Evaluation 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 objective of this research is 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 fatigue crack growth rate, da/dN toward 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 scanning device and crack opening displacement (COD) gauges in 10 Hz (testing frequency) by applying a load for 3.0-5.0 kN respectively. As a result, the correlation curve of Hp(y) was built with the R-Squared values in the range of 0.99 and one mathematical model has been 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) that present a good approach for magnetic parameter to be developed in the fatigue crack growth analysis. Therefore, the magnetic method has greater capability to analyze the fatigue crack propagation life in a real application.

Original languageEnglish
Pages (from-to)1727-1733
Number of pages7
JournalJournal of Mechanical Engineering and Sciences
Volume9
DOIs
Publication statusPublished - 1 Dec 2015

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

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

Cite this

Evaluation 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. 9, 01.12.2015, p. 1727-1733.

Research output: Contribution to journalArticle

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