Damage Detection based on the Natural Frequency shifting of a clamped rectangular plate model

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 b...

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Bibliographic Details
Published in:Journal of physics. Conference series 2015-07, Vol.628 (1), p.12034
Main Authors: Hilmy, Irfan, Wahab, M M Abdel, Adesta, Erry Yullian T, Firdaus, Tasnim
Format: Article
Language:English
Subjects:
Catastrophic failure analysis
Clamping
Curve fitting
Damage detection
Failure analysis
Failure detection
Finite element method
Frequency analysis
Mathematical models
Modulus of elasticity
Nondestructive testing
Physics
Rectangular plates
Resonant frequencies
Vibration analysis
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Summary: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.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/628/1/012034