Interaction of External Surface Cracks on Thick Cylinders under Mode III Moment and Combined with Mode I Loading
Interaction of External Surface Cracks on Thick Cylinders under Mode III Moment and Combined with Mode I Loading |
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| © 2024 by IJETT Journal | ||
| Volume-72 Issue-5 |
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| Year of Publication : 2024 | ||
| Author : Al-Moayed, O.M, Al Emran Ismail, Kareem, Ali K |
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| DOI : 10.14445/22315381/IJETT-V72I5P106 | ||
How to Cite?
Al-Moayed, O.M, Al Emran Ismail, Kareem, Ali K, "Interaction of External Surface Cracks on Thick Cylinders under Mode III Moment and Combined with Mode I Loading," International Journal of Engineering Trends and Technology, vol. 72, no. 5, pp. 51-57, 2024. Crossref, https://doi.org/10.14445/22315381/IJETT-V72I5P106
Abstract
Thick-walled cylinder is widely used in modern engineering and applications and they are used to withstand high internal and external pressure. Sometimes, it is used to transmit power from one to another points which is generally subjected to torsion or mode III moments. Under certain circumstances, external cracks are formed due to corrosion and material defects, which lead to premature failure. In this paper, ANSYS finite element analysis software is used to construct the cracks on the surface of thick cylinders under mode III and combined mode I and III loading conditions. Various crack geometries and configurations are used, such as crack aspect ratios, a/c = 0.4, 0.6, 0.8, 1.0 and 1.2 and relative crack depth, a/t = 0.2, 0.5 and 0.8. For parallel cracks, different relative distances, s/L is used, such as 0.004, 0.008, 0.016 and 0.032. According to the numerical results, if the number of cracks is more than two, the SIFs decrease when compared with a single crack. In terms of crack interactions, as expected, the degree of interaction is diminished when the cracks are away from each other. Also, it is shown that crack interaction influence for parallel cracks is demonstrated by shielding interaction influence only, while both shielding and amplification impacts are produced for non-coplanar cracks. The crack separation distance (horizontal and angular) between the cracks displayed substantial influence on interaction since it exhibited the ability to convert the interaction behavior from shielding to amplification impact (for angular).
Keywords
Crack interactions, Surface crack, Thick cylinder, Finite Element Analysis.
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