PROBABILISTIC LIFE ESTIMATION OF TURBINE SHAFT BOLTED JOINTS CONSIDERING THE EFFECT OF NONLINEAR STRESS GRADIENTS ON CRACK GROWTH RATES

Özge Tümergin, Şevket Ertekin, Aliyye Kara, Ayşe Su Giz, Emel Kula Topak, Umud Esat Ozturk, Ata Muğan

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Özet

Crack growth in mechanical components is determined by initial crack size and fracture toughness that have probabilistic distributions. With a focus on a turbine shaft bolted joint made of Inconel 718, fracture damage was examined during a test cycle while crack size and fracture toughness were random variables. A finite element model of a turbine was created to calculate the stress field in turbine components. Following, stress distribution around the potential crack zones was included in calculating the crack growth. Proposed approach was verified by making comparisons with the results of Nasgro. Probabilistic distribution of crack depth and length, expected life and probability of detecting a crack was included in crack growth analyses. Probability of failure of the stub shaft was calculated via Monte-Carlo simulations. Comparisons were made with the crack growth results of Nasgro to verify the developed methodology. Effect of inspection period on probability of detecting the cracks before failure was determined.

Orijinal dilİngilizce
Ana bilgisayar yayını başlığıStructures and Dynamics - Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration
YayınlayanAmerican Society of Mechanical Engineers (ASME)
ISBN (Elektronik)9780791887066
DOI'lar
Yayın durumuYayınlandı - 2023
EtkinlikASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, GT 2023 - Boston, United States
Süre: 26 Haz 202330 Haz 2023

Yayın serisi

AdıProceedings of the ASME Turbo Expo
Hacim11B

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???event.eventtypes.event.conference???ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, GT 2023
Ülke/BölgeUnited States
ŞehirBoston
Periyot26/06/2330/06/23

Bibliyografik not

Publisher Copyright:
Copyright © 2023 by ASME.

Finansman

The technical support supplied by TUSAŞ Engine Industries, Inc. (TEI) is gratefully acknowledged.

FinansörlerFinansör numarası
TEI
TUSAŞ

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