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The Effect of Dynamic Bending Moments on the Ratchetting Behavior of Stainless Steel Pressurized Piping Elbows

Received: 9 April 2014     Accepted: 15 April 2014     Published: 30 May 2014
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Abstract

In this paper the ratchetting behavior of four pairs of stainless steel, long and short radius welding elbows is studied under conditions of steady internal pressure and in-plane, resonant dynamic moments that simulated seismic excitations. The finite element analysis with the nonlinear kinematic hardening model has been used to evaluate ratchetting behavior of the elbow under mentioned loading condition. Stress–strain data and material parameters have been obtained from several stabilized cycles of specimens that are subjected to symmetric strain cycles. The results show that the maximum ratcheting strain occurred mainly in the hoop direction at flanks. Ratcheting strain rate increases with increase of the bending loading level at the constant internal pressure. The results show that the FE method gives over estimated values comparing with the experimental data.

Published in International Journal of Mechanical Engineering and Applications (Volume 2, Issue 2)
DOI 10.11648/j.ijmea.20140202.12
Page(s) 31-37
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2014. Published by Science Publishing Group

Keywords

Ratchetting, Pressurized Elbows, Cyclic Bending Moment, Strain Hardening Model, Stainless Steel

References
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[2] Armstrong, P.J., Frederick, C.O., 1966. A mathematical representation of the multi axial Bauschinger effect. CEGB Report RD/B/N 731, Central Electricity Generating Board. The report is reproduced as a paper: 2007. Materials at High Temperatures, 24(1):1-26.
[3] Bari, S., Hassan, T., 2000. Anatomy of coupled constitutive models for ratcheting simulation. Int. J. of Plasticity, 16:381-409.
[4] Bari, S., Hassan, T., 2001. Kinematic hardening rules in uncoupled modeling for multiaxial ratcheting simulation. Int. J. of Plasticity, 17:885-905.
[5] Bari, S., Hassan, T., 2002. An advancement in cyclic plasticity modeling for multiaxial ratcheting simulation. Int. J. of Plasticity, 18:873-894.
[6] Chaboche, J.L., 1986. Time-independent constitutive theories for cyclic plasticity. Int. J. of Plasticity, 2: 149–188.
[7] Chaboche, J.L., 1991. On some modifica-tions of kinematic hardening to improve the description of ratcheting effects. Int. J. of Plasticity, 7:661-678.
[8] Chaboche, J.L, 2008. A review of some plasticity and viscoplasticity constitu-tive theories, Int. J. of Plasticity, 24:1642-1963
[9] Chen X, Gao B, Chen G.,2005. Multiaxial ratcheting of pressurized elbows subjected to reversed in-plane bending. J Pres Eq Syst;3:38-44.
[10] Chen X, Gao B, Chen G.,2006. Ratcheting study of pressurized elbows sub-jected to reversed in-plane bending. J Pres Ves-Trans ASME;128:525-32.
[11] Chen, Xiaohui., Chen, Xu., Yu, Dunji., Gao, Bingjun., 2013. Recent progresses in experimental investigation and finite element analysis of ratcheting in pressurized piping, Int. J. of Pressure Vessels and Piping , 101:113-142.
[12] Lemaitre, J and Chaboche, J.L, 1994. Mechanics of Solid Materials, Pub-lished by Cambridge University Press, ISBN 0521477581, 9780521477581, 584 pag-es.
[13] Mahbadi, H. and Eslami, M.R., 2006. Cyclic loading of thick vessels based on the Prager and Armstrong–Frederick kinematic hardening models. Int. J. of Pressure Vessels and Pip-ing, 83:409-419
[14] Ohno, N., Wang, J.D., 1993. Kinematic hardening rules with critical state of dynamic recovery, part I: formulations and basic features for racheting behavior. J. of Plasticity, 9: 375–390.
[15] Rahman, S.M., Hassan, T., Corona, E., 2008, Evaluation of cyclic plasticity models in ratcheting simulation of straight pipes under cyclic bending and steady internal pres-sure. Int. J. of Plasticity, 24:1756-1791.
[16] Tasnim, H., Kyriakides, S., 1992. Ratcheting in cyclic Plasticity, part I: uniaxial behavior. Int. J. of Plasticity, 8:91–116.
[17] Tasnim, H., Corona, E., Kyriakides, S., 1992. Ratcheting in cyclic plasticity, part II: multiaxial behavior. Int. J. of Plasticity, 8: 117–146
[18] Tasnim, H., Lakhdar, T., Shree, K., 2008. Influence of non-proportional loading on ratcheting responses and simulations by two recent cyclic plasticity models, Int. J. of Plasticity, (24) 1863–1889.
[19] Yahiaoui, K., Moffat, D.G., Moreton, D.N., 1996. Response and cyclic strain accumulation of pressurized piping elbows under dynamic in plane bending, J. of strain analysis vol 31 No 2.
[20] Zakavi, S.J., Zehsaz, M., Eslami, M.R. (2010) The ratchetting behavior of pressurized plain pipework subjected to cyclic bending moment with the combined hardening model. Nuclear Engineering and Design, 240(4), 726-737.
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  • APA Style

    S. J. Zakavi, V. Golshan. (2014). The Effect of Dynamic Bending Moments on the Ratchetting Behavior of Stainless Steel Pressurized Piping Elbows. International Journal of Mechanical Engineering and Applications, 2(2), 31-37. https://doi.org/10.11648/j.ijmea.20140202.12

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    ACS Style

    S. J. Zakavi; V. Golshan. The Effect of Dynamic Bending Moments on the Ratchetting Behavior of Stainless Steel Pressurized Piping Elbows. Int. J. Mech. Eng. Appl. 2014, 2(2), 31-37. doi: 10.11648/j.ijmea.20140202.12

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    AMA Style

    S. J. Zakavi, V. Golshan. The Effect of Dynamic Bending Moments on the Ratchetting Behavior of Stainless Steel Pressurized Piping Elbows. Int J Mech Eng Appl. 2014;2(2):31-37. doi: 10.11648/j.ijmea.20140202.12

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  • @article{10.11648/j.ijmea.20140202.12,
      author = {S. J. Zakavi and V. Golshan},
      title = {The Effect of Dynamic Bending Moments on the Ratchetting Behavior of Stainless Steel Pressurized Piping Elbows},
      journal = {International Journal of Mechanical Engineering and Applications},
      volume = {2},
      number = {2},
      pages = {31-37},
      doi = {10.11648/j.ijmea.20140202.12},
      url = {https://doi.org/10.11648/j.ijmea.20140202.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmea.20140202.12},
      abstract = {In this paper the ratchetting behavior of four pairs of stainless steel, long and short radius welding elbows is studied under conditions of steady internal pressure and in-plane, resonant dynamic moments that simulated seismic excitations. The finite element analysis with the nonlinear kinematic hardening model has been used to evaluate ratchetting behavior of the elbow under mentioned loading condition. Stress–strain data and material parameters have been obtained from several stabilized cycles of specimens that are subjected to symmetric strain cycles. The results show that the maximum ratcheting strain occurred mainly in the hoop direction at flanks. Ratcheting strain rate increases with increase of the bending loading level at the constant internal pressure. The results show that the FE method gives over estimated values comparing with the experimental data.},
     year = {2014}
    }
    

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    T1  - The Effect of Dynamic Bending Moments on the Ratchetting Behavior of Stainless Steel Pressurized Piping Elbows
    AU  - S. J. Zakavi
    AU  - V. Golshan
    Y1  - 2014/05/30
    PY  - 2014
    N1  - https://doi.org/10.11648/j.ijmea.20140202.12
    DO  - 10.11648/j.ijmea.20140202.12
    T2  - International Journal of Mechanical Engineering and Applications
    JF  - International Journal of Mechanical Engineering and Applications
    JO  - International Journal of Mechanical Engineering and Applications
    SP  - 31
    EP  - 37
    PB  - Science Publishing Group
    SN  - 2330-0248
    UR  - https://doi.org/10.11648/j.ijmea.20140202.12
    AB  - In this paper the ratchetting behavior of four pairs of stainless steel, long and short radius welding elbows is studied under conditions of steady internal pressure and in-plane, resonant dynamic moments that simulated seismic excitations. The finite element analysis with the nonlinear kinematic hardening model has been used to evaluate ratchetting behavior of the elbow under mentioned loading condition. Stress–strain data and material parameters have been obtained from several stabilized cycles of specimens that are subjected to symmetric strain cycles. The results show that the maximum ratcheting strain occurred mainly in the hoop direction at flanks. Ratcheting strain rate increases with increase of the bending loading level at the constant internal pressure. The results show that the FE method gives over estimated values comparing with the experimental data.
    VL  - 2
    IS  - 2
    ER  - 

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Author Information
  • Faculty of Mech.Eng, Uni.of Mohaghegh Ardabili, Ardabil, Iran

  • Faculty of Mech.Eng, Uni.of Mohaghegh Ardabili, Ardabil, Iran

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