Modeling of fatigue crack growth under constant and variable amplitude loading

Research output: Contribution to journalArticle

Abstract

In this paper, a modeling of fatigue crack growth of thin walled tube aluminum alloy with circumferential crack under constant and variable amplitude loading are presented. Three Fatigue crack growth models, namely Walker, Forman and NASGRO were examined. The results showed that the simulation of the fatigue crack growth under constant and variable amplitude loading in the proposed technique is an efficient tool and also the different models gave different fatigue crack growth behavior. There are many factors affecting the fatigue crack growth in structures. Crack initiation and stress ratio are studied and shown a great influence on the life of the thin walled tube. The NASGRO model was found to be the most appropriate model for the variable amplitude loading. Therefore, this model may be suggested for use in critical applications in studying fatigue crack growth for different structures under variable amplitude loading.

Original languageEnglish
Pages (from-to)131-135
Number of pages5
JournalInternational Journal of Mechanical and Materials Engineering
Volume4
Issue number2
Publication statusPublished - 2009

Fingerprint

Fatigue crack propagation
Crack initiation
Aluminum alloys
Cracks

Keywords

  • Constant and variable amplitude loading
  • Crack initiation
  • Fatigue crack growth
  • Modeling
  • Stress ratio and thin wall tube

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

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title = "Modeling of fatigue crack growth under constant and variable amplitude loading",
abstract = "In this paper, a modeling of fatigue crack growth of thin walled tube aluminum alloy with circumferential crack under constant and variable amplitude loading are presented. Three Fatigue crack growth models, namely Walker, Forman and NASGRO were examined. The results showed that the simulation of the fatigue crack growth under constant and variable amplitude loading in the proposed technique is an efficient tool and also the different models gave different fatigue crack growth behavior. There are many factors affecting the fatigue crack growth in structures. Crack initiation and stress ratio are studied and shown a great influence on the life of the thin walled tube. The NASGRO model was found to be the most appropriate model for the variable amplitude loading. Therefore, this model may be suggested for use in critical applications in studying fatigue crack growth for different structures under variable amplitude loading.",
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T1 - Modeling of fatigue crack growth under constant and variable amplitude loading

AU - Beden, S. M.

AU - Abdullah, Shahrum

AU - Mohd Ihsan, Ahmad Kamal Ariffin

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N2 - In this paper, a modeling of fatigue crack growth of thin walled tube aluminum alloy with circumferential crack under constant and variable amplitude loading are presented. Three Fatigue crack growth models, namely Walker, Forman and NASGRO were examined. The results showed that the simulation of the fatigue crack growth under constant and variable amplitude loading in the proposed technique is an efficient tool and also the different models gave different fatigue crack growth behavior. There are many factors affecting the fatigue crack growth in structures. Crack initiation and stress ratio are studied and shown a great influence on the life of the thin walled tube. The NASGRO model was found to be the most appropriate model for the variable amplitude loading. Therefore, this model may be suggested for use in critical applications in studying fatigue crack growth for different structures under variable amplitude loading.

AB - In this paper, a modeling of fatigue crack growth of thin walled tube aluminum alloy with circumferential crack under constant and variable amplitude loading are presented. Three Fatigue crack growth models, namely Walker, Forman and NASGRO were examined. The results showed that the simulation of the fatigue crack growth under constant and variable amplitude loading in the proposed technique is an efficient tool and also the different models gave different fatigue crack growth behavior. There are many factors affecting the fatigue crack growth in structures. Crack initiation and stress ratio are studied and shown a great influence on the life of the thin walled tube. The NASGRO model was found to be the most appropriate model for the variable amplitude loading. Therefore, this model may be suggested for use in critical applications in studying fatigue crack growth for different structures under variable amplitude loading.

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KW - Stress ratio and thin wall tube

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