Study of the Effects of Metallurgical Factors on the Growth of Fatigue Microcracks.

Abstract

Crystallographic and microstructural factors involved in the growth of small fatigue cracks have been characterized for Al alloys. Special techniques have been used to study and quantify the behavior of local crack tip yielding and incremental crack advance. Results have been incorporated into a physically-based, deterministic crack growth model which successfully predicts microcrack growth rates. Keywords: Small cracks, Microcracks, Fatigue, Crack tip strain, Crack tip opening, Crack opening load, Crystallographic effects, Crack growth models.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 25, 1987
Accession Number
ADA188475

Entities

People

  • James Lankford

Organizations

  • Southwest Research Institute

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Classification
  • Crack Tips
  • Displacement
  • Engineering
  • Fracture (Mechanics)
  • Integrals
  • Materials
  • Materials Science
  • Mechanics
  • Micromechanics
  • Plastic Flow
  • Scientists
  • Security
  • Stress Intensity Factors

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).