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

Ismail, Al Emran and Arifﬁn, A.K. and Abdullah, S. and Ghazali, M.J. (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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Official URL: http://dx.doi.org/10.1007/s11012-011-9500-7

Abstract

This paper numerically discusses stress in-tensity factor (SIF) 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, a/D, 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 SIF, F∗EQ is then used to combine the individual SIF from the bending or tension with torsion loadings. Then, it is compared with the combined SIF, F∗FE obtained numerically using the ﬁnite element analysis under similar loadings. It is found that the equivalent SIF method successfully predicts the combined SIF, F∗EQ for Mode I when compared with F∗FE . 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∗FE is higher than the F∗EQ due to the difference in crack face interactions and de-formations.

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 Mechanical Engineering
Depositing User:	Mrs. Siti Noraida Miskan
Date Deposited:	21 Nov 2021 08:12
Last Modified:	21 Nov 2021 08:12
URI:	http://eprints.uthm.edu.my/id/eprint/3709

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