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J-integral evaluation of surface cracks in round bar under Mode III loadings

Ismail, Al Emran and Ariffin, A. K. and Abdullah, S. and Ghazali, M. J. (2014) J-integral evaluation of surface cracks in round bar under Mode III loadings. Research Journal of Applied Sciences, Engineering and Technology, 7 (10). pp. 1985-1993. ISSN 2040-7467

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Fracture mechanics approach has successfully used to characterize the existing cracks in engineering materials and structures. Tremendous number of publications on surface cracks can be found for crack behaviour which was assumed to behave linear elastic. However, lack of information on elastic-plastic crack behaviour or J-integral was demanded especially for 3D surface cracks. In this present study, semi-elliptical surface cracks embedded in a solid round bar subjected to mode III loadings are considered. Then, J-integral or h-function and limit load were determined and analyzed. In order to predict J-integral along the crack front, a mathematical model was then developed. It is found that the developed model capable to predict J-integral well. However, the predictions breakdown occurred when the elastic dominated region of cracks.

Item Type: Article
Uncontrolled Keywords: ANSYS; J-integral; mode III loadings; round bar; surface crack
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA349-359 Mechanics of engineering. Applied mechanics
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Engineering Mechanics
Depositing User: Normajihan Abd. Rahman
Date Deposited: 25 Jan 2015 08:39
Last Modified: 25 Jan 2015 08:39
URI: http://eprints.uthm.edu.my/id/eprint/6254
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