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Wednesday, July 15, 2020 | History

4 edition of Evaluation of fatigue tests and design criteria on welded details found in the catalog.

Evaluation of fatigue tests and design criteria on welded details

P. B. Keating

Evaluation of fatigue tests and design criteria on welded details

by P. B. Keating

  • 291 Want to read
  • 32 Currently reading

Published by Transportation Research Board, National Research Council in Washington, D.C .
Written in English

    Subjects:
  • Bridges -- Welded joints,
  • Bridges, Iron and steel,
  • Welded joints -- Fatigue

  • Edition Notes

    StatementP.B. Keating and J.W. Fisher.
    SeriesNational Cooperative Highway Research Program report,, 286, Report (National Cooperative Highway Research Program) ;, 286.
    ContributionsFisher, John W., 1931-, American Association of State Highway and Transportation Officials., United States. Federal Highway Administration.
    Classifications
    LC ClassificationsTE7 .N25 no. 286, TG153 .N25 no. 286
    The Physical Object
    Pagination66 p. :
    Number of Pages66
    ID Numbers
    Open LibraryOL2742442M
    ISBN 100309040205
    LC Control Number86051033

    Fatigue failures in piping systems occur, almost without exception, at the welded connections. In nuclear power plant systems, such failures occur predominantly at the socket welds of small diameter piping ad fillet attachment welds under high-cycle vibratory conditions. Tension, shear, bend, toughness, fatigue, creep, stress rupture, and cracking tests are widely used for fusion-welded, spot-welded, and brazed joints. Descriptions of many of these tests with drawings of specimens used for the tests are included to provide a needed reference for selecting or designing suitable test specimens for the weldment.

    fatigue life of welded joints and the fatigue strength improvement effects of UIT, and the prediction results agreed well with those obtained with actual fatigue tests. The system is expected to find wide application in the fields of fatigue design and maintenance and bending stressforAuthor: Tabassum Karajagi, Nitin Ambhore. Inspection procedure (NDT, non destructive Test), if specified; Post weld treatment, if specified. The S-N curves together with detail classes of basic joints used by the nominal stress method which can be found in several standards and design guidelines and are mainly based on the statistical evaluation of relevant fatigue tests carriedFile Size: 2MB.

    This chapter presents FLS design principles and criteria together with selected engineering practices applicable for the structure of ship-shaped offshore units. Under the action of repeated loading, fatigue cracks may in time be initiated in the stress concentration areas of ship-shaped offshore structures, and indeed have been reported by. TRAINING COURSE SERIES No. 13 Guidebook for the Fabrication of Non-Destructive Testing (NDT) Test Specimens INTERNATIONAL ATOMIC ENERGY AGENCY,


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Evaluation of fatigue tests and design criteria on welded details by P. B. Keating Download PDF EPUB FB2

Studies on full-scale, welded steel test specimens, the original database was broadened to include a wider range of detail types and sizes. Each data group was compared to the existing AASHTO fatigue design provisions in order to determine the adequacy of the resistance curves and to check for.

Evaluation of Fatigue Tests and Design Criteria on Welded Details (National Cooperative Highway Research Program Report) [Keating, Pauline B., Fisher, J. W.] on *FREE* shipping on qualifying offers. Evaluation of Fatigue Tests and Design Criteria on Welded Details (National Cooperative Highway Research Program Report)Authors: J.

Fisher, Pauline B. Keating. EVALUATION OF FATIGUE TESTS AND DESIGN CRITERIA ON WELDED DETAILS. SUMMARY Since the fatigue resistance provisions of the AASHTO Specifications were devel- oped from test data documented in NCHRP Reports and several major fatigue studies have been conducted.

evaluation of fatigue tests and design criteria on welded details A study is reported which attempted to compile and review all available fatigue data. It reevaluated the existing fatigue specificatios so that they more accurately reflected the current state of knowledge.

welded details are resulting in a limited number of possible treatable design cases. The fatigue of welded structures is a somewhat complex and progressive form of local damage which can be evaluated more accurately using local failure approaches, such as.

The comparison of the fatigue strength from existing design codes and fatigue test data was performed, and the results showed that the fatigue strength of welded joints of stainless steel was.

One of the best resources for pairing joint details with the proper fatigue category is AWS D, Table “Fatigue Stress Design Parameters,” which contains seven sections with about Fatigue is a major cause of failure, particularly in welded structures, reflecting the inherently poor fatigue performance of many welded joints (Fig.1).This emphasises the need for due consideration of potential fatigue failure at the design stage, and for clear design guidance.

Field measurements have been carried out under normal traffic loading during an 8-day period of time. Laboratory tests are made on samples taken from the most critical fatigue details on a region of high stress fluctuation (mid span) and the same details at Cited by: 6.

Details that provide the lowest allowable stress range in vo}o.;e connections that experience fatigue crack growth from weld toes and weld ends where there is a high stress concen­ tration.

This is true of both fillet and groove welded details. Dctails which serve the intended function and provide the. Evaluation of fatigue tests and design criteria on welded details. Washington, D.C.: Transportation Research Board, National Research Council, [] (OCoLC) FATIGUE DESIGN CRITERIA (CONT’D) Residual strength is the strength at any instant in the presence of a crack.

 With no cracks, this could be the ultimate tensile strength or yield strength depending upon failure criteria File Size: KB. Review of Fatigue Assessment Methods for Welded Steel Structures. in welded details that are prone to fatigue, cracks will always Based on the review of fatigue assessment methods of welded.

NCHRP Report Evaluation of Fatigue Tests and Design Criteria on Welded Details by P. Keating and J. Fisher () mentions that the initial AASHTO Fatigue Design Curves were derived from the linear regression analysis of the test data obtained in NCHRP Project (NCHRP Reports and ) using the 95% confidence limits defining the lower bounds of the fatigue resistance for.

2) review of multiaxial fatigue criteria for welded joints, 3) review of fatigue test data available in the open liter-ature, and 4) evaluation of the multiaxial fatigue criteria against the experimental data.

Multiaxial fatigue criteria The assessment criteria for multiaxial fatigue loading can be based on three concepts; equivalent. These tests consisted of various welded joint details subjected to cyclic stresses on a test fixture until fatigue failure was imminent.

The main goals of this program were. In the case of a fatigue crack was propagated in one of two tested area, a stop hole was drilled and a high tension bolt was tightened to continue fatigue tests.

Eddy Current Test (ET) and Magnetic Particle Test (MT) were applied to detect fatigue cracks at weld toe along cross beam bottom flange edges. Due to high stress concentrations, welded joints represent the most common locations of fatigue crack initiation in steel structures that are prone to fatigue.

Welding affects material properties by the process of heating, cooling, and combining basic and additional material. Since welding is the primary process of joining elements in steel structures, it is obvious that fatigue assessment Author: Boris Fuštar, Ivan Lukačević, Darko Dujmović.

Design for appropriate stiffness or flexibility in welded beams and other structural members; Design for torsional resistance; Effects of thermal strains induced by welding in the presence of restraints; Effects of stress induced by welding in combina- tion with design stresses; Fatigue design and analysis of steel and composite bridges is generally based on the notion of the nominal stress using the classified S-N curves with corresponding fatigue classes for typical details.

Fatigue Performance of High-Frequency Welded Steel I-Beams. CONCLUSIONS. This research was performed to develop preliminary fatigue design recommendations for the use of HF-welded steel I-beams in bridge design. The HF welds were used in joining the web and flanges of the I-beam. Keating P, Fisher J () Evaluation of fatigue tests and design criteria on welded details.

Transportation Research Board, NCHRP, Washington, D.C. Google ScholarCited by: 4.Minor revisions to the fatigue design provisions were recommended to, and adopted by, the AASHTO Subcommittee on Bridges and Structures.

The evaluation and recommended specifications were published in: NCHRP Report"Evaluation of Fatigue Test Data and Design Criteria on Welded Details.".