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DETERMINATION OF CRITICAL SIZE OF CORROSION PIT ON MECHANICAL ELEMENTS IN HYDRO POWER PLANTS
Authors:
Radivoje M. Mitrović1
, Dejan B. Momčilović2, Ivana D. Atanasovska3
1University of Belgrade, Faculty of Mechanical Engineering, Serbia
2Institute IMS, Belgrade, Serbia
3Mathematical Institute of the Serbian Academy of Sciences and Arts, Belgrade, Serbia
Received: 05.01.2018.
Accepted: 27.02.2018.
Available: 15.03.2018.
Abstract:
Researchers in the field of fracture mechanics, predominantly developing appropriate solution algorithms for problems of solid bodies with cracks. Problems in mechanics generally, related with fracture and fatigue for solid bodies with various geometries of sharp notches, are studied to a much lesser extent. This situation can be explained by analytical difficulties arising in solving problems of elasticity theory for bodies with rounded notches. To solve problems of such class, starting from data on stress concentration in the rounded notch tip with a significant radius of curvature, simplified solutions with are therefore of great importance. Recent years, due to constant rise of computing power and development of numerical methods, re-evaluation of stress concentration factors from a viewpoint of theory of elasticity is present. This is mainly as a feedback from industry, which have requirements toward mega and nanostructures.
Corrosion represents an important limitation to the safe and reliable use of many alloys in various industries. Pitting corrosion is a form of serious damage on metals surface such as high-strength aluminum alloys and stainless steel, which are susceptible to pitting when exposed to a corrosive attack in aggressive environments. This is particularly valid for dynamic loaded structures.
The basic idea behind this paper is finding links between different scientific and engineering disciplines, which will enable useful level of applicability of existing knowledge. The subject of this paper is application of new method of determine length scale parameter for estimating the mechanistic aspect of corrosion pit under uniaxial/multiaxial high-cycle fatigue loading…
Keywords:
Stress concentration,fatigue,multiaxial fatigue,corrosion pit,critical distance
References:
[1] M.P. Savruk, A. Kazberuk, StressConcentration at Notches. Springer, 2016. https://doi.org/10.1007/978-3-319-44555-7
[2] D. Taylor, The theory of critical distances: a new perspective in fracture mechanics. Elsevier, 2010.
[3] L. Susmel, The theory of critical distances: a review of its applications in fatigue. Engineering Fracture Mechanics, 75 (7), 2008:1706-1724. https://doi.org/10.1016/j.engfracmech.2006.12.004
[4] L. Susmel, D. Taylor, Can the conventional high-cycle multiaxial fatigue criteria be reinterpreted in terms of the theory of critical distances?. SDHM, 2 (2), 2006: 91-108.
[5] L. Susmel, D. Taylor, The modified Wöhler curve method applied along with the theory of critical distances to estimate finite life of notched components subjected to complex multiaxial loading paths. Fatigue & Fracture of Engineering Materials & Structures, 31 (12), 2008: 1047-1064. https://doi.org/10.1111/j.1460-2695.2008.01296.x
[6] L. Susmel, Multiaxial notch fatigue. Elsevier, 2009.
[7] H. Askes, P. Livieri, L. Susmel, D. Taylor, R. Tovo, Intrinsic material length, Theory of Critical Distances and Gradient Mechanics: analogies and differences in processing linear‐ elastic crack tip stress fields. Fatigue & Fracture of Engineering Materials & Structures, 36 (1), 2013: 39-55. https://doi.org/10.1111/j.1460-2695.2012.01687.x
[8] L. Susmel, H. Askes, T. Bennett, D. Taylor, Theory of critical distances versus gradient mechanics in modelling the transition from the short to long crack regime at the fatigue limit. Fatigue & Fracture of Engineering Materials & Structures, 36 (9), 2013: 861-869. https://doi.org/10.1111/ffe.12066
[9] E. C. Aifantis, Gradient material mechanics: perspectives and prospects. Acta Mechanica, 225 (4-5), 2014: 999-1012. https://doi.org/10.1007/s00707-013-1076-y
[10] T. J. Charlton, W. M. Coombs, C. E. Augarde, Gradient elasticity with the material point method. Cardiff University, 2016.
[11] C. Bagni, H. Askes, L. Susmel, Gradient elasticity: a transformative stress analysis tool to design notched components against uniaxial/multiaxial high‐cycle fatigue. Fatigue & Fracture of Engineering Materials & Structures, 39 (8), 2016: 1012-1029. https://doi.org/10.1111/ffe.12447
[12] D. Momčilović, Z. Odanović, R. Mitrović, I. Atanasovska, T. Vuherer, Failure analysis of hydraulic turbine shaft. Engineering failure analysis, 20 (-), 2012: 54-66. https://doi.org/10.1016/j.engfailanal.2011.10.006
[13] D. Momčilović, R. Mitrović, I. Atanasovska, Stress Concentration and Fatigue of Materials (In Serbian). Faculty of Mechanical Engineering, University of Belgrade, 2016.
[14] I. Atanasovska, M. Jelić, R. Mitrović, D. Momčilović, The Influence of Corrosion on Stress Concentration Factor at Shaft to Flange Radius. In: Dobre G. (eds) Power Transmissions. Mechanisms and Machine Science, Vol.13. Springer, Dordrecht, 2013. https://doi.org/10.1007/978-94-007-6558-0_53
[15] R. Mitrovic, D. Momcilovic, I. Atanasovska, Assessment of the Effect of Pitting Corrosion on Fatigue Crack Initiation in Hydro Turbine Shaft. Advanced Materials Research, 633 (-), 2013: 186-196.
https://doi.org/10.4028/www.scientific.net/AMR.633.186
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0)
Volume 9
Number 3
September 2024
Last Edition
Volume 9
Number 3
September 2024
How to Cite
R.M. Mitrovic, D.B. Momčilović, I.D. Atanasovska, Determination of Critical Size of Corrosion Pit on Mechanical Elements in Hydro Power Plants. Applied Engineering Letters, 3(1), 2018: 1–5.
https://doi.org/10.18485/aeletters.2018.3.1.1
More Citation Formats
Mitrovic, R. M., Momčilović, D.B., & Atanasovska, I.D. (2018). Determination of Critical Size of Corrosion Pit on Mechanical Elements in Hydro Power Plants. Applied Engineering Letters, 3(1), 1–5. https://doi.org/10.18485/aeletters.2018.3.1.1
Mitrovic, Radivoje, et al. Determination of Critical Size of Corrosion Pit on Mechanical Elements in Hydro Power Plants. Applied Engineering Letters, vol.3, no.1, 2023, pp. 1–5, https://doi.org/10.18485/aeletters.2018.3.1.1.
Mitrovic, M. Radivoje, Dejan B. Momčilović, and Ivana D. Atanasovska. 2018. “Determination of Critical Size of Corrosion Pit on Mechanical Elements in Hydro Power Plants” Applied Engineering Letters, 3 (1): 1–5. https://doi.org/10.18485/aeletters.2018.3.1.1.
Mitrovic, R.M, Momčilović, D.B. and Atanasovska, I.D. (2018). Determination of Critical Size of Corrosion Pit on Mechanical Elements in Hydro Power Plants. Applied Engineering Letters, 3(1), pp.1–5. doi: 10.18485/aeletters.2018.3.1.1.
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DETERMINATION OF CRITICAL SIZE OF CORROSION PIT ON MECHANICAL ELEMENTS IN HYDRO POWER PLANTS
Authors:
Radivoje M. Mitrović1
, Dejan B. Momčilović2, Ivana D. Atanasovska3
1University of Belgrade, Faculty of Mechanical Engineering, Serbia
2Institute IMS, Belgrade, Serbia
3Mathematical Institute of the Serbian Academy of Sciences and Arts, Belgrade, Serbia
Received: 05.01.2018.
Accepted: 27.02.2018.
Available: 15.03.2018.
Abstract:
Researchers in the field of fracture mechanics, predominantly developing appropriate solution algorithms for problems of solid bodies with cracks. Problems in mechanics generally, related with fracture and fatigue for solid bodies with various geometries of sharp notches, are studied to a much lesser extent. This situation can be explained by analytical difficulties arising in solving problems of elasticity theory for bodies with rounded notches. To solve problems of such class, starting from data on stress concentration in the rounded notch tip with a significant radius of curvature, simplified solutions with are therefore of great importance. Recent years, due to constant rise of computing power and development of numerical methods, re-evaluation of stress concentration factors from a viewpoint of theory of elasticity is present. This is mainly as a feedback from industry, which have requirements toward mega and nanostructures.
Corrosion represents an important limitation to the safe and reliable use of many alloys in various industries. Pitting corrosion is a form of serious damage on metals surface such as high-strength aluminum alloys and stainless steel, which are susceptible to pitting when exposed to a corrosive attack in aggressive environments. This is particularly valid for dynamic loaded structures.
The basic idea behind this paper is finding links between different scientific and engineering disciplines, which will enable useful level of applicability of existing knowledge. The subject of this paper is application of new method of determine length scale parameter for estimating the mechanistic aspect of corrosion pit under uniaxial/multiaxial high-cycle fatigue loading…
Keywords:
Stress concentration,fatigue,multiaxial fatigue,corrosion pit,critical distance
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0)
Volume 9
Number 3
September 2024
Last Edition
Volume 9
Number 3
September 2024