Predicting remaining life in upper sugar-mill shafts

• Main Authors: Sara Rodríguez Pulecio, John Jairo Coronado Marín, Nelson Arzola de la Peña
• Format: Article
• Language: English
• Published: Universidad Nacional de Colombia 2006-01-01
• Series: Ingeniería e Investigación
• Subjects: fracture mechanics; shaft; lournal; fracture toughness; crack
• Online Access: https://revistas.unal.edu.co/index.php/ingeinv/article/view/14686

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.