Experimental and Theoretical Analyses of the Load Sequence Effects on Fatigue Crack Growth Resistance

Abstract

Modeling of the fatigue crack propagation based on damage accumulation process ahead of the crack tip has been developed, which utilizes stress and strain distribution ahead of the crack tip, estimated using Rice and elastic solutions. The methodology is based on the use of both Kmax and DK as contributing parameters to the driving force and damage accumulation. Weight function approach has been adopted to determine the Kres profile. Load interaction and overload effects have been modeled by the effect of Kres on the Kmax and DK. The predictions of the present approach have been compared to experimental data and reasonable agreement has been found.

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Document Details

Document Type
Technical Report
Publication Date
Dec 14, 2004
Accession Number
ADA429107

Entities

People

  • Daniel Kujawski
  • Virender Goswami

Organizations

  • Western Michigan University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Agreements
  • Crack Propagation
  • Crack Tips
  • Cracks
  • Equations
  • Experimental Data
  • Fatigue Life
  • Fracture (Mechanics)
  • Geometry
  • Materials
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Overload
  • Residual Stress
  • Stress Intensity Factors
  • X-Ray Diffraction

Readers

  • Materials Science (Mechanical Engineering).
  • Structural Health Monitoring of Composite Structures.