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Journal of Mechanical Science and Technology

, Volume 31, Issue 4, pp 1603–1610 | Cite as

Crack growth pattern prediction in a thin walled cylinder based on closed form thermo-elastic stress intensity factors

  • Mohammad Abbaspour Niasani
  • Rahmatollah Ghajar
  • Hamed Saeidi Googarchin
  • Seyed Mohammad Hossein Sharifi
Article

Abstract

Circumferential crack growth pattern in a thin-walled cylinder is studied. Thermo-elastic stresses in a cylinder subjected to thermomechanical loads are extracted. Closed form thermo-elastic stress intensity factor for cracked cylinder are derived using weight function method. An algorithm is developed to simulate different crack growth patterns utilizing a very high efficiency weight function method. This would lessen the taken time for the analyses compared to other numerical methods such as FEM. Results show that while the load effect on cylinder subjected to thermal load lead to the crack growth in small aspect ratio, in cylinder subjected to mechanical loads, it would lead to the growth of crack in large aspect ratio. The results show that, apart from load effects, the cylinders containing initial semi-circular crack have the longest life among the cylinders containing initial semi-elliptical crack with the same initial depth.

Keywords

Cylinder Crack growth pattern Weight function Stress intensity factor 

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Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Mohammad Abbaspour Niasani
    • 1
  • Rahmatollah Ghajar
    • 1
  • Hamed Saeidi Googarchin
    • 2
    • 3
  • Seyed Mohammad Hossein Sharifi
    • 4
  1. 1.Department of Mechanical EngineeringK.N. Toosi University of TechnologyTehranIran
  2. 2.School of Automotive EngineeringIran University of Science and TechnologyTehranIran
  3. 3.Automotive Fluids and Structures Analysis Research LaboratoryIran University of Science and TechnologyTehranIran
  4. 4.Faculty of Marine SciencesPetroleum University of TechnologyMazandaranIran

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