Characterisation of Stress Intensity Factor with Magnetic Flux Signal Leakage in Stable Fatigue Crack Growth Region S. R. Ahmad ...[et al.]

Ahmad, S. R. and Arifin, A. and Abdullah, S. and M. Yunoh, M. F. (2018) Characterisation of Stress Intensity Factor with Magnetic Flux Signal Leakage in Stable Fatigue Crack Growth Region S. R. Ahmad ...[et al.]. Journal of Mechanical Engineering (JMechE), SI 5 (3). pp. 141-155. ISSN 18235514

Abstract

This paper presents the characterisation of the stress intensity factor range ΔK, with the magnetic flux gradient, dH(y)/dx signals obtained using the metal magnetic memory (MMM) method during fatigue crack growth test. The MMM method is a passive non-destructive testing technique developed for the examination of self-magnetic leakage field signals which were generated in the stress concentration zones. In this paper, the fatigue crack growth test was conducted by applying a constant amplitude loading at different stress ratios. The scanning device and crack opening displacement gauges were used for acquiring the magnetic signals and crack growth parameter, respectively. The relationship between the dH(y)/dx signals, fatigue crack growth rate, da/dN and ΔK was determined. As a result, some similarities were observed between the ΔK and dH(y)/dx signals; wherein both were seen to increase with an increase in the value of da/dN. Furthermore, the analysis of the relationship between dH(y)/dx and ΔK focused on the stable crack growth region and noted that the correlation of determination ranged between 0.9286 - 0.9788. This indicates that dH(y)/dx signals can be used to evaluate the fatigue crack growth of the material.

Metadata

Item Type: Article
Creators:
CreatorsEmail / ID. Num
Ahmad, S. R.UNSPECIFIED
Arifin, A.azli@ukm.edu.my
Abdullah, S.UNSPECIFIED
M. Yunoh, M. F.UNSPECIFIED
Subjects: T Technology > TA Engineering. Civil engineering > Engineering machinery, tools, and implements
T Technology > TJ Mechanical engineering and machinery
T Technology > TJ Mechanical engineering and machinery > Machine shops and machine shop practice > Machine tools and machining
Divisions: Universiti Teknologi MARA, Shah Alam > Faculty of Mechanical Engineering
Journal or Publication Title: Journal of Mechanical Engineering (JMechE)
Journal: UiTM Journal > Journal of Mechanical Engineering (JMechE)
ISSN: 18235514
Volume: SI 5
Number: 3
Page Range: pp. 141-155
Item ID: 39429
Uncontrolled Keywords: Crack, fatigue, magnetic flux, steel, stress intensity factor
URI: http://ir.uitm.edu.my/id/eprint/39429

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