Analysis Of Bolted Joints At High Temperature
DOWNLOAD
Download Analysis Of Bolted Joints At High Temperature PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Analysis Of Bolted Joints At High Temperature book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Analysis Of Bolted Joints At High Temperature
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1938
Analysis Of Bolted Joints At High Temperature written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1938 with categories.
High Temperature Bolted Joint With Thermal Distortion
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2020
High Temperature Bolted Joint With Thermal Distortion written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with Bolted joints categories.
Bolt mechanics has been developed over thousands of years. Today, bolted joints researchers and designers are still facing challenges in many areas especially when a joint works at elevated temperatures. Temperature changes of a bolted joint in such systems induce catastrophic cyclic axial and bending strain to the fasteners and gasket degradation. Now, with many studies, the axial strain issue can be addressed by adjusting the clamping load to maintain the stiffness of the joint or by changing the jointed materials to have appropriate coefficient of thermal expansions (CTE) to have a suitable clamping load. Dealing with the bending strain caused by cyclic thermal changes, however, is more complicated. It is still a big challenge for engine designers and fastener researchers. During heat up and cool down, most bolted joints have dissimilar thermal expansion rate of jointed components or different temperature profiles which will cause bolted joint expansion or contraction motions in axial and transverse directions. The amplitude of the bolt transverse motion is called bending motion in this dissertation which is associated with the relative motions between jointed components and bolt head. Friction force acting on the bolt head bearing area causes the bolt bending motion resulting in bolt bending fatigue. In this research, mathematical modeling and FEA methods have been employed to specify the design space based on the high temperature bolted joint operating conditions. The design target can be defined based on design control factors including demission, materials and operating temperature of the bolted joint. With this developed method, a specific high temperature bolted joint has been designed with a frictional target of the bolted joint. To meet this target, a series of tribological bench tests were conducted to evaluate washer with different coatings which have potential good high temperature characteristics under different temperatures. A washer with CrN46 multi-layer coating was found to close to the design target which was effective under high pressure and high temperature with a relatively low coefficient of friction. The tested coating has been analyzed after test and found that, with the aid of the formation of W2C, tungsten could allow the DLC coating to perform well under high temperature environment. This verified J. Luthin and C. Linsmeier finding that the W2C formation starts at 500°C. Delamination is the main wear mechanism for the CrN46 coating, but the wear depth met the design requirement which was 1500 reciprocating cycles. A sensitivity study using Taguchi method was conducted and showed that the dry coefficient of friction depends on many factors, including temperature, materials, surface finishing and sliding speed. The material is the most significant design control factor, which affects the friction coefficient. The CrN46 coasting sliding against CrN46 coasting was found to provide even lower coefficient of friction which was used in the design. Then the design of the joint with the coated washer was validated by engine dyno data which was collected by a novel mutli-camera 3D-DIC system developed in this research. This might be the first time 3D-DIC system has been successfully applied in an engine dyno to measure the displacement of the exhaust manifold and fasteners exposed to high temperatures, mechanical and dynamic loads. This application illustrated that a 3D-DIC system could be applied in a severe thermal and vibration environment with a proper system design. The data collected by the 3D-DIC system was compared to traditional LVDT data. It showed that 3D-DIC was reliable and could provide whole field contour data. The measured data has been used to validate the CAE analysis and improve the computational methodology. Measuring the strain field was still a challenge for this 3D-DIC system because of the high thermal strain generated at high temperature. A high-resolution speckle pattern was needed as well. To systematically address the high temperature bolt joint with thermal deformation, a robust CAE method for the MLS gasket design has been developed to overcome the current design method which was not an effective method to evaluate MLS gasket sealing performance with consideration of gasket material thermal degradation. A new method was developed in this research. In the new method, a thermal degradation factor was used to correct the gasket sealing pressure calculated by the current CAE method. With the new method, it was found that a gasket with high thermal degradation resistance showed better sealing performance than a gasket with low thermal degradation resistance, while the current CAE method could not have predicted any difference. The results from the new method matched with the dyno real engine test observation very well and can be used for high temperature bolted joint designs. Overall, this research found a metrology to predefine a friction requirement and a robust "engineed refiles"/"engineered coated washer" to provide a robust hig temperature bolted joint design. Four main sections were focused on in this research. The first was developing a systematic method which combined virtual analyses with bench tests to develop a low friction coated washer to solve the bolt bending fatigue issue due to the engine cyclic thermal changes. The second was to design tests to validate the performance of the low friction coated washer to meet the predefined frictional requirements. The third was to improve a process for virtual analysis for the high temperature bolted joint with more accurate temperature simulation and frictional interface model. The fourth was to develop a method to predict the gasket sealing behavior at the elevated temperature when considering the creep and relaxation of the bolted joint. The objective of this research has been met by the complete of the below tasks. 1. Developed a systematic method for designing a high temperature bolted joint for bolt bending fatigue. 2. A coating has been developed and evaluated by a series of A bench tests to solve the bolt bending fatigue issue due to the engine cyclic thermal changes. 3. A unique multi-camera 3D-DIC system has been successfully designed and applied in an engine dyno to measure the displacement of the exhaust manifold and fasteners exposed to high temperatures, mechanical and dynamic loads. 4. Virtual analysis method for the high temperature bolted joint has been improved with more accurate temperature simulation and frictional interface model. 5. Developed a method to predict the gasket sealing behavior at the elevated temperature with consideration of the creep and relaxation of the bolted joint. 6. Design and method have been validated by engine dyno tests.
Performance Of Bolting Materials In High Temperature Plant Applications
DOWNLOAD
Author : Andrew Strang
language : en
Publisher: CRC Press
Release Date : 2019-11-29
Performance Of Bolting Materials In High Temperature Plant Applications written by Andrew Strang and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-11-29 with categories.
This book discusses the technology of high-temperature bolting materials and the design considerations of high-temperature bolted joints. It is based on the second international conference on high-temperature creep resistant materials held in York.
Analysis Of The Effects Of Temperature On Bolted Joints
DOWNLOAD
Author : Warren Brown
language : en
Publisher:
Release Date : 2006-04-01
Analysis Of The Effects Of Temperature On Bolted Joints written by Warren Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-04-01 with categories.
Analysis Of Bolted Joints
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2004
Analysis Of Bolted Joints written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Bolted joints categories.
The Mechanics Of Threaded Fasteners And Bolted Joints For Engineering And Design
DOWNLOAD
Author : Toshimichi Fukuoka
language : en
Publisher: Elsevier
Release Date : 2022-10-22
The Mechanics Of Threaded Fasteners And Bolted Joints For Engineering And Design written by Toshimichi Fukuoka and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-10-22 with Science categories.
The Mechanics of Threaded Fasteners and Bolted Joints outlines how threaded fasteners and bolted joints fail, how these failures can be remedied, and ultimately how to avoid them altogether through tightening methods, material strength, and avoiding loosening. The book demonstrates how to select the appropriate tightening method and determine the optimal tightening procedure for varying nominal diameters. Using the finite element method, it discusses characteristics of stress concentration and fatigue strength and covers bolt force variation due to elastic interaction. The separation of the plate interface via increased external force as the primary cause of fatigue failure in threaded fasteners is discussed, with effective countermeasures provided. Empirical equations of thermal contact coefficient and apparent thermal contact coefficient in simple form are included as well.?? Outlines various tightening methods such as torque control, angle control, direct tension, and thermal expansion Demonstrates methods for preventing fatigue failure Discusses the effect of high and low temperature thermal loads on the strength of bolted joints by looking at thermal contact resistance at the interface
Handbook Of Bolts And Bolted Joints
DOWNLOAD
Author : John Bickford
language : en
Publisher: CRC Press
Release Date : 1998-04-28
Handbook Of Bolts And Bolted Joints written by John Bickford and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-04-28 with Science categories.
Presenting time-tested standard as well as reliable emerging knowledge on threaded fasteners and joints, this book covers how to select parts and materials, predict behavior, control assembly processes, and solve on-the-job problems. It examines key issues affecting bolting in the automotive, pressure vessel, petrochemical, aerospace, and structural steel industries. The editors have successfully created a useful rather than scholarly handbook with chapters written in a straightforward, how-to-do-it manner. Theory is discussed only when necessary and the handbook's logical organization and thorough index enhances its usefulness.
Performance Of Bolting Materials In High Temperature Plant Applications
DOWNLOAD
Author : A. Strang
language : en
Publisher: CRC Press
Release Date : 1995
Performance Of Bolting Materials In High Temperature Plant Applications written by A. Strang and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with House & Home categories.
Topics covered in this volume directly address the application and performance of bolting materials in high temperature plant. In such applications, bolts are often required to operate for long periods of time under high duty plant operational conditions. Performance and material reliability are, therefore, important factors in the selection of suitable alloys.
Analysis Of Bolted Joints 2003
DOWNLOAD
Author : Abdel-Hakim Bouzid
language : en
Publisher:
Release Date : 2003
Analysis Of Bolted Joints 2003 written by Abdel-Hakim Bouzid and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Technology & Engineering categories.
Annotation This entry in the proceedings series from the July 2003 conference discusses both computer methods for the analysis of bolted joints and the results of recent experimental investigations. Topics include the tightening sequence for bolted flange joint assembly, the effect of helical coil repair on the fatigue life of studs, the calculation of bolted flange connections of floating and metal-to-metal contact type, finite element analysis of the thermal and mechanical behaviors of bolted joints, and a web-enabled database for gasket parameters. No subject index is provided. Annotation (c)2003 Book News, Inc., Portland, OR (booknews.com).
Analysis Of Bolted Joints 2001
DOWNLOAD
Author : K. H. Hsu
language : en
Publisher:
Release Date : 2001
Analysis Of Bolted Joints 2001 written by K. H. Hsu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Science categories.