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Experimental Mechanics

, Volume 38, Issue 3, pp 161–166 | Cite as

Fatigue crack initaition and propagation from hole defects

  • S. -H. Song
  • J. -S. Bae
Article

Abstract

The aim of this study is to investigate the interaction of two hole defects affecting fatigue crack initiation life and propagation behavior. The location of two hole defects was characterized by an angle of alignment and the distance between the centers of two hole defects. The fatigue cracking behavior is studies under bending for AI 5086. When defects are located close to each other, the fatigue crack initiation lives are varied with their relative locations. In the experiments, the area of the local plastic stratin strongly played a role in the fatigue crack initiation lives. Therefore, the authors introduce a parameter which contains the plastic deformation are at stress concentrations and proposed a fatigue crack initiation life prediction curve. In addition, the directions and propagation rates of fatigue cracks initiated at two hole defects were studied experimentally.

Keywords

Fatigue Mechanical Engineer Plastic Deformation Fluid Dynamics Fatigue Crack 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Society for Experimental Mechanics, Inc. 1998

Authors and Affiliations

  • S. -H. Song
    • 1
  • J. -S. Bae
    • 1
  1. 1.Department of Mechanical EngineeringKorea UniversitySeouelKorea

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