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Book Residual Stresses in Weld Deposited Clad Pressure Vessels and Nozzles

Download or read book Residual Stresses in Weld Deposited Clad Pressure Vessels and Nozzles written by and published by . This book was released on 1998 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of through-thickness residual stress measurements are provided for a variety of samples of weld deposited 308/309L stainless steel and Alloy 600 cladding on low-alloy pressure vessel ferritic steels. Clad thicknesses between 5 and 9mm on samples that vary in thickness from 45 to 200mm were studied. The samples were taken from flat plates, from a spherical head of a pressure vessel, from a ring-segment of a nozzle bore, and from the transition radius between a nozzle and a pressure vessel shell. A layer removal method was used to measure the residual stresses. The effects of uncertainties in elastic constants (Youngs̀ modulus and Poissons̀ ratio) as well as experimental error are assessed. All measurements were done at room temperature. The results of this work indicate that curvature plays a significant role in cladding residual stress and that tensile residual stresses as high as the yield stress can be measured in the cladding material. Since the vessel from which the spherical and nozzle corner samples were taken was hydrotested, and the flat plate specimens were taken from specimens used in mechanical fatigue testing, these results suggest that rather high tensile residual stresses can be retained in the cladding material even after some mechanical loading associated with hydrotesting and that higher levels of hydrotest loading would be required to alter the cladding residual stresses.

Book Analysis of Residual Stresses and Distortions Resulting from Multi pass Welding of Nozzles to Cylindrical Pressure Vessels

Download or read book Analysis of Residual Stresses and Distortions Resulting from Multi pass Welding of Nozzles to Cylindrical Pressure Vessels written by Mthobisi Zondi and published by . This book was released on 2012 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Fatigue Environmental Factors and New Materials

Download or read book Fatigue Environmental Factors and New Materials written by Hardayal S. Mehta and published by . This book was released on 1998 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprises 40 papers from the July 1998 Conference. Topics include piping and vessel evaluations (mathematical modeling of weld and residual stresses, behavior of vessel cladding, and the treatment of extrusion pressures); fatigue in piping and pressure vessels (refinery RPG bullets, biaxial fatigue crack propagation, effect of machining procedures on fatigue behavior of PWR piping, fatigues of butt welded pipes, and notched stainless steel specimens); fatigue and environmental factors (effects of strain rate, oxygen, and temperature); and new and high temperature materials. Contains an author index but no subject index. Annotation copyrighted by Book News, Inc., Portland, OR

Book Residual Stresses at Weld Repairs in Pressure Vessels

Download or read book Residual Stresses at Weld Repairs in Pressure Vessels written by E. F. Rybicki and published by . This book was released on 1978 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Residual Stresses at Girth butt Welds in Pipes and Pressure Vessels

Download or read book Residual Stresses at Girth butt Welds in Pipes and Pressure Vessels written by and published by . This book was released on 1977 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Chemical Abstracts

Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2710 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Residual Stresses in Design Fabrication Assessment and Repair

Download or read book Residual Stresses in Design Fabrication Assessment and Repair written by Robert W. Warke and published by . This book was released on 1996 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Residual stresses introduced during fabrication (particularly by welding processes) are often a significant concern in the structural integrity of pressure vessels and piping; yet they are rarely treated explicitly in design, and unrealistically conservative assumptions regarding their distribution

Book Residual Stresses at Weld Repairs in Pressure Vessels

Download or read book Residual Stresses at Weld Repairs in Pressure Vessels written by E. F. Rybicki and published by . This book was released on 1978 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Investigation Into the Indian Point Water Spill and the NRC Nuclear Reactor Inspection Program

Download or read book Investigation Into the Indian Point Water Spill and the NRC Nuclear Reactor Inspection Program written by United States. Congress. House. Committee on Government Operations. Environment, Energy, and Natural Resources Subcommittee and published by . This book was released on 1981 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Weld Residual Stresses and Plastic Deformation

Download or read book Weld Residual Stresses and Plastic Deformation written by E. Rybicki and published by . This book was released on 1989-12-01 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Defects and Failures in Pressure Vessels and Piping

Download or read book Defects and Failures in Pressure Vessels and Piping written by Helmut Thielsch and published by Krieger Publishing Company. This book was released on 1975 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Weldments

Download or read book Weldments written by R. J. Christoffel and published by . This book was released on 1979 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Analysis of Welding induced Residual Stresses with the ADINA System

Download or read book Analysis of Welding induced Residual Stresses with the ADINA System written by and published by . This book was released on 1993 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Welding-induced residual stresses analysis procedure (WIRSAP), based on ADINA system of nonlinear finite element software, is described and results of several WIRSAP analyses are discussed. Several 2D axisymmetric WIRSAP analyses were performed for pipe girth welds and for several multi-pass girth-like welds attaching small nozzles to large, thick-walled pressure vessels. The analytical methodology follows closely Rybicki et al, enhanced by several specialized modeling techniques available in ADINA. The element birth option is used to simulate the addition of weld metal, and the mixed pressure/ displacement element formulation is used, in conjunction with temperature-dependent bi-linear plasticity material model. Some of the welds analyzed involve backing rings, which were subsequently 'machined off' via use of the element death option. The auto-time-stepping algorithm and matrix update iteration scheme are used in structural solutions. WIRSAP involves, a pass-by-pass analysis of uncoupled thermal and structural problems, but some analyses have been performed with an ''enveloping'' technique for grouping several weld passes together. The analyses are all 2D, but most are large problems and pose challenge to software and hardware. Operations are performed on a network of Silicon Graphics workstations, and ADINA and ADINA-T are executed on a 64 MW, eight-processor CRAY YIMP. Nominally 50 solution steps are utilized for each weld pass and weld joints involving as many as 31 individual weld passes analyzed on a pass-by-pass basis. Results from several WIRSAP analyses are discussed, and potential use of WIRSAP in a hypothetic attachment weld design optimization study is illustrated.