ON FATIGUE FAILURE OF A MULTIPLE-LOAD-PATH REDUNDANT STRUCTURE.

Abstract

It is difficult to evaluate the survivorship or reliability function of a structure subject to fatigue consisting of a number of members from the survivorship functions of a single specimen that can be obtained from experiment. AN ATTEMPT IS THEREFORE MADE TO ESTABLISH THE UPPER AND LOWER BOUNDS OF SUCH A SURVIVORSHIP FUNCTION UNDER THE ASSUMPTION OF CONSTANT AMPLITUDE FATIGUE AND EQUAL DISTRIBUTION OF THE LOAD AMONG THE EXISTING MEMBERS, APPROXIMATING THE REAL PROCESS OF THE FAILURE BY MARKOVIAN PROCESSES. A numerical example employing the data of fatigue tests performed on 7075 Aluminum alloy single specimens indicates that the order of magnitude of the life of a composite structure can be reasonably well predicted by the estimate of the bounds according to the present method. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1965
Accession Number
AD0467857

Entities

People

  • A. M. Freudenthal
  • M. Shinozuka

Organizations

  • Columbia University

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Amplitude
  • Composite Materials
  • Composite Structures
  • Fatigue Tests (Mechanics)
  • Materials
  • Materials Testing
  • Reliability

Readers

  • Statistical inference.
  • Structural Health Monitoring of Composite Structures.