Stress intensity factors for surface cracks in round bar under single and combined loadings

Ismail, Al Emran and Ariffin, A. K. and Abdullah, S. (2012) Stress intensity factors for surface cracks in round bar under single and combined loadings. Meccanica, 47 (5). pp. 1141-1156. ISSN 0025-6455


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This paper numerically discusses stress intensity factor (SIE) calculations for surface cracks in round bars subjected to single and combined loadings. Different crack aspect ratios, a/b, ranging from 0.0 to 1.2 and the relative crack depth, ajD, in the range of 0.1 to 0.6 are considered. Since the torsion loading is non-symmetrical, the whole finite element model has been constructed, and the loadings have been remotely applied to the model. The equivalent SIE F& is then used to cnmbiue the individual SIF from the bending or tension with torsion loadings. Then, it is compared with the combined SIF, FgE obtained numerically using the finite element analysis under similar loadings. It is found that the equivalent SIF method successfully predicts the combined S E FiQ for Mode I when compared with F;E. However, some discrepancies between the results, determined from the two different approaches, occur when FIII is involved. Meanwhile, it is also noted that the F$E is higher than the F*EQ due to the difference in crack face interactions and deformations.

Item Type:Article
Uncontrolled Keywords:combined stress intensity factors; finite element analysis; surface crack; crack face interactions
Subjects:T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Divisions:Faculty of Mechanical and Manufacturing Engineering > Department of Engineering Mechanics
ID Code:3866
Deposited By:Normajihan Abd. Rahman
Deposited On:25 Jul 2013 12:09
Last Modified:22 Jan 2015 08:14

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