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RESEARCH PAPERS: Gas Turbines: Structures and Dynamics

Crack Identification in a Cantilever Beam Using Coupled Response Measurements

[+] Author and Article Information
A. S. Sekhar, P. Balaji Prasad

Indian Institute of Technology, Department of Mechanical Engineering, Kharagpur, 721 302, India

J. Eng. Gas Turbines Power 120(4), 775-777 (Oct 01, 1998) (3 pages) doi:10.1115/1.2818466 History: Received June 19, 1997; Online November 19, 2007

Abstract

Identification of crack location and magnitude through measurement in changes in system characteristics, such as modal measurements, has been studied by various researchers. In the present work based on the new method proposed by Gounaris et al. (1996) for crack detection through coupled response measurements, experiments were carried out on a cracked cantilever beam for eigenfrequencies, bending, and axial response measurements. It has been observed that the rate of change of direct response (bending) is much less at small cracks, while that of the coupled response (axial) changes substantially, which allows for diagnoses of smaller cracks.

Copyright © 1998 by The American Society of Mechanical Engineers
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