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Damage detection based on the natural frequency shifting of a clamped rectangular plate model

Hilmy, Irfan and Wahab, M. Abdel and Adesta, Erry Yulian Triblas and Mohamed Ariff, Tasnim Firdaus (2015) Damage detection based on the natural frequency shifting of a clamped rectangular plate model. Journal of Physics: Conference Series, 628. 012034-1. ISSN 1742-6588 (P), 1742-6596 (O)

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Damage detection of any structure becomes the main concern in a failure analysis. Early failure detection is very important as it can prevent any catastrophic failure by replacing or repairing the damage part at early stage. One of the non-destructive methods of damage detection is using frequency based vibration analysis. Identification and comparison of a set of natural frequencies before and after damage is the main concern of this research. A rectangular plate clamped at all edges represented an initial undamaged structure. Based on Kachanov’s definition, damage existence in a structure is introduced in the presence of some circular voids. The voids are generated randomly at different level of damage value. To obtain the Natural Frequencies, a Finite Element Model (FEM) of a clamped plate with the updated value of Young’s Modulus is analyzed. From the FEM analysis result, it is found that the Natural Frequencies are shifted as the void existence increase. Using curve fitting, the model of Natural Frequency shifting as a function of damage evolution has been generated. It is found that the shifting of the Natural Frequency is greater at higher frequency value as indicated by the higher absolute gradient.

Item Type: Article (Journal)
Additional Information: 6670/46312
Uncontrolled Keywords: Catastrophic failures; Clamped rectangular plate; Damage evolution; Early failure detection; Frequency-shifting; Higher frequencies; Nondestructive methods; Rectangular plates
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User: Dr Irfan Hilmy
Date Deposited: 22 Dec 2015 10:11
Last Modified: 21 Sep 2017 16:03
URI: http://irep.iium.edu.my/id/eprint/46312

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