Damage-reliability approach for fatigue crack propagation in MDPE gas pipe

• Autorzy: Berkas Khaoula , Chaoui Kamel

Identyfikatory

DOI

10.59441/ijame/172897

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

MDPE gas pipe; fatigue crack propagation; damage zone; limit state function; reliability index

PL

rura gazowa; pęknięcie zmęczeniowe; wskaźnik niezawodności

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2023
• Tom: Vol. 28, no. 3
• Strony: 42--52
• Opis fizyczny: Bibliogr. 18 poz., fot., rys., tab., wykr.

Twórcy

autor

Berkas Khaoula

• Mechanics of Materials & Plant Maintenance Research Laboratory (LR3MI), Mechanical Engineering Department, Faculty of Technology, Badji Mokhtar University, PO Box 12, Sidi Amar 23052, Annaba, ALGERIA

autor

Chaoui Kamel

• Mechanics of Materials & Plant Maintenance Research Laboratory (LR3MI), Mechanical Engineering Department, Faculty of Technology, Badji Mokhtar University, PO Box 12, Sidi Amar 23052, Annaba, ALGERIA

Bibliografia

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