Fatigue life assessment for metallic structure

A case study of shell structure under variable amplitude loading

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This study presents an analysis techinque to asses the fatigue life of a shell structure under variable amplitude loadings (VAL). For this purpose, the finite element analysis technique was used for the simulation works. The life prediction results are useful for improving the component design methodology at the early develop stage especially for shell structures such as a pressure vessels or pipelines analysis. The fatigue life prediction was performed using the finite element based fatigue analysis codes. In addition the ability of stress-life (S-N) and strain-life (ε-N) approaches to correlate and predict life are examined according to the different damage and failure rules. Numerical life prediction results (S-N and ε-N) of shells under VAL, as well as Constant Amplitude Loading (CAL) are presented and discussed. The effect of the mean stress, surface finish and the shell thickness are studied and discussed as apart of the interactions between geometries, loadings and materials. The simulation results showed that more studies on the shell structure need to be performed in order to obtain more accurate fatigue life.

Original languageEnglish
Pages (from-to)1622-1631
Number of pages10
JournalJournal of Applied Sciences
Volume8
Issue number9
DOIs
Publication statusPublished - 2008

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Fatigue of materials
Pressure vessels
Pipelines
Finite element method
Geometry

Keywords

  • Fatigue
  • Finite element analysis
  • Life prediction
  • Shell
  • Variable amplitude loading

ASJC Scopus subject areas

  • General

Cite this

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title = "Fatigue life assessment for metallic structure: A case study of shell structure under variable amplitude loading",
abstract = "This study presents an analysis techinque to asses the fatigue life of a shell structure under variable amplitude loadings (VAL). For this purpose, the finite element analysis technique was used for the simulation works. The life prediction results are useful for improving the component design methodology at the early develop stage especially for shell structures such as a pressure vessels or pipelines analysis. The fatigue life prediction was performed using the finite element based fatigue analysis codes. In addition the ability of stress-life (S-N) and strain-life (ε-N) approaches to correlate and predict life are examined according to the different damage and failure rules. Numerical life prediction results (S-N and ε-N) of shells under VAL, as well as Constant Amplitude Loading (CAL) are presented and discussed. The effect of the mean stress, surface finish and the shell thickness are studied and discussed as apart of the interactions between geometries, loadings and materials. The simulation results showed that more studies on the shell structure need to be performed in order to obtain more accurate fatigue life.",
keywords = "Fatigue, Finite element analysis, Life prediction, Shell, Variable amplitude loading",
author = "Shahrum Abdullah and Beden, {S. M.} and {Mohd Ihsan}, {Ahmad Kamal Ariffin} and Rahman, {M. M.}",
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AU - Beden, S. M.

AU - Mohd Ihsan, Ahmad Kamal Ariffin

AU - Rahman, M. M.

PY - 2008

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N2 - This study presents an analysis techinque to asses the fatigue life of a shell structure under variable amplitude loadings (VAL). For this purpose, the finite element analysis technique was used for the simulation works. The life prediction results are useful for improving the component design methodology at the early develop stage especially for shell structures such as a pressure vessels or pipelines analysis. The fatigue life prediction was performed using the finite element based fatigue analysis codes. In addition the ability of stress-life (S-N) and strain-life (ε-N) approaches to correlate and predict life are examined according to the different damage and failure rules. Numerical life prediction results (S-N and ε-N) of shells under VAL, as well as Constant Amplitude Loading (CAL) are presented and discussed. The effect of the mean stress, surface finish and the shell thickness are studied and discussed as apart of the interactions between geometries, loadings and materials. The simulation results showed that more studies on the shell structure need to be performed in order to obtain more accurate fatigue life.

AB - This study presents an analysis techinque to asses the fatigue life of a shell structure under variable amplitude loadings (VAL). For this purpose, the finite element analysis technique was used for the simulation works. The life prediction results are useful for improving the component design methodology at the early develop stage especially for shell structures such as a pressure vessels or pipelines analysis. The fatigue life prediction was performed using the finite element based fatigue analysis codes. In addition the ability of stress-life (S-N) and strain-life (ε-N) approaches to correlate and predict life are examined according to the different damage and failure rules. Numerical life prediction results (S-N and ε-N) of shells under VAL, as well as Constant Amplitude Loading (CAL) are presented and discussed. The effect of the mean stress, surface finish and the shell thickness are studied and discussed as apart of the interactions between geometries, loadings and materials. The simulation results showed that more studies on the shell structure need to be performed in order to obtain more accurate fatigue life.

KW - Fatigue

KW - Finite element analysis

KW - Life prediction

KW - Shell

KW - Variable amplitude loading

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