The Fatigue Crack Growth under Variable Amplitude Loading in Built-up Structures.

Abstract

The object of this investigation is the development of a reliable procedure for evaluating the growth of a crack in a built-up structure under realistic loading conditions. To this end tests have been conducted on stiffened and unstiffened panels to monitor the growth of a crack both under constant and variable amplitude loads. The test data has been evaluated on the basis of a deep theoretical analysis which has allowed us to reach significant results on the following main topics: - influence of the fastener flexibility and stringer-sheet friction forces on fatigue crack propagation in stiffened panels, - reliability of existing methods for predicting the growth of a crack under loading conditions in plain sheets.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1979
Accession Number
ADA084936

Entities

People

  • A. Salvetti
  • G. Cavallini
  • L. Lazzeri

Organizations

  • University of Pisa

Tags

Communities of Interest

  • Air Platforms
  • C4I

DTIC Thesaurus Topics

  • Accuracy
  • Actuators
  • Aircrafts
  • Computational Science
  • Computer Programs
  • Crack Propagation
  • Data Analysis
  • Data Processing
  • Experimental Data
  • Information Science
  • Materials
  • Mechanics
  • Random Variables
  • Regression Analysis
  • Reliability
  • Statistical Analysis
  • Statistical Distributions

Fields of Study

  • Engineering

Readers

  • Structural Health Monitoring of Composite Structures.