PSI - Issue 7

Ivo Černý et al. / Procedia Structural Integrity 7 (2017) 431 – 437 Ivo Černý / St ructural Integrity Procedia 00 ( 2017) 000–000

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confirmed fatigue growth of at least some of the defects. − FCG rates in the X60 steel corresponded to very rough material variability caused likely by unstable manufacturing parameters. The scatter of C parameter corresponded to Weibull distribution unlike the other two steels, where the C distribution was optimally fitted by normal probability density. − On the basis of Monte Carlo simulations of the software, safe inspection intervals could be optimised. The shortest intervals had to be considered for the X70 steel whilst in case of X60 steel, such intervals could be almost twice as much long. Acknowledgements Financial support of grant TH02010664 of the Technology Agency of the Czech Republic and institutional support of the Ministry of Industry and Trade is acknowledged. References Russo, P., Parisi, F., 2016. Risk-targeted safety distance of reinforced concrete buildings from natural-gas transmission pipelines. Reliability Engineering & System Safety 148, 57-66. Proc. of the 27 th Pipeline Pigging and Integrity Management Conference, Clarion Technical Conferences, USA (2015) 392 p. Lauschmann, H., 1987. A stochastic model of fatigue crack growth in heterogeneous materials. Engineering Fracture Mechanics 26, 707-728. Seyedi, M., Hild, F., 2004. A probabilistic model for the formation and propagation of crack networks in high cycle thermomechanical fatigue. Proceedings of the Conf. Probabilistic Life / Crack Assessment and Preventive Maintenance in Industrial Plant, Le Mat Hamata, N., Shibli, I.A. (Eds.), Churchill College, Cambridge, 21-22. 9. 2004. Le Mat Hamata, N., Korouš, J., 2004. Remaining life assessment of a cracked Y-piece using deterministic and probabilistic approaches. Ibid. Beretta, S., Regazzi, D., 2016. Probabilistic fatigue assessment for railway axles and derivation of a simple format for damage calculations. International Journal of Fatigue 86, 13-23. Romano, S., Manenti, D., Beretta, S., Zerbst, U., 2016. Semi-probabilistic method for residual lifetime of aluminothermic welded rails with foot cracks. Theoretical and Applied Fracture Mechanics 85, 398-411. Deschanels, H., Escaravage, C., Thiry, J.M., Le Mat Hamata, N., Colantoni, D., (2006). Assessment of industrial components in high temperature plant using the "ALIAS-HIDA" - A case study. Engineering Failure Analysis 13 (5), 767-779. Jovanovic, A., Maile, K., Wagemann, G., Le Mat-Hamata, N., Gampe, U., Andersson, P., Segle, P., Gelineau, O., (2001). Assessment of cracks in power plant components by means of the HIDA knowledge-based system (KBS). Int. J. of Pressure Vessels and Piping 78, 1053-1069. Černý, I., 2001. Measurement of subcritical growth of defects in large components of nuclear power plants at elevated tempera tures. International Journal of Pressure Vessels and Piping 78, 893-902. Černý, I., 2004. The use of DCPD method for measurement of growth of cracks in large components at normal and elevated temper atures. Engineering Fracture Mechanics 71, 837-848. Linhart, V., Sigmundová, J., Rábl V., 2008. Resistance of steels applied in gas transmission pipelines to stress corrosion cracking. Slovgas 5, 12 15. Černý, I., 2004. A simple engineering probabilistic assessment method of fatigue crack growth in the stable Paris region. Pro c. of the 4 th International Conference "Probabilistic Life / Crack Assessment and Preventive Maintenance in Industrial Plant", Cambridge 21 – 22 September 2004, Le Mat Hamata, N. and Shibloi I.A. Eds., European Technology Development. Luke, M., Varfolomeev, I., Lütkepohl, K., Esderts, A., 2010. Fracture mechanics assessment of railway axles: Experimental characterization and computation. Engineering Failure Analysis 17, 617-623. Černý, I., Linhart, V., 2004. An evaluation of the resistance of pipeline steels to initiation and early growth of stress cor rosion cracks. Engineering Fracture Mechanics 71, 913-921. Jiang, Y., Chen, M., 2012. Researches on the fatigue crack propagation of pipeline steel. Energy Procedia 14, 524 – 528. Černý, I., Linhart, V., Hnilica, F., 1993. Influence of changing of microstructure by the heat -treatment on fatigue-crack growth-properties of the carbon cast steel. Computer Methods and Experimental Measurements for Surface Treatment Effects, WIT Transactions on Engineering Sciences 2, Aliabadi, M.H., Brebbia, C.A. (Eds.), 239-252. Zerbst, U., Beretta, S., Köhler G., Lawton A., Vormwald M., Beier H.Th., Klinger C., Černý, I., Rudlin J., Heckel T., Klingbe il D., 2013. Safe life and damage tolerance aspects of railway axles – A review. Engineering Fracture Mechanics 98, 214-271. Fajkoš, R., Strnadel, B., Zima, R., 2014. Fatigue limit of induction hardened railway axles. METAL 2014: 23 rd International Conference on Metallurgy and Materials, 587-592. Tkáč, T., Fajkoš, R., Zima, R., 2016. Comparison of fatigue characteristic and crack propagation tests performed on standard and induction hardened axles produced from steel grade EA4T. METAL 2016: 25 th Anniversary International Conference on Metallurgy and Materials, 555-561. Bagaviev, A., 2004. Life assessment of steam turbine components based on probabilistic procedures. Ibid. Bielak, O., Korouš, J., Bína, V., 2004. Probabilistic assessment of a 200 MW unit platen -type superheater. Ibid.