Fatigue Strength of Lugs Containing Liners. Volume 1. Results

Abstract

This report presents the results of an investigation of the fatigue strength of structural lugs. The program included both experimental and analytical phases which were used in a complementary fashion to formulate design charts for fatigue-loaded steel and titanium lugs containing interference-fit liners. These lugs are representative of design practice in highly loaded aircraft applications, particularly that found in helicopter blade attaching systems. A primary element in the analytical study was a two-dimensional structural analysis of lug configurations, which was done by finite element methods using a computer program. This computer program is published in Volume II of this report. The design charts presented will permit the designer to rapidly select lug proportions in either steel or titanium that will satisfy structural requirements for a range of steady and vibratory loading. The designs are considered to be particularly applicable to helicopter rotor and control systems.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1970
Accession Number
AD0880289

Entities

People

  • Paul F. Maloney
  • Robert J. Mayerjak

Organizations

  • Kaman Corporation

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms
  • Human Systems
  • Space

DTIC Thesaurus Topics

  • Aircrafts
  • Boundaries
  • Computer Programs
  • Elastic Properties
  • Engineering
  • Equations
  • Failure Mode And Effect Analysis
  • Finite Element Analysis
  • Helicopter Rotors
  • Materials
  • Mechanical Working
  • Mechanics
  • Modulus Of Elasticity
  • Relative Motion
  • Resonant Frequency
  • Shot Peening
  • Tensile Strength

Fields of Study

  • Physics

Readers

  • Aerospace Engineering
  • Computer Science.
  • Structural Health Monitoring of Composite Structures.