The fatigue life-time propagation of the connection elements of long-term operated hydro turbines considering material degradation

Abstract


The work deals with development of a new approach for forecasting a high-cycle fatigue life-time of bolted connection of hydro turbines runner. Operation of hydro turbines on normal operation condition does not lead to high stresses rates in bolted connection. However the high cycle fatigue failures have been occurred. High rates stresses occur in bolted connection in transient (start/stop) regimes of hydro turbines operation. The frequency of transient regimes occurrence depends from many factors and defined in this paper as a random function of time. Long-time bolted connection operation lead to natural degradation of material (aging). The degradation process is also a random process of time. So, this work pays attention to developing stochastic mathematical model of damage accumulation that take into account stochastic nature of degradation process and frequency of transient regimes occurrence. Application of the developed models is shown on real engineering example. Degradation of properties has been modeled as a process of the reduction of fatigue (endurance) limit in time. Kinetics of damage accumulation is introduced in the context of the effective stress concept. Mathematical expectation, correlation function and the continuum damage parameter variance have been obtained as functions of time. Analysis of the influence of natural aging process on statistical parameters of damage accumulation as well as on the life-time has been carried out. The stress-strain state of bolted connection is determined by finite element method.

About the authors

O O Larin

National Technical University «Kharkiv Polytechnic Institute», Department of Dynamics and Strength of Machines, Kharkiv, Ukraine

Email: alexeya.larin@gmail.com
21, Frunze st., 61002, Kharkiv, Ukraine Ph.D. in Technical Sciences, Assoc. Professor, Department of Dynamics and Strength of Machines, National Technical University «Kharkiv Polytechnic Institute»

O I Trubayev

National Technical University «Kharkiv Polytechnic Institute», Department of Dynamics and Strength of Machines, Kharkiv, Ukraine

Email: trubayev@gmail.com
21, Frunze st., 61002, Kharkiv, Ukraine Ph.D. in Technical Sciences, Assoc. Professor, Department of Dynamics and Strength of Machines, National Technical University «Kharkiv Polytechnic Institute»

O O Vodka

National Technical University «Kharkiv Polytechnic Institute», Department of Dynamics and Strength of Machines, Kharkiv, Ukraine

Email: a_vodka@mail.ru
21, Frunze st., 61002, Kharkiv, Ukraine Ph.D. student, Department of Dynamics and Strength of Machines, National Technical University «Kharkiv Polytechnic Institute»

References

  1. Failure Analysis Case Studies: A Sourcebook of Case Studies Selected from the Pages of Engineering Failure Analysis 1994-1996. Elsevier, 1998. 433 p.
  2. Failure Analysis Case Studies II: A Sourcebook of Case Studies Selected from the Pages of Engineering Failure Analysis 1997-1999. Pergamon, 2001. 444 p.
  3. Failure Analysis Case Studies III: A Sourcebook of Case Studies Selected from the Pages of Engineering Failure Analysis 2000-2002. Elsevier Science & Technology, 2004. 460 p.
  4. Esaklul K.A. Handbook of Case Histories in Failure Analysis. ASM International, 1993, vol. 2. 583 p.
  5. Yongyao Luo, Zhengwei Wang, Jidi Zeng, Jiayang Lin, Fatigue of piston rod caused by unsteady, unbalanced, unsynchronized blade torques in a Kaplan turbine, Engineering Failure Analysis, 2010, vol. 17, iss. 1, pp. 192-199.
  6. Calin-Octavian Miclosina, Constantin Viorel Campian, Doina Frunzaverde, Vasile Cojocaru. Fatigue Analysis of an Outer Bearing Bush of a Kaplan Turbine. Analele Universităţii Eftimie Murgu Reşiţa. Fascicula de Inginerie, 2011, vol. XVIII, iss. 1, pp. 155-162.
  7. Viorel C. Câmpian, Doina Frunzăverde, Dorian Nedelcu, Gabriela Mărginean. Failure analysis of a kaplan turbine runner blade. 24th Symposium on Hydraulic Machinery and Systems October 27-31, foz do iguassu, 2008, pp. 1-10.
  8. Diego G., Serrano M., Lancha A.M. Failure analysis of a multiplier from a Kaplan turbine, Engineering Failure Analysis, 2000, vol. 7, iss. 1, pp. 27-34.
  9. Arsić M., Bošnjak S., Međo B., Burzić M., Vistać B., Savić Z. Influence of Loading Regimes and Operational Environment on Fatigue State of Components of Turbine and Hydromechanical Equipment at Hydropower, International Conference Power Plants, Zlatibor, Serbia, 2012, pp. 1-10.
  10. Mackerle J. Finite element analysis of fastening and joining: A bibliography (1990-2002), International Journal of Pressure Vessels and Piping, 2003, vol. 80, iss. 4, pp. 253-271.
  11. Kulak G.L., Fisher J.W., Struik J.H.A. Guide to design criteria for bolted and riveted joints. Wiley, 1987. 333 p.
  12. Bickford J.H. Introduction to the Design and Behavior of Bolted Joints. Fourth Edition: Non-Gasketed Joints, Taylor & Francis, 2007. p. 568.
  13. Casanova F. Failure analysis of the draft tube connecting bolts of a Francis-type hydroelectric power plant. Engineering Failure Analysis, 2009, vol. 16, iss. 7, pp. 2202-2208.
  14. Cetin A., Härkegård G. Fatigue life prediction for large threaded components. Procedia Engineering, 2010, vol. 2, iss. 1, pp. 1225-1233.
  15. Libin Z., Fengrui L., Jianyu Z. 3D Numerical Simulation and Fatigue life prediction of high strength threaded bolt. Key Engineering Materials, 2010, vol. 417-418, pp. 885-888.
  16. Zhang L., Feng F., Fan X., Jiang P. Reliability Analysis of Francis Turbine Blade Against Fatigue Failure Under Stochastic Loading. International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering, 15-18 June 2012, pp. 987-990.
  17. Sayano-Shushenskaya power station accident, available at: http:// en.wikipedia.org/wiki/2009_Sayano-Shushenskaya_power_station_accident.
  18. Dunn P.F. Measurement and Data Analysis for Engineering and Science. CRC Press, 2005. 504 p.
  19. Sveshnikov A.A. Applied methods of a random functions theory. Moscow: Science, 1968. 457p.
  20. Gidromekhanicheskie perekhodnye protsessy v gidroenergeticheskikh ustanovkakh. Ed. G.I., Krivchenko. Energiya, 1975. 367 p.
  21. Vladislavlev L.A. Vibratsiya gidroagregatov gidroelektricheskikh stantsij. Energiya, 1972. 176 p.
  22. Yang L., Fatemi A. Cumulative Fatigue Damage Mechanisms and Quantifying Parameters: A Literature Review. ASTM Journal of Testing and Evaluation, 1998, vol. 26, no. 2, pp. 89-100.
  23. Fatemi A., Yang L. Cumulative Fatigue Damage and Life Prediction Theories: A Survey of the State of the Art for Homogeneous Materials. International Journal of Fatigue, 1998, vol. 20, no. 1, pp. 9-34.
  24. Schijve J. Fatigue of structures and materials in the 20th century and the state of the art. International Journal of Fatigue, 2003, no. 25, pp. 679-702.
  25. Lemaitre J., Desmorat R. Engineering damage mechanics: ductile, creep, fatigue and brittle failure. Springer, 2005. 380 p.
  26. Murakami S. A Continuum Mechanics Approachto the Analysis of Damage and Fracture. Springer, 2012. 402p.
  27. Kachanov L.M. Introduction to continuum damage mechanics. Nijhoff Publ., 1986. 135 p.
  28. Manson S.S. Fatigue and Durability of Structural Materials. ASM International, 2006. 456 p.
  29. Schijve J. Fatigue of structures and materials. Springer, 2008. 642 p.
  30. Lvov G.I., Movavgar A. Theoretical and experimental study of fatigue strength of plain woven/epoxy composite. Strojniskivestnik - Journal of mechanical Engineering, 2012, no. 58(2012)3, pp. 175-182.
  31. Plumtree A., Lemaitre J. Interaction of damage mechanisms during high temperature fatigue. Adv: in Fracture Research, vol. 5. Pergamon Press, 1981, pp. 2379-2384.
  32. Durrett R. Probability: theory and examples. Cambridge University Press, 2010. 428 p.
  33. Zhovdak V.A., Tarasova L.F. Predicting the reliability of mechanical systems. NTU «KhPI», 2007. p. 108 (in Russian).
  34. Larin A.A. Prediction and analysis of reliability of engineering structures. NTU «KhPI», 2011. p. 128 (in Russian).
  35. Rathod V., Yadav O.P., Rathore A., Jain R. Probabilistic Modeling of Fatigue Damage Accumulation for Reliability Prediction. International Journal of Quality, Statistics, and Reliability, 2011, vol. 2011, 10 p.
  36. Baldwin J.M., Bauer D.R., Ellwood K.R. Rubber aging in tires. Part 1: Field results, Polymer Degradation and Stability, 2007, vol. 92, pp. 104-109.
  37. Mott P.H., Roland C.M. Aging of natural rubber in air and seawater. Rubber Chemistry and Technology, 2007, vol. 74, pp. 79-88.
  38. Botvina L.R. [et al.] Effect of long-term aging on fatigue characteristics of steel 45. Zavodskaya Laboratoria. Diagnostika Materialov, 2011, vol. 77, pp. 58-61 (in Russian).
  39. Botvina L.R., Petrova I.M., Gadolina I.V. High-cycle fatigue failure of low-carbon steel after long-term aging. Inorganic Materials, 2010, vol. 46 (14), pp. 134-141.
  40. Zaletelj H. [et al.] High cycle fatigue of welded joints with aging influence. Materials and Design, 2013, no. 45, pp. 190-197.
  41. Singh S., Goel B. Influence of thermomechanical aging on fatigue behavior of 2014 Al-alloy. Bulletin of Materials Science, 2005, vol. 28, iss. 2, pp. 91-96.
  42. Hanaki S., Yamashita M., Uchida H., Zako M. On stochastic evaluation of S-N data based on fatigue strength distribution. International Journal of Fatigue, 2010, no. 32(3), pp. 605-609.
  43. Zheng X.-L., Lü B., Jiang H. Determination of probability distribution of fatigue strength and expressions of P-S-N curves. Engineering Fracture Mechanics, vol. 50, 1995, pp. 483-491.
  44. Kowalewski Z.L., Szymczak T., Makowska K., Pietrzak K. Damage Indicators During Fatigue of Metal Matrix Composites. Proceedings of the Fourth International Conference «Nonlinear Dynamics-2013», 2013, Tochka, pp. 386-391.

Statistics

Views

Abstract - 173

Cited-By


PlumX


Copyright (c) 2014 Larin O.O., Trubayev O.I., Vodka O.O.

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

This website uses cookies

You consent to our cookies if you continue to use our website.

About Cookies