For the pipe structure to withstand the internal pressure, the stresses between inner circle and outer circle of pipe wall is uneven due to the thickness of the wall. The thicker the wall, the greater the difference of stresses between inside and outside the wall. Therefore, this non-uniform stress distribution of pipe structure can not fully withstand the stress as it is expected. In the past, the applications of jacketed pipe or plastic deformation imposed pre-stress ways were used to improve the stress distribution of pipe structure. This study proposed a
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14

Hung, Kuei-Mei, and 黃桂美. "Study on Autofrettage Stress Analysis of 120 mm Steel Pipe of Nickel-Chromium-Molybdenum Alloy." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/h8f4fk.

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碩士<br>義守大學<br>機械與自動化工程學系<br>107<br>Nickel-chromium-molybdenum alloy steel pipe with excellent yield point and tensile strength has been widely used in transmission shafts, spindles, guns and other components. In response to the policy of weapons made by self in the future, this study aims to use the autofrettage stress analysis on the 120 mm nickel-chromium- molybdenum alloy steel smoothbore gun manufactured by Rheinmetall and explores the effect of autofrettage influencing on the firing stress of the gun. The stress analysis method, element unit method, the Le Duc method and the Rheinmetall a
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15

Li, Kuen-Ming, and 李貫銘. "Analysis of Residual Stresses in an Autofrettaged Gun Tube." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/40864378908016228989.

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碩士<br>國立臺灣大學<br>機械工程學系<br>85<br>A cannon can increase the effective range after the process of autofrettage of its gun tube. Autofrettage is a process in which a gun tube is subjected to an internal pressure which causes plasticdeformation at the tube's bore. After the removal of the internalpressure, a distribution of residual compressive stresses in thegun tube is generated and thus increases the limiting internalpressure during firing. In the thesis, the distribution of residual stres
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16

Abdelsalam, Ossama Ramy. "ANALYSIS AND OPTIMIZATION OF AUTOFRETTAGED AND SHRINK-FITTED COMPOUND CYLINDERS UNDER THERMO-MECHANICAL LOADS." Thesis, 2012. http://spectrum.library.concordia.ca/974966/4/Abdelsalam_PhD_F2012.pdf.

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Cylindrical shells have large industrial applications ranging from pressure vessels, engine cylinders and hydraulic chambers to chemical and power plants and they are typically subjected to severe mechanical or thermo-mechanical environmental conditions. The fatigue life, pressure and thermal load bearing capacities of thick-walled cylinders can be considerably improved by inducing near the bore compressive residual hoop stresses. Shrink-fit and autofrettage processes have been effectively applied to generate favorable compressive residual stresses. The main goal of this research study is to f
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