Stress intensity factors under combined bending and torsion moments
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 w...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Published: |
Zhejiang University Springer
2012
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1631/jzus.A1100040 http://dx.doi.org/10.1631/jzus.A1100040 http://eprints.uthm.edu.my/3864/1/al_emran_ismail_2_U.pdf |
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| Summary: | 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. |
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