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Prediction of the Sugar Mill Shaft Failure Using a Fracture Mechanics Method

[+] Author Affiliations
Nelson Arzola, Ariel Fernandez, Ramon Perez, Rafael Goytisolo

University of Cienfuegos

Paper No. IMECE2005-80418, pp. 749-755; 7 pages
doi:10.1115/IMECE2005-80418
From:
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Design Engineering, Parts A and B
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Design Engineering Division
  • ISBN: 0-7918-4215-0 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME

abstract

This paper presents a new analysis scheme and the procedure used to calculate the internal forces and the stresses in the sugar cane mill shafts. One of the contributions of this research is to consider the top roller as a beam on elastic foundation. The reaction of the bagasse layer on the top roller was determined considering it as a beam on elastic foundation. A fracture mechanics based method is presented for determining the residual life of large sugar mill shafts with semi elliptical cracks. Due to the multi axial stress field, an equivalent strain energy release rate stress intensity solution is used in the Paris law to predict crack growth. Ultrasonic inspection intervals for the shafts are established. The crack zone evaluated is located in the shoulder of the bearing nearest to the square box coupling where about 85% of the service failure these types of shafts are observed [1, 2, 3].

Copyright © 2005 by ASME

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