Ваш браузер устарел.

Для того, чтобы использовать все возможности сайта, загрузите и установите один из этих браузеров.

скрыть

Article

  • Title

    Elastic tripping analysis of corroded flat-bar stiffeners

  • Authors

    Rahbar-Ranji Ahmad

  • Subject

    MACHINE BUILDING. PROCESS METALLURGY. MATERIALS SCIENCE

  • Year 2016
    Issue 3(50)
    UDC [624.014.2:620.193].001.5
    DOI 10.15276/opu.3.50.2016.04
    Pages 12-20
  • Abstract

    Tripping of stiffeners is one of the buckling modes of stiffened panel which could rapidly lead to its catastrophic failure. Loss of thickness in web and flange due to corrosion reduces elastic buckling strength of stiffeners. It is common practice to assume a uniform thickness reduction for general corrosion. Since the real corroded plate has rough surfaces, to estimate the remaining strength of corroded structures, typically a much higher level of accuracy is required. There is a little study on strength analysis of corroded plates with rough surface especially as a function of corrosion degrees. The aim of present work is to analyze elastic tripping stress of flat bar stiffeners with both-sided corroded surfaces. Undulated surfaces are generated based on the power spectrum of the corroded surface. Elastic tripping stress is calculated using ANSYS code. Finite elements method is employed to analyze elastic tripping stress of corroded steel flat bars with both sided rough surfaces. Comparing the results with elastic tripping strength of corroded flat bars with uniform thickness, a reduction factor is proposed. It is found that reduction factor of buckling strength by uniform thickness assumption is overestimated.

  • Keywords corroded steel plate, tripping, FEM, rough surface
  • Viewed: 420 Dowloaded: 0
  • Download Article
  • References

    Література
    1.    Nakai, T. Effect of pitting corrosion on the ultimate strength of steel plates subjected to in-plane compression and bending / T. Nakai, H. Matsushita, N. Yamamoto // Journal of Marine Science and Technology. — 2006. — Vol. 11, Issue 1. — PP. 52—64.
    2.    Jiang, X. Ultimate capacity behavior of pitted mild steel plates under biaxial compression / X. Jiang, C. Guedes Soares // Proceedings of 30th International Conference on Ocean, Offshore and Arctic Engineering (ASME 2011). — New York: ASME, 2011. — Vol. 2. — PP. 721—728.
    3.    Ultimate strength assessment of hull structural plate with pitting corrosion damnification under biaxial compression / Y. Huang, Y. Zhang, G. Liu, Q. Zhang // Ocean Engineering. — 2010. — Vol. 37, Issues 17–18. — PP. 1503—1512.
    4.    Wang, G. Assessment of corrosion risks to aging ships using an experience database / G. Wang, J. Spencer, H. Sun // Journal of Offshore Mechanics and Arctic Engineering. — 2005. — Vol. 127, Issue 2. — PP. 167—174.
    5.    Rahbar-Ranji, A. (2001). Stress analysis of a randomly undulated plate due to corrosion in marine structures [Електронний ресурс] / A. Rahbar-Ranji. — Yokohama: Yokohama National University, 2001. — Режим доступу: http://ci.nii.ac.jp/naid/500000211484 (Дата звернення: 11.08.2016).
    6.    Rahbar Ranji, A. Plastic collapse load of corroded steel plates / A. Rahbar Ranji // Sadhana. — 2012. — Vol. 37, Issue 3. — PP. 341—349.
    7.    Rahbar-Ranji, A. Ultimate strength of corroded steel plates with irregular surfaces under in-plane compression / A. Rahbar-Ranji // Ocean Engineering. — 2012. — Vol. 54. — PP. 261—269.
    8.    Rahbar Ranji, A. Buckling analysis of corroded angle beams with irregular random surfaces / A. Rahbar Ranji // Journal of Failure Analysis and Prevention. — 2016. —Vol. 16, Issue 5. — PP. 912—918.
    9.    Rahbar-Ranji, A. Elastic buckling strength of corroded steel plates / A. Rahbar-Ranji // Sadhana. — 2013. — Vol. 38, Issue 1. — PP. 89—99.
    10.    Goda, Y. Numerical experiments on wave statistics with spectral simulation / Y. Goda // Report of the Port and Harbour Research Institute. — 1970. — Vol. 9, Issue 3. — PP. 3—57.
    11.    Timoshenko, S.P. Theory of Elastic Stability / S.P. Timoshenko, J.M. Gere. — 2nd Ed. — Mineola, N.Y.: Dover, 2009. — 541 p.
    12.    Hull Structural Design, Ships with Length 100 Metres and above [Електронний ресурс] / Det Norske Veritas // DNV Rules for Classification of Ships. — 2009. — Режим доступу: https://rules.dnvgl.com/servicedocuments/dnv (Дата звернення: 11.08.2016).
    13.    Time-varying ultimate strength of aging tanker deck plate considering corrosion effect / J. Guo, G. Wang, L. Ivanov, A.N. Perakis // Marine Structures. — 2008. — Vol. 21, Issue 4. — PP. 402—419.
    14.    Southwell, C.R. Estimating service life of steel in seawater / C.R. Southwell, J.D. Bultman, C.W. Hummer // В кн.: Seawater Corrosion Handbook / ed. by M. Schumacher. — New Jersey: Noyes Data Corporation, 1979. — PP. 374—387.
    15.    Yamamoto, N. A study on the degradation of coating and corrosion of ship’s hull based on the probabilistic approach / N. Yamamoto, K. Ikegami // Journal of Offshore Mechanics and Arctic Engineering. — 1998. — Vol. 120, Issue 3. — PP. 121—128.
    16.    Guedes Soares, C. Effect of environmental factors on steel plate corrosion under marine immersion conditions / C. Guedes Soares, Y. Garbatov, A. Zayed // Corrosion Engineering, Science and Technology. — 2011. — Vol. 46, Issue 4. — PP. 524—541.
    17.    Rahbar Ranji, A. Mechanical properties and corrosion resistance of normal strength and high strength steels in chloride solution / A. Rahbar Ranji, A.H. Zakeri // Journal of Naval Architecture and Marine Engineering. — 2010. — Vol. 7, Issue 2. — PP. 94—100.
    18.    Oszvald, K. Effect of corrosion on the buckling of steel angle members – experimental study / K. Oszvald, L. Dunai // Periodica Polytechnica – Civil Engineering. — 2012. — Vol. 56, Issue 2. — PP. 175—183.

    References
    1.    Nakai, T., Matsushita, H., & Yamamoto, N. (2006). Effect of pitting corrosion on the ultimate strength of steel plates subjected to in-plane compression and bending. Journal of Marine Science and Technology, 11(1), 52–64. DOI:10.1007/s00773-005-0203-4
    2.    Jiang, X., & Guedes Soares, C. (2011). Ultimate capacity behavior of pitted mild steel plates under biaxial compression. In Proceedings of 30th International Conference on Ocean, Offshore and Arctic Engineering (ASME 2011) (Vol. 2, pp. 721-728). New York: ASME. DOI:10.1115/OMAE2011-49980
    3.    Huang, Y., Zhang, Y., Liu, G., & Zhang, Q. (2010). Ultimate strength assessment of hull structural plate with pitting corrosion damnification under biaxial compression. Ocean Engineering, 37(17–18), 1503–1512. DOI:10.1016/j.oceaneng.2010.08.001
    4.    Wang, G., Spencer, J., & Sun, H. (2005). Assessment of corrosion risks to aging ships using an experience database. Journal of Offshore Mechanics and Arctic Engineering, 127(2), 167–174. DOI:10.1115/1.1894404
    5.    Rahbar-Ranji, A. (2001). Stress analysis of a randomly undulated plate due to corrosion in marine structures (PhD thesis, Yokohama National University). Yokohama: Yokohama National University.
    6.    Rahbar Ranji, A. (2012). Plastic collapse load of corroded steel plates. Sadhana, 37(3), 341–349. DOI:10.1007/s12046-012-0084-2
    7.    Rahbar-Ranji, A. (2012). Ultimate strength of corroded steel plates with irregular surfaces under in-plane compression. Ocean Engineering, 54, 261–269. DOI:10.1016/j.oceaneng.2012.07.030
    8.    Rahbar Ranji, A. (2016). Buckling analysis of corroded angle beams with irregular random surfaces. Journal of Failure Analysis and Prevention, 16(5), 912–918. DOI:10.1007/s11668-016-0173-3
    9.    Rahbar-Ranji, A. (2013). Elastic buckling strength of corroded steel plates. Sadhana, 38(1), 89–99. DOI:10.1007/s12046-013-0116-6
    10.    Goda, Y. (1970). Numerical experiments on wave statistics with spectral simulation. Report of the Port and Harbour Research Institute, 9(3), 3–57.
    11.    Timoshenko, S.P., & Gere, J.M. (2009). Theory of Elastic Stability (2nd Ed.). Mineola, N.Y.: Dover.
    12.    Det Norske Veritas. (2009). Hull Structural Design, Ships with Length 100 Metres and Above. DNV Rules for Classification of Ships. Retrieved from https://rules.dnvgl.com/servicedocuments/dnv
    13.    Guo, J., Wang, G. Ivanov, L., & Perakis, A.N. (2008). Time-varying ultimate strength of aging tanker deck plate considering corrosion effect. Marine Structures, 21(4), 402–419. DOI:10.1016/j.marstruc.2008.03.002
    14.    Southwell, C.R., Bultman, J.D., & Hummer, C.W. (1979). Estimating service life of steel in seawater. In M. Schumacher (Ed.), Seawater Corrosion Handbook (pp. 374-387). New Jersey: Noyes Data Corporation.
    15.    Yamamoto, N., & Ikegami, K. (1998).  A study on the degradation of coating and corrosion of ship’s hull based on the probabilistic approach. Journal of Offshore Mechanics and Arctic Engineering, 120(3), 121–128. DOI:10.1115/1.2829532
    16.    Guedes Soares, C., Garbatov, Y., Zayed, A. (2011). Effect of environmental factors on steel plate corrosion under marine immersion conditions. Corrosion Engineering, Science and Technology, 46(4), 524–541. DOI:10.1179/147842209X12559428167841
    17.    Rahbar Ranji, A., & Zakeri, A.H. (2010). Mechanical properties and corrosion resistance of normal strength and high strength steels in chloride solution. Journal of Naval Architecture and Marine Engineering, 7(2), 94–100. DOI:10.3329/jname.v7i2.5309
    18.    Oszvald, K., & Dunai, L. (2012). Effect of corrosion on the buckling of steel angle members – experimental study. Periodica Polytechnica – Civil Engineering, 56(2), 175–183. DOI:10.3311/pp.ci.2012-2.04

  • Creative Commons License by Author(s)