On Reduction of Stress Concentration around the Pin Hole in Turbine Discs

Abstract:

The stress concentration phenomenon around holes in rotated components is discussed. Firstly, finite element analysis of a simplified model of turbine disc flange is carried out, and then a method is developed by designing an intended-cut notch on the model to reduce the stress around the pin hole. Furthermore, two characteristic parameters which determine the configuration of the notch, namely notch depth and arc length parameter, are investigated by changing the notch dimensions. The results show that this method can reduce the stress around the hole significantly, notch depth and arc length have an important impact on the stress concentration factor (SCF), the SCF decreases with the increase of notch depth, and increasing the arc length within a critical scope results in the decrease of the SCF.

• Periodical: Applied Mechanics and Materials (Volume 482)
• Pages: 55-58
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.482.55
• Online since: December 2013
• Authors: Liang Shi*, Yan Rong Wang, Shan Hu Yuan, Da Sheng Wei
• Keywords: Finite Element, Notch, Pin Hole, Stress Concentration, Turbine Disc

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