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The Effect of Dwell Loading on the Small Fatigue Crack Growth at Notches in IN100

Ward, D'Anthony Allen
http://rave.ohiolink.edu/etdc/view?acc_num=dayton1355235018

Abstract Details

2012, Master of Science (M.S.), University of Dayton, Materials Engineering.
Dwell loaded components are common in the turbine engine section of gas turbine engines. The turbine components are subjected to high stresses and high loads for up to 2 min during a pilots take-off, cruise and landing. Understanding the mechanisms of crack initiation while the turbine components are subjected to dwell loading is essential for fatigue life predictions. Previously conducted research includes the fatigue testing and life prediction of dwell specimens with an evenly distributed stress that is representative of a smooth location on the turbine disk. However, turbine disks have notches and fillets that change the stress concentration. This thesis utilizes the techniques and testing strategies that have been successful in predicting fatigue life in smooth bar dwell specimens and applies them to dwell notched specimens that are more representative of actual fielded components. The notch fatigue study indicates that the minimum fatigue life prediction method is applicable for various geometries and therefore, its applicability to actual fielded components holds reasonable promise.
Charles Browning, PhD (Advisor)
Andrew Rosenberger, PhD (Committee Member)
James Snide, PhD (Committee Member)
115 p.
Engineering; Materials Science
Dwell; Transgranular; Intergranular; Fatigue; Small Crack Growth; Fractography

Recommended Citations

Citations

  • Ward, D. A. (2012). The Effect of Dwell Loading on the Small Fatigue Crack Growth at Notches in IN100 [Master's thesis, University of Dayton]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1355235018

    APA Style (7th edition)

  • Ward, D'Anthony. The Effect of Dwell Loading on the Small Fatigue Crack Growth at Notches in IN100. 2012. University of Dayton, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=dayton1355235018.

    MLA Style (8th edition)

  • Ward, D'Anthony. "The Effect of Dwell Loading on the Small Fatigue Crack Growth at Notches in IN100." Master's thesis, University of Dayton, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1355235018

    Chicago Manual of Style (17th edition)

dayton1355235018
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© 2012, all rights reserved.
This open access ETD is published by University of Dayton and OhioLINK.