Acoustic Emission Study Of Fatigue Crack Growth In Rail Track Material

Mohd Yusof, Taib (2010) Acoustic Emission Study Of Fatigue Crack Growth In Rail Track Material. In: National Conference in Mechanical Engineering Research and Postgraduate Studies (2nd NCMER 2010) , 3-4 December 2010 , UMP Pekan, Pahang. .

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Abstract

The fatigue crack growth behavior of longitudinal crack in rail steel was investigated using the compact tension, (CT) specimen. The fatigue crack growth rate curve, da/dN as a function of stress intensity factor range, ∆ K was plotted in order to analyze the crack growth properties of rail material. The CT specimen was tested by means of tension-tension stresses with load ratio of 0.1 while simultaneously recording the acoustic emission, (AE) signal. The acoustic emission count rate associated with the stress intensity factor was obtained to understand acoustic emission behavior corresponding to the fatigue crack growth. The result indicates that the constant values of C and m according to Paris Law equation, da/dN = C(∆ K) m are 2.63x10-12 and 3.29, respectively. The acoustic emission count rate equation becomes dn/dN = 2.63x10- 7(∆ K) 3.51. The linear relationship between crack growth rate and AE count rate will give log(da/dN) = 0.738log(dn/dN) - 5.815. Based on these correlations it may possible to monitoring fatigue damage of short term acoustic emission monitoring

Item Type:	Conference or Workshop Item (Paper)
Additional Information:	Proceeding ISBN: 978-967-0120-04-1
Uncontrolled Keywords:	Acoustic emission (AE), AE count, Fatigue, Crack growth, Rail track
Subjects:	T Technology > TJ Mechanical engineering and machinery
Faculty/Division:	Faculty of Mechanical Engineering
Depositing User:	Pn. Hazlinda Abd Rahman
Date Deposited:	25 Aug 2011 07:09
Last Modified:	09 Apr 2018 01:40
URI:	http://umpir.ump.edu.my/id/eprint/1768
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