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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.19 [2012] >
IJEMS Vol.19(1) [February 2012] >
| Title: | Stress intensity factors under combined tension and torsion loadings |
| Authors: | Ismail, A E
Ariffin, A K
Abdullah, S
Ghazali, M J |
| Keywords: | Stress intensity factor
Surface crack
Finite element analysis
Combined loadings |
| Issue Date: | Feb-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | This paper numerically
discusses the stress intensity factor (SIF) calculations for surface cracks in
round bars subjected to combined loadings. Different crack aspect ratios, a/b ranged 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 loading is
non-symmetrical, the whole finite element model is constructed. Then, both
tension and torsion loadings are remotely applied to the finite element model
and the SIFs are determined along the crack front of various crack geometries.
An equivalent SIF method is then explicitly used to combine the individual SIF
obtained using different loadings. A comparison is made between the combined
SIFs obtained using the equivalent SIF method and finite element analysis (FEA)
under similar loadings. It is found that the equivalent SIF method successfully
predicted the combined SIF for Mode I. However, discrepancies between the results,
which have been determined from the different approaches, occurred when FIII is involved. Meanwhile,
it is also noted that the predicted SIF using FEA is higher than the predicted through
the equivalent SIF method due to the crack face interactions. |
| Page(s): | 5-16 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.19(1) [February 2012]
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