An Empirical Model for Load Ration and Test Temperature Effects on the Fatigue Crack Growth Rate of Aluminum Alloy 2024-T351

Abstract

Constant amplitude loading fatigue crack growth rate test data were generated for aluminum alloy 2024-T351 at 20 test conditions: the combination of five load ratios, 0.01, 0.1, 0.3, 0.5, and 0.6 and four test temperatures, 72 degrees, 200 degrees, 300 degrees, and 400 degress F (22 degrees, 93 degrees, 149 degrees, and 204 degrees C, respectively). A mathematical model of the shift in the linear data region with the variation in test temperature and/or load ratio was formulated. The model approximates the log-Paris coefficient as a linear relationship of both the R-ratio and test temperature assuming all other test parameters remain constant.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1982
Accession Number
ADA116567

Entities

People

  • Russell R. Cervay

Organizations

  • University of Dayton

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Communities of Interest

  • C4I

DTIC Thesaurus Topics

  • Aeronautical Laboratories
  • Air Force
  • Aluminum
  • Aluminum Alloys
  • Amplitude
  • Contracts
  • Data Sets
  • Fatigue Tests (Mechanics)
  • Frequency
  • Government Procurement
  • Governments
  • Heat Treatment
  • Materials
  • Materials Laboratories
  • Mathematical Models
  • Security
  • Universities

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  • Materials Science (Mechanical Engineering).
  • Regression Analysis.