Fatigue crack propagation tests are carried out on arc-shaped specimens prepared from MDPE gas pipes. Damage zone characterization is achieved using the diamond wafer sectioning technique from partially propagated and prematurely arrested cracks. Damage ahead of the crack-tip is used to assess a damage parameter and reliability based on statistical laws and subsequent use the PHIMECA Software. ; It is shown that a length and a width associated with a corresponding change in thickness at the fracture surface satisfactorily describe the damage zone size. The 3-parameter Weibull model gives the best reliability behavior and a critical lifetime of 82%. When considering separately both the Dugdale model and experimental damage zone measurements, it is possible to establish the evolution of the reliability index as a function of crack length. It is concluded that the reliability index approach based on damage provides a more consistent representation compared to analytical models.
Zielona Góra: Uniwersytet Zielonogórski
IJAME, volume 28, number 3 (2023)
Biblioteka Uniwersytetu Zielonogórskiego
Oct 30, 2023
Oct 30, 2023
71
https://zbc.uz.zgora.pl/publication/84356
Edition name | Date |
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Damage-reliability approach for fatigue crack propagation in MDPE gas pipe | Oct 30, 2023 |
Khrouf, F. Tebassi, Hamid Yallese, M.A. Chaoui, Kamel Haddad, A. Jurczak, Paweł - red.
Nguyen, Huu Anh Tuan Kuczyński, Tadeusz - red.
Kaliszuk, Joanna Greinert, Andrzej - red.