Abstract
The purpose of this research is to investigate the interaction of two adjacent cracks under cyclic loading. A series of tests at different loads and frequencies were conducted under uniaxial constant amplitude fatigue loads on API-5L grade B steel samples. Crack growth rate of two initial semi-elliptical cracks was investigated. Marker band testing technique was employed to study the crack growth rate before and after interaction. Real time optical microscopy was used to observe crack coalescence on the specimens’ surface. Moreover, SEM analysis of the fracture surface was performed for comprehensive understanding of cracks behavior.
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Acknowledgments
The authors would like to thank Abu Dhabi National Oil Company (ADNOC), Abu Dhabi Company for Onshore Oil Operations (ADCO) and the Petroleum Institute (PI). Also, we would like to thank Dr. Mehdi Amiri for his efforts and support.
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© 2015 The Society for Experimental Mechanics, Inc.
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Al Tamimi, A., Modarres, M. (2015). Coalescence and Growth of Two Semi-Elliptical Coplanar Cracks in API-5L Grade B Steel. In: Carroll, J., Daly, S. (eds) Fracture, Fatigue, Failure, and Damage Evolution, Volume 5. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-06977-7_8
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DOI: https://doi.org/10.1007/978-3-319-06977-7_8
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