PSI - Issue 33

Vitor E.L. Paiva et al. / Procedia Structural Integrity 33 (2021) 159–170 Author name / Structural Integrity Procedia 00 (2019) 000–000

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5. Conclusions This paper has shown the highly successful combined use of two experimental techniques (Digital Image Correlation (DIC) and Fiber Optic Bragg Strain Gages (FBSG)) to accurately determine strain distributions and to locate hot-spots in dented pipeline specimens subjected to fatigue damage caused by the application of pressurized cycles. The full-field 3-D DIC technique helped instrumenting the hot-spot sites with the fiber optic gages. The strains measured using the fiber optic gages showed that the deformations actuating in the dented area did not suffer reasonable influence from the soil coverture. Moreover, it was concluded that the fatigue life of the buried specimens can be accurately predicted with a simple Coffin-Manson equation that uses the actual material mechanical properties and the actual hot-spot measured circumferential strain amplitudes. Acknowledgements The authors would like to acknowledge the Center for Pipeline Technology (CTDUT) and the financial support of the PUC-CENPES-PETROBRAS Research Project (Project SIGITEC 0050-0101-263-16-9 TCBR-409). References Akbari a. R.; Jafari S., Hosseinipour S. J., 2015. Load Bearing Capacity of a Dented Aluminum Pipe Subjected to Internal Pressure Considering the Effect of Ductile Damage. Latin American Journal of Solids and Structures, v. 12, n. 2, p. 355-384. API 579-1/ASME FFS-1. Fitness-for-Service, 2016. American Petroleum Institute, American Society of Mechanical Engineers, Washington DC. Bolton, B., Semiga, V., Dinovitzer, A., Tiku, S., Alexander, C., 2008. Towards a Validated Pipeline Dent Integrity Assessment Model. IPC2008 64621. Proceedings of the 7th International Pipeline Conference, Calgary, Alberta, Canada. Bolton, B., Semiga, V., Tiku, S., Dinovitzer, Zhou, J., 2010. Full Scale Cyclic Fatigue Testing of Dented Pipelines and Development of a Validated Dented Pipe Finite Element Model. IPC2010-31579. Proceedings of the 8th International Pipeline Conference, Calgary, Alberta, Canada. Castro J. T. P.; Meggiolaro M.A., 2016. Fatigue Design Techniques, volume 1: High-Cycle Fatigue. CreateSpace. Correlated Solutions Inc., 2019. VIC-3D v.8, http://www.correlatedsolutions.com/. Cosham, A., Hopkins P., 2004. The effect of dents in pipelines—guidance in the pipeline defect assessment manual. International Journal of Pressure Vessels and Piping, v. 81, n. 2, p. 127-139. Fowler, J. R., 1993. Criteria for dent acceptability in offshore pipeline. In: Offshore Technology Conference. Offshore Technology Conference. Freire, J. L. F., Paiva, V. E. L., Gonzáles, G. L. G., Vieira, R. D., Maneschy, J. E., D’Almeida A.L.F.S., 2020. Fatigue assessment of dented pipeline specimens. In ASME 2020 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers. Garbatov Y., Soares C. G., 2017. Fatigue reliability of dented pipeline based on limited experimental data. International Journal of Pressure Vessels and Piping, v. 155, p. 15-26. Jones, E., Iadicola, M. A., 2018. Good practices guide for digital image correlation, International Digital Image Correlation Society. Paiva, V. E. L., Gonzáles, G. L. G., Vieira, R. D., Maneschy, J. E., Vieira, R. B., Freire, J. L. F., 2018. Fatigue Monitoring of a Dented Piping Specimen Using Infrared Thermography. In ASME 2018 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers. Paiva, V. E. L., Gonzáles, G. L. G., Vieira, R. D., Maneschy, J. E., Ribeiro, A.S., D’Almeida, A.L.F.S. Freire, J. L. F., 2019. Fatigue Assessment and Monitoring of a Dented Pipeline Specimen. In ASME 2019 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers. Paiva, V.E.L., 2020. Modern Experimental Techniques with an Emphasis on Infrared Thermography to the Assessment of Fatigue Components with Dents, DSc Dissertation, Mechanical Engineering Department, Pontifical Catholic University of Rio de Janeiro, PUC-Rio. Pinheiro, B.C., Pasqualino, I.P., 2009. Fatigue Analysis of Damaged Steel Pipelines under Cyclic Internal Pressure. International Journal of Fatigue 31 p962-973. Rosenfeld, M.J., Pepper, J.W., Leewis, K., 2002. Basis of the New Criteria in ASME B31.8 for Prioritization and Repair of Mechanical Damage. IPC2002-27122, Proceedings of the 4th International Pipeline Conference, Calgary, Alberta, Canada. Sutton M.A., Orteu J.J., Schreier H., 2009. Image correlation for shape, motion and deformation measurements: basic concepts, theory and applications, Springer Science & Business Media.