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Sifs for radial cracks in annular discs under internal and external shrinkage pressure and constant angular velocity

Sakhaee Pour, A ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. DOI: 10.1115/IMECE2007-42861
  3. Publisher: American Society of Mechanical Engineers (ASME) , 2007
  4. Abstract:
  5. Finite element method has been implemented to predict stress intensity factors (SIFs) for radial cracks in annular discs under constant angular velocity. Effects of internal and external uniform pressure on the SIFs have also been considered. Linear elastic fracture mechanics finite element analyses have been performed and results are presented in the form of crack configuration factors for a wide range of components and crack geometry parameters. These parameters are chosen to be representative of typical practical situations. The extensive range of crack configuration factors obtained from the analyses is then used to develop equivalent prediction equations via a statistical multiple non-linear regression model. The accuracy of this model is measured using a multiple coefficient of determination, R2, where 0 ≤ R2 ≤ 1. This coefficient is found to be greater than or equal to 0.98 for all cases considered in this study, demonstrating the quality of the model fit to the data. These equations for the SIFs enable designers to predict fatigue life of the components easily. Copyright © 2007 by ASME
  6. Keywords:
  7. Brittle fracture ; Factor analysis ; Fatigue of materials ; Forecasting ; Fracture mechanics ; Linear regression ; Regression analysis ; Stress intensity factors ; Angular velocity ; Cracks ; Geometry ; Parameter estimation ; Coefficient of determination ; Constant angular velocity ; Crack configuration ; Crack geometries ; Linear elastic fracture mechanics ; Multiple non linear regressions ; Prediction equations ; Uniform pressure ; Crack configuration factors ; Finite element method
  8. Source: ASME 2007 International Mechanical Engineering Congress and Exposition, IMECE 2007, 11 November 2007 through 15 November 2007 ; Volume 7 , 2007 , Pages 653-659 ; 0791843017 (ISBN)
  9. URL: https://asmedigitalcollection.asme.org/IMECE/proceedings-abstract/IMECE2007/43017/653/325510