Bolt Head Fillet Stress Concentration Factors in Cylindrical Pressure Vessels PDF Download
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Author: Gowri Srinivasan
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
"Linear three dimensional finite element analysis was performed on bolted pressure vessel joints to determine maximum stresses and stress concentration factors in the bolt head fillet as a result of the prying action. The three dimensional finite element models consisted of a segment of the flanges containing one bolt, using cyclic symmetry boundary conditions. The flanges considered were each 20 mm in thickness, with 901.7 mm inner diameter and a constant internal pressure of 0.6895 MPa (100 psi). The outer flange diameter was varied from 1021 mm to 1041 mm in steps of 5 mm. The bolt circle diameter was varied from 960.2 mm to 980.2 mm in steps of 5 mm. The bolts used were 16 mm diameter metric bolts with standard head and nut thickness and the threads were not modeled. Stress concentration factors in the bolt head fillet were calculated and they ranged from 3.34 to 4.80. Stresses as well as the stress concentration factors in the bolt head fillet increase with an increase in bolt circle diameter for a given outer flange dimension. Keeping the bolt circle diameter the same, stresses and stress concentration factors in the bolt head fillet decrease with increase in outer flange diameter. The maximum stresses in the bolt were also calculated according to the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code and the Verein Deutscher Ingenieur (VDI) guidelines and compared to the results observed through finite element analysis. The stresses obtained through fea were larger than those predicted by the ASME and VDI methods by a factor that ranged between 2.96 to 3.41 (ASME) and 2.76 to 3.63 (VDI)"--Abstract, leaf iv
Author: Gowri Srinivasan
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
"Linear three dimensional finite element analysis was performed on bolted pressure vessel joints to determine maximum stresses and stress concentration factors in the bolt head fillet as a result of the prying action. The three dimensional finite element models consisted of a segment of the flanges containing one bolt, using cyclic symmetry boundary conditions. The flanges considered were each 20 mm in thickness, with 901.7 mm inner diameter and a constant internal pressure of 0.6895 MPa (100 psi). The outer flange diameter was varied from 1021 mm to 1041 mm in steps of 5 mm. The bolt circle diameter was varied from 960.2 mm to 980.2 mm in steps of 5 mm. The bolts used were 16 mm diameter metric bolts with standard head and nut thickness and the threads were not modeled. Stress concentration factors in the bolt head fillet were calculated and they ranged from 3.34 to 4.80. Stresses as well as the stress concentration factors in the bolt head fillet increase with an increase in bolt circle diameter for a given outer flange dimension. Keeping the bolt circle diameter the same, stresses and stress concentration factors in the bolt head fillet decrease with increase in outer flange diameter. The maximum stresses in the bolt were also calculated according to the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code and the Verein Deutscher Ingenieur (VDI) guidelines and compared to the results observed through finite element analysis. The stresses obtained through fea were larger than those predicted by the ASME and VDI methods by a factor that ranged between 2.96 to 3.41 (ASME) and 2.76 to 3.63 (VDI)"--Abstract, leaf iv
Author: Pir M. Toor
Publisher: ASTM International
ISBN: 0803134134
Category : Fasteners
Languages : en
Pages : 171
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Book Description
Annotation Eleven peer-reviewed papers provide the latest information on the structural integrity of fasteners, including the effect s of environmental and stress corrosion cracking. For Sections cover:Fatigue and Crack Growth Experimental Techniques?three papers cover the development of a fastener structural element test for certifying navy fasteners material; experimental crack growth behavior for aerospace application; and influence of cold rolling threads before and after heat treatment on the fatigue resistance of high strength coarse thread bolts for multiple preload conditions. Design/Environmental Effects?two papers examined the relationship between the tightening speed with friction and clamped-load; and the optimum thread rolling process that improves SCC resistance to improve quality of design. Fatigue and Crack Growth Analytical Techniques?three papers describe current analytical techniques for fatigue and crack growth evaluations of fasteners; a numerical crack growth model using the finite element analysis generated stress field; and s the resistance of high strength fine thread bolts for multiple preload conditions. Design Consideration?focuses on the comprehensive nonlinear 3D finite element model to simulate a displacement controlled for riveted structure; state-of-the-art fatigue crack growth analysis techniques which are used in various industries to damage tolerance evaluation of structures; and the material stress state within the thread of the bolt; and on each parameter affecting the structural integrity of a bolted joint.
Author: Amalia Martínez-García
Publisher: Springer
ISBN: 3319285130
Category : Technology & Engineering
Languages : en
Pages : 350
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Book Description
This book contains papers of the 5th International Symposium on Experimental Mechanics (5-ISEM) and the 9th Symposium on Optics in Industry (9-SOI), whose general theme is Emerging Challenges for Experimental Mechanics in Energy and Environmental Applications. These symposia are organized by Centro de Investigaciones en Optica (CIO) and Mexican Academy for Optics (AMO), under the sponsorship of the Society of Experimental Mechanics (SEM) and other national and international Organizations; Symposia are interdisciplinary forums for engineers, technicians, researchers and managers involved in all fields of Optics, Opto-mechatronics, Mechanics and Mechanical Engineering. · Addresses a broad readership including graduate and postgraduate students, researchers, and engineers working in experimental mechanics and in the application of optical methods · Covers a broad spectrum of topics highlighting the use of optical methods in experimental mechanics, energy, and in the environment
Author: Trent A. James
Publisher:
ISBN:
Category : Pressure vessels
Languages : en
Pages : 0
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Book Description
The purpose of the experimental work in this thesis is to observe the increase in stress introduced by an unreinforced circular hole in the wall of a cylinder subjected to internal pressure. From the stresses determined using wire resistance strain gauges, a set of curves showing stress concentration factors around the hole are presented. The results of this investigation indicate that the critical stress due to the hole is not always at the point fo in i by proceeding in the axial direction from the hole, and that flat plate theory is not a good basis for analysis unless the diamt h : of the hole is very small compared to the diameter of the cylinder, Experimental consideration of the stresses near tin hole showed that the disturbed area around the hole is of a lot al character, although not as small as commonly assumed.
Author: Zhuming Bi
Publisher: John Wiley & Sons
ISBN: 1119532531
Category : Technology & Engineering
Languages : en
Pages : 640
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Book Description
The bible of stress concentration factors—updated to reflect today's advances in stress analysis This book establishes and maintains a system of data classification for all the applications of stress and strain analysis, and expedites their synthesis into CAD applications. Filled with all of the latest developments in stress and strain analysis, this Fourth Edition presents stress concentration factors both graphically and with formulas, and the illustrated index allows readers to identify structures and shapes of interest based on the geometry and loading of the location of a stress concentration factor. Peterson's Stress Concentration Factors, Fourth Edition includes a thorough introduction of the theory and methods for static and fatigue design, quantification of stress and strain, research on stress concentration factors for weld joints and composite materials, and a new introduction to the systematic stress analysis approach using Finite Element Analysis (FEA). From notches and grooves to shoulder fillets and holes, readers will learn everything they need to know about stress concentration in one single volume. Peterson's is the practitioner's go-to stress concentration factors reference Includes completely revised introductory chapters on fundamentals of stress analysis; miscellaneous design elements; finite element analysis (FEA) for stress analysis Features new research on stress concentration factors related to weld joints and composite materials Takes a deep dive into the theory and methods for material characterization, quantification and analysis methods of stress and strain, and static and fatigue design Peterson's Stress Concentration Factors is an excellent book for all mechanical, civil, and structural engineers, and for all engineering students and researchers.
Author: J. Middleton
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
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Book Description
The problem of shape optimization to minimize stress concentration factors is presented. Design variables are chosen such that optimal configurations can be produced for a cylindrical pressure vessel with an end closure and nozzle intersection. A system model is formed in which the stress gradients are calculated numerically using the finite elements method and optimization is performed by the penalty function technique. Various examples of the design algorithm are presented showing optimal geometries together with plots of boundary stress concentrations for the sequence of designs generated. (Author).
Author: M. B. Bickell
Publisher:
ISBN:
Category : Pressure vessels
Languages : en
Pages : 602
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Author: S. S. Gill
Publisher: Elsevier
ISBN: 1483155420
Category : Science
Languages : en
Pages : 603
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Book Description
The Stress Analysis of Pressure Vessels and Pressure Vessel Components, Volume 3 deals with the basic principles and concepts underlying stress analysis of pressure vessels and related components used in the nuclear energy industry. Among the components subjected to stress analysis are pressure vessel branches, pressure vessel ends, local attachments, and flanges. Smooth and mitered pipe bends, externally pressurized vessels, and creep effects in structures are also analyzed. This book is comprised of 11 chapters that explore the main problems of structural analysis related to the design of metal pressure vessels and components. After introducing the reader to the basic principles of stress analysis, it turns to nozzles in pressure vessels. The shakedown analysis of radial nozzles in spheres is described for pressure, thrust, moment, shear, and combined loading. The problem of pressure vessel ends is treated next, along with local loads applied to pressure vessel shells at nozzles and local attachments such as support points. An analysis of pressure vessels using a computer is also presented. The final chapter describes the analysis of ligament stresses in pressure vessels and includes a discussion on arrays of holes with reinforcement. This volume will be of value to nuclear and structural engineers as well as designers and research workers in the nuclear industry.
Author:
Publisher:
ISBN:
Category : Composite construction
Languages : en
Pages : 230
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Author: Bradley Alan Bunyard
Publisher:
ISBN:
Category :
Languages : en
Pages : 63
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