Evaluating effect of magnetic flux leakage signals on fatigue crack growth of mild steel

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In engineering applications, analysis of crack growth life is useful in situations where an unexpected crack has been found in a component of a machine, vehicle, or structure. The objectives of this research are to investigate the correlation curve of magnetic flux leakage, Hp(y) signals by evaluating their critical value point with respect to step size. Moreover, the relation of the fatigue crack growth rate, da/dN with the stress intensity range, ΔK and Hp(y) in metal components is also discussed in this paper. The tension-Tension fatigue test was conducted with the metal magnetic memory (MMM) scanning device and crack opening displacement (COD) gauges at 10 Hz (testing frequency) by applying a load of 3.0-5.0 kN. As a result, the correlation curve of Hp(y) was built with the R-squared values in the range of 0.99 and a mathematical model was developed for estimation analysis. The sigmoidal shape curve was plotted on the graph of da/dN versus ΔK and also with Hp(y). Thus, for validation, the linear relation is represented between ΔK and Hp(y) and presents a good approach for magnetic parameters to be developed for fatigue crack growth analysis. Therefore, the magnetic method has a greater capability to analyse the fatigue crack propagation life in a real application.

Original languageEnglish
Pages (from-to)1827-1834
Number of pages8
JournalJournal of Mechanical Engineering and Sciences
Volume10
Issue number1
DOIs
Publication statusPublished - 1 Jun 2016

Fingerprint

Magnetic flux
Fatigue crack propagation
Carbon steel
Cracks
Metals
Gages
Crack propagation
Fatigue of materials
Mathematical models
Scanning
Data storage equipment
Testing

Keywords

  • Crack growth life
  • Fatigue test
  • Magnetic signals
  • Stress intensity range

ASJC Scopus subject areas

  • Computational Mechanics
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this

Evaluating effect of magnetic flux leakage signals on fatigue crack growth of mild steel. / Ahmad, M. I M; Arifin, Azli; Abdullah, Shahrum.

In: Journal of Mechanical Engineering and Sciences, Vol. 10, No. 1, 01.06.2016, p. 1827-1834.

Research output: Contribution to journalArticle

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