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Proceedings 2018, 2(8), 517;

Analysis of Inclined Cracks in Thin-Walled Circular Tube under Mixed-Mode I + II Fracture

Nondestructive Testing and Physics, Vaal University of Technology, Vanderbijlpark 1911, South Africa
Presented at the 18th International Conference on Experimental Mechanics (ICEM18), Brussels, Belgium, 1–5 July 2018.
Published: 30 June 2018
PDF [535 KB, uploaded 25 July 2018]


This paper provides a study on mixed-mode fracture mechanics in thin-walled tube which is subjected to tension, shear and torsion loading. This type of loading causes an inclined crack to develop and generate a mixture of normal and shear stresses ahead of a crack tip. The stress state ahead of a crack tip is frequently based on mixed-mode type of interactions which designate the amplitude of the crack tip stresses. The analytical expressions for the stress intensity factors for mixed-mode I + II approach are presented. The Paris law for mixed-modes I + II has been discussed. Mixed-mode fracture mechanics is used with theoretical models to predict the path of crack growth when an inclined crack is subjected to a combination of mode I and mode II deformations. The torque at which crack propagation can be expected has been determined. The numerical calculations have been carried out by using MATLAB code. The results are good and could be useful for companies working with thin-walled circular tubes.
Keywords: inclined cracks; thin-walled tube; mixed-mode I + II inclined cracks; thin-walled tube; mixed-mode I + II
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Mabuza, B.R. Analysis of Inclined Cracks in Thin-Walled Circular Tube under Mixed-Mode I + II Fracture. Proceedings 2018, 2, 517.

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