Stress intensity factors under combined bending and torsion moments

Ismail, Al Emran and Ariffin, Ahmad Kamal and Abdullah, Shahrum and Ghazali, Mariyam Jameelah and Abdulrazzaq, Mohammed and Daud, Ruslizam (2012) Stress intensity factors under combined bending and torsion moments. Journal of Zhejiang University - Science A, 13 (1). pp. 1-8. ISSN 1673-565X

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Official URL: http://dx.doi.org/10.1631/jzus.A1100040

Abstract

This paper discusses stress intensity factor (SIF) calculations for surface cracks in round bars subjected to combined torsion and bending loadings.Different crack aspect ratios, nib, ranging from 0 0 to 1.2 and relative crack depths, a/D, ranging from 0, I to 0.6 were considered Since the loading was non-symmetrical for torsion loadings, a whole finite element model was constructed, Then, the individual and combined bending and torsion loadings were remotely applred to the model. The equ~valent SIF method, F ; ~ ,w as then used explicitly to combine the individual SlFs from the bending and torsion loadings A comparison was then carried out with the combined SIF, F*FE obtained using the finite element analysis (FEA) under similar loadings. It was found that the equivalent SIF method successfully predicted the combined SIF for Mode I However, discrepancies between the results determined from the different approaches occurred when FIII was involved It was also noted that the predicted F*FE FEA was higher than the F*EQ predicted through the equivalent SIF method due to the difference in crack face interactions.

Item Type:Article
Uncontrolled Keywords:stress intensity factor (SIF); combined loadings; finite element analysis (FEA); surface cracks; round solid bars
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:3864
Deposited By:Normajihan Abd. Rahman
Deposited On:24 Jun 2013 08:58
Last Modified:22 Jan 2015 08:14

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