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Reliability assessment of cracked pipes subjected to creep-fatigue loading

Vojdani, A ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1016/j.tafmec.2019.102333
  3. Publisher: Elsevier B.V , 2019
  4. Abstract:
  5. The reliability analysis of defective pipes, which operate under creep-fatigue loading conditions has been studied. An austenitic stainless steel pipe containing an axially external semi-elliptical surface crack, subjected to variable internal pressure at elevated temperature has been considered as the benchmark problem. Different parameters in material behavior, geometry parameters, and operational condition have been assumed as random variables in the probabilistic assessments. The reliability of the cracked pipes have been evaluated at various operation times, using different reliability methods. Sensitivity analyses have been conducted to investigate the importance measure of the random variables involved in the problem. Moreover, the effects of reducing the scattering of the random variables on the variations of the reliability index, β, has been examined. © 2019 Elsevier Ltd
  6. Keywords:
  7. Crack growth ; Creep-fatigue ; Crack propagation ; Cracks ; Creep ; Random variables ; Reliability ; Sensitivity analysis ; Thermal fatigue ; Creep fatigue ; Creep-fatigue loading ; Deterministic assessment ; Operational conditions ; Probabilistic analysis ; Probabilistic assessments ; Reliability assessments ; Semi-elliptical surface cracks ; Reliability analysis
  8. Source: Theoretical and Applied Fracture Mechanics ; Volume 104 , 2019 ; 01678442 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S016784421930151X