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Ingeniería e Investigación

Print version ISSN 0120-5609

Abstract

RODRIGUEZ PULECIO, Sara; CORONADO MARIN, John Jairo  and  ARZOLA DE LA PENA, Nelson. Predicting remaining life in upper sugar-mill shafts. Ing. Investig. [online]. 2006, vol.26, n.1, pp.78-85. ISSN 0120-5609.

A fracture mechanics-based method is presented for determining critical crack size and residual life of upper sugar-mill shafts having semi-elliptical and circumferential cracks. Due to the multiaxial stress field, an equivalent strain energy release rate stress intensity solution is used in Paris’ law to predict crack growth. Ultrasonic inspection intervals for the shaft were established. The crack zone evaluated was located in the shoulder of the bearing nearest to the square box coupling where about 25% of service failures in these types of shaft are observed.

Keywords : fracture mechanics; shaft; journal; fracture toughness; crack.

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