Fatigue Strength of Electrogas Welds in Double-hull Con-struction PDF Download
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Author: Mark R. Kaczinski
Publisher:
ISBN:
Category : Tankers
Languages : en
Pages : 41
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Author: Mark R. Kaczinski
Publisher:
ISBN:
Category : Tankers
Languages : en
Pages : 41
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Book Description
Author: Eric James Kaufmann
Publisher:
ISBN:
Category : Fracture mechanics
Languages : en
Pages : 54
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Abstract: "A new tanker design currently under development incorporates new design and fabrication features which are expected to reduce shipbuilding costs by as much as 30 percent and provide for environmentally safe transport of oil products. This new double-hull design incorporates 2.1 m x 2.4 m x 15.2 m (7'x8'x50') cellular modules joined into 172-268 metric ton (190-295 ton) hull sub-assemblies. The sub- assemblies can be incorporated into new or existing single-hulled ships. As currently planned, the two hull plates and cell web girder of each module will be joined with a single, continuous weld pass in a vertical orientation using the Electrogas welding (EGW) process. The EGW process was selected because of the high deposition rates which can be achieved (23 kg/hr) and corresponding high productivity. Because of uncertainties associated with the weld process stemming from experiences with the related electroslag welding (ESW) process regarding fatigue and low fracture toughness, studies were undertaken to evaluate the fatigue and fracture behavior of this weld detail. The results of the fatigue study were reported previously. The current study is a follow-on which examines the fracture toughness of the electrogas weld metal. Elastic-plastic fracture toughness (J[subscript IC]) and Charpy V-notch (CVN) impact toughness tests were performed on a test plate fabricated using the same materials and weld procedures as used in full-size fabrications. Compact tension (CT) and Charpy V-notch test specimens were fabricated from the weld metal in the L-T and T-L orientation. Additional test specimens were located in the heat-affected-zone (HAZ) and base plate (ABS Grade CS). A total of 12 compact tension specimens and 72 CVN specimens were tested. Test results from both compact tension and CVN tests indicate that the fracture toughness of the base metal, weld metal and HAZ were similar. The CVN tests indicated a 20 J (15 ft-lb) transition temperature of at least -40 C. The J[subscript IC] tests performed in accordance with ASTM E 813 resulted in J[subscript IC] values in the weld metal and HAZ ranging from 106-146 kJ/m2 (608-834 in-lb/in2) which correlate to K[subscript c] values of 148- 174 MPa(m)[superscript 1/2] (135-158 ksi(in)[superscript 1/2]). No significant orientation effect was observed in the weld metal. Based upon the types and sizes of fabrication flaws observed in the previous fatigue study, an assessment of their fracture sensitivity was performed in light of the measured fracture toughness. It was concluded that none of the observed fabrication flaws were critical from a fracture viewpoint and that critical flaw sizes were through-thickness and large enough to be detected by visual inspection."
Author: Timothy Russell Gurney
Publisher: CUP Archive
ISBN: 9780521225588
Category : Technology & Engineering
Languages : en
Pages : 480
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Author:
Publisher:
ISBN:
Category :
Languages : de
Pages : 192
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Author: Masoud Sanayei
Publisher:
ISBN:
Category : Structural engineering
Languages : en
Pages : 776
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Book Description
Author: George J. Bruce
Publisher: Butterworth-Heinemann
ISBN: 0080972403
Category : Technology & Engineering
Languages : en
Pages : 401
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Book Description
Ship Construction, Seventh Edition, offers guidance for ship design and shipbuilding from start to finish. It provides an overview of current shipyard techniques, safety in shipyard practice, materials and strengths, welding and cutting, and ship structure, along with computer-aided design and manufacture, international regulations for ship types, new materials, and fabrication technologies. Comprised of seven sections divided into 32 chapters, the book introduces the reader to shipbuilding, including the basic design of a ship, ship dimensions and category, and development of ship types. It then turns to a discussion of rules and regulations governing ship strength and structural integrity, testing of materials used in ship construction, and welding practices and weld testing. Developments in the layout of a shipyard are also considered, along with development of the initial structural and arrangement design into information usable by production; the processes involved in the preparation and machining of a plate or section; and how a ship structure is assembled. A number of websites containing further information, drawings, and photographs, as well as regulations that apply to ships and their construction, are listed at the end of most chapters. This text is an invaluable resource for students of marine sciences and technology, practicing marine engineers and naval architects, and professionals from other disciplines ranging from law to insurance, accounting, and logistics. - Covers the complete ship construction process including the development of ship types, materials and strengths, welding and cutting and ship structure, with numerous clear line diagrams included for ease of understanding - Includes the latest developments in technology and shipyard methods, including a new chapter on computer-aided design and manufacture - Essential for students and professionals, particularly those working in shipyards, supervising ship construction, conversion and maintenance
Author: Society of Naval Architects and Marine Engineers (U.S.)
Publisher:
ISBN:
Category : Marine engineering
Languages : en
Pages : 622
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Book Description
List of members in vols. 1-24, 38-54, 57.
Author: Shin Mitsubishi Jūkōgyō Kabushiki Kaisha
Publisher:
ISBN:
Category : Industrial engineering
Languages : en
Pages : 344
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Book Description
Author: Yasuhisa Okumoto
Publisher: Springer Science & Business Media
ISBN: 3540884459
Category : Technology & Engineering
Languages : en
Pages : 571
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Book Description
In this book, the four authors show us the condensed experience how to design ship hull structures from a practical viewpoint. In three parts, the book presents the fundamentals, the theory and the application of structural design of hulls. The topics are treated comprehensively with an emphasis on how to achieve reliable and efficient ship structures. The authors have in particular introduced their experiences with the rapid increase of ship sizes as well as the introduction of ship types with a high degree of specialization. The associated early failures of these "new" structures have been analyzed to provide the readers with illustrations why structural design needs to be carried out on several levels in order to ensure that correct loading is applied and that local structural behaviour in properly understood.
Author:
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 782
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Book Description
