Naval Postgraduate School
Dudley Knox Library
NPS Dudley Knox Library
View Item 
  •   Calhoun Home
  • Theses and Dissertations
  • 1. Thesis and Dissertation Collection, all items
  • View Item
  •   Calhoun Home
  • Theses and Dissertations
  • 1. Thesis and Dissertation Collection, all items
  • View Item
  • How to search in Calhoun
  • My Accounts
  • Ask a Librarian
JavaScript is disabled for your browser. Some features of this site may not work without it.

Browse

All of CalhounCollectionsThis Collection

My Account

LoginRegister

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

Probabilistic reliability modeling of fatigue on the H-46 tie bar

Thumbnail
Download
Icon94Sep_OConnor.pdf (2.453Mb)
Download Record
Download to EndNote/RefMan (RIS)
Download to BibTex
Author
O'Connor, John Charles
Date
1994-09
Advisor
Wu, Edward M.
Metadata
Show full item record
Abstract
The H-46 helicopter has experienced early in-service failures in its tie bar. The tie bar is a multi-component system that is a critical part of the linkage, which attaches the rotor blade to the rotating hub of the helicopter. This research developed methodology to predict the life of the tie bar under nominal operational flight loads. A probability model is indispensable because a revised design has yet to accumulate field data, and laboratory testing can never be sufficiently extensive for non-parametric reliability prediction. An algorithm was developed for three and four component systems that will generate the probability of system failure based on the probability of failure in its components. Finite element analysis was conducted on the tie bar to determine stress on each component for all possible damage configurations of the tie bar. A given set of flight loads was resolved into boundary conditions for the stress analysis. A methodology was developed to determine the probability of failure of each component using an idealized load history, based on the expected stress- life (S-N) relation of the component at the stress levels experienced by the component. The result is a prediction method that can fortify laboratory results to predict the probability of failure of a system given the system load history. This model will be verified using the early in-service failure statistics of the current design and can be used to assess revised designs. The model will provide a prediction of the failure distributions, (the bell-shaped distribution) as a fabrication of flight hours, or one, two, three, and four elements of failures within the leaves of the tie bar. (MM)
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
URI
https://hdl.handle.net/10945/30576
Collections
  • 1. Thesis and Dissertation Collection, all items

Related items

Showing items related by title, author, creator and subject.

  • Thumbnail

    Risk Modeling of Variable Probability External Initiating Events 

    Dempere, Jose; Papakonstantinou, Nikolaos; O'Halloran, Bryan; Van Bossuyt, Douglas L. (2017);
    As Components engineering has progressively advanced over the past 20 years to encompass a robust element of reliability, a paradigm shift has occurred in how complex systems fail. While failures used to be dominated ...
  • Thumbnail

    Probabilistic fatigue life predictions of structural components in high-cycle fatigue regimes 

    Lukens, Richard Walter (Monterey, California. Naval Postgraduate School, 1983-06);
    A principal mode of failure of structural components in mechanical systems is fatigue. One method of predicting the probability of fatigue failure of a structural component is to determine the probability that the calculated ...
  • Thumbnail

    Experimental investigation of failure in thin rings subjected to uniform external pressure 

    Demyttenaere, Jules Henry; Norris, William J. (Massachusetts Institute of Technology, 1954-05);
    The object of this thesis was to investigate experimentally the strain distributions and ultimate failures in thin circular and non-circular aluminum rings subjected to uniform external pressure. A test apparatus was ...
NPS Dudley Knox LibraryDUDLEY KNOX LIBRARY
Feedback

411 Dyer Rd. Bldg. 339
Monterey, CA 93943
circdesk@nps.edu
(831) 656-2947
DSN 756-2947

    Federal Depository Library      


Start Your Research

Research Guides
Academic Writing
Ask a Librarian
Copyright at NPS
Graduate Writing Center
How to Cite
Library Liaisons
Research Tools
Thesis Processing Office

Find & Download

Databases List
Articles, Books & More
NPS Theses
NPS Faculty Publications: Calhoun
Journal Titles
Course Reserves

Use the Library

My Accounts
Request Article or Book
Borrow, Renew, Return
Tech Help
Remote Access
Workshops & Tours

For Faculty & Researchers
For International Students
For Alumni

Print, Copy, Scan, Fax
Rooms & Study Spaces
Floor Map
Computers & Software
Adapters, Lockers & More

Collections

NPS Archive: Calhoun
Restricted Resources
Special Collections & Archives
Federal Depository
Homeland Security Digital Library

About

Hours
Library Staff
About Us
Special Exhibits
Policies
Our Affiliates
Visit Us

NPS-Licensed Resources—Terms & Conditions
Copyright Notice

Naval Postgraduate School

Naval Postgraduate School
1 University Circle, Monterey, CA 93943
Driving Directions | Campus Map

This is an official U.S. Navy Website |  Please read our Privacy Policy Notice  |  FOIA |  Section 508 |  No FEAR Act |  Whistleblower Protection |  Copyright and Accessibility |  Contact Webmaster

Export search results

The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

A logged-in user can export up to 15000 items. If you're not logged in, you can export no more than 500 items.

To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.