DYMAT 2009
Volume 2, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 1737 - 1743
Section Numerical Simulations
Published online 15 September 2009
DYMAT 2009 (2009) 1737-1743
DOI: 10.1051/dymat/2009245

Numerical simulation of wave propagation in cracked shafts

L. Rubio, B. Muñoz-Abella and G. Loaiza

Department of Mechanical Engineering, University Carlos III of Madrid, Avda. de la Universidad 30, 28911 Madrid, Spain

Published online: 15 September 2009

The presence of crack-like defects in mechanical and structural elements produces failures during their service life that in some cases can be catastrophic. The increasingly importance of problems related with safety and costs derived from these catastrophic failures, have pushed the researchers in the field of damage detection, to look for and develop methods for the detection and identification of defects. The presence of cracks in rotating mechanical elements, such as shafts, is especially dangerous due to the fatigue effect generated by the work in bending and torsion together with the motion in rotation. In this work, the wave propagation in a cracked shaft due to an initial compression dynamic load has been numerically analyzed as the first step to establish a non-destructive method for the detection and identification of cracks using a dynamic test. Cracks with increasingly depths have been considered and studied. The same model has been submitted to an initial velocity. The results obtained in this work would allow the development of an on-line method for damage detection and identification for cracked mechanical elements using an easy and portable dynamic testing device.

© EDP Sciences 2009