Fatigue Life Program Using Strain-Life Methods

Abstract

A user friendly program was developed to calculate fatigue life using Strain-Life equations, given either a stress history or a strain history. Additionally, the material parameters and associated stress concentration factors can be varied. Since certain material constants, such as cyclic strength coefficient (K') and cyclic strain hardening exponent (n') vary during a material's fatigue life, the program is capable of either keeping them constant or varying them as a function of elapsed cycles. The program was then utilized to examine the effects of varying K' and n' on the calculated fatigue life of aluminum 7075-T6 under a typical flight load history.

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Document Details

Document Type
Technical Report
Publication Date
Mar 25, 1993
Accession Number
ADA267310

Entities

People

  • Michael V. Skelly

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Computations
  • Computer Programming
  • Computer Programs
  • Data Reduction
  • Databases
  • Elastic Properties
  • Engineering
  • Far Field
  • Fatigue Life
  • Modulus Of Elasticity
  • Numbers
  • Strain Hardening
  • Stress Concentration
  • Tensile Strength
  • United States
  • User Friendly

Readers

  • Materials Science (Mechanical Engineering).
  • Naval Engineering and Maritime Security