Structural Engineering and Mechanics

  • 제47권1호
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  • Pages.131-147
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  • 2013
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Constraint-based fracture mechanics analysis of cylinders with internal circumferential cracks

  • Bach, Michael (Department of Mechanical and Aerospace Engineering, Carleton University) ;
  • Wang, Xin (Department of Mechanical and Aerospace Engineering, Carleton University)
  • 투고 : 2012.06.02
  • 심사 : 2013.07.03
  • 발행 : 2013.07.10
⟨ 이전 논문 다음 논문 ⟩

초록

In this paper, constraint-based fracture mechanics analyses of hollow cylinders with internal circumferential crack under tensile loading are conducted. Finite element analyses of the cracked cylinders are carried out to determine the fracture parameters including elastic T-stresses, and fully-plastic J-integrals. Linear elastic finite element analysis is conducted to obtain the T-stresses, and elastic-plastic analysis is conducted to obtain the fully plastic J-integrals. A wide range of cylinder geometries are studied, with cylinder radius ratios of $r_i/r_o$ = 0.2 to 0.8 and crack depth ratio a/t = 0.2 to 0.8. Fully plastic J-integrals are obtained for Ramberg-Osgood power law hardening material of n = 3, 5 and 10. These fracture parameters are then used to construct conventional and constraint-based failure assessment diagrams (FADs) to determine the maximum load carrying capacity of cracked cylinders. It is demonstrated that these tensile loaded cylinders with circumferential cracks are under low constraint conditions, and the load carrying capacity are higher when the low constraint effects are properly accounted for, using constraint-based FADs, comparing to the predictions from the conventional FADs.

키워드

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피인용 문헌

  1. A modified hybrid method to estimate fracture resistance curve for pipes with a circumferential surface crack 2018, https://doi.org/10.1016/j.engfracmech.2017.05.046
  2. Modeling and optimization of a cracked pipeline under pressure by an interactive method: design of experiments 2017, https://doi.org/10.1007/s12008-017-0385-0
  3. Probabilistic Fracture Mechanics for Analysis of Longitudinal Cracks in Pipes Under Internal Pressure vol.18, pp.6, 2018, https://doi.org/10.1007/s11668-018-0564-8
  4. Failure Analyses of Propagation of Cracks in Repaired Pipe Under Internal Pressure vol.19, pp.1, 2019, https://doi.org/10.1007/s11668-019-00592-3