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Non-Destructive testing based method for crack detection in beams

In this paper, efforts are made to develop suitable methods that can serve as the basis to detect crack location and to crack size from measured axial vibration data. This method is used to address the inverse problem of assessing the crack location and crack size in various beam structure. | Nội dung Text Non-Destructive testing based method for crack detection in beams Engineering Solid Mechanics 2 2014 193-200 Contents lists available at GrowingScience Engineering Solid Mechanics homepage www.GrowingScience.com esm Non-Destructive testing based method for crack detection in beams Akash Vardhana and Amanpreet Singhb a Department of Production Engineering Jadavpur University Kolkata India b Department of Mechanical Engineering Indian School of Mines Dhanbad India ARTICLE INFO ABSTRACT Article history Beams are the constituent elements of several machine parts and sophisticated Received January 20 2014 Received in Revised form structures. In this paper efforts are made to develop suitable methods that can serve April 10 2014 as the basis to detect crack location and to crack size from measured axial vibration Accepted 15 April 2014 data. This method is used to address the inverse problem of assessing the crack Available online location and crack size in various beam structure. The method is based on 17 April 2014 measurement of axial natural frequencies which are global parameter and can be Keywords Non-destructive testing easily measured from any point on the structure. In theoretical analysis the Modal frequencies relationship between the natural frequencies crack location and crack size has been Stiffness developed. For identification of crack location and crack size it was shown that data Crack location on the variation of the first two natural frequencies is sufficient. The experimental Crack size Axial vibration analysis is done to verify the practical applicability of the theoretical method developed. 2014 Growing Science Ltd. All rights reserved. 1. Introduction Mostly modal frequencies are used for monitoring the crack because modal frequencies are properties of the whole component. The natural frequency of the component decreases as a result of crack. Many methods have been developed to detect and locate the crack by measuring the change in .