Mohamad Zainal Abidin, Syarafana (2017) Effect Of High Frequency Input Location For Crack Detection In Nonlinear Vibro-Acoustic Method. Project Report. UTeM, Melaka, Malaysia. (Submitted)
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Effect Of High Frequency Input Location For Crack Detection In Nonlinear Vibro-Acoustic Method.pdf - Submitted Version Download (483kB) |
Abstract
Fatigue crack can occur due to the material failure to withstand when load is applied repeatedly. There are a few phases in fatigue life of crack; starting from crack initiation, crack growth and rapid fracture. Basically, from the crack motion, three type of crack modes are formed. Mode I is an opening mode. Mode II is mode of sliding. Mode III is mode of tearing. Even though, crack usually seen in smaller size. But, the growth of it can cause major failure of a structure. Therefore, it is essential to perform inspection in detail. Many methods can be used to detect a crack structure. This involve method of laser vibrometer, eddy current and acoustic emission. In this project, vibro-acoustic method is used for crack detection. Therefore, several step needed to be performed. This includes the process of test specimen preparation, modal analysis test and finally vibro-acoustic wave. Generally, the test specimen preparation involve process of material preparation, tensile test, and dynamic fatigue test. This process essential in way to create the crack on the aluminium plate. Next, the plate will be tested on modal analysis to identify the resonant frequencies of the structure. The resonant frequencies will later be used as the excitation of low frequency in the vibro-acoustic test. As for the acoustic signal, 60 kHz will be used in that test. This vibro-acoustic test is chosen to achieve the main objective of the research; to find the effect of high frequency excitation position in crack detection. The output signal formed is then will be transformed in frequency domain using MATLAB software. Finally, the analysed data result in this research proved that the position of high frequency input does not mainly effect the crack detection process.
| Item Type: | Final Year Project (Project Report) |
|---|---|
| Uncontrolled Keywords: | Acoustic emission testing, Structural analysis (Engineering), Modal analysis |
| Subjects: | T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Library > Final Year Project > FKM |
| Depositing User: | Mohd Hannif Jamaludin |
| Date Deposited: | 31 Dec 2018 08:41 |
| Last Modified: | 31 Dec 2018 08:41 |
| URI: | http://digitalcollection.utem.edu.my/id/eprint/22537 |
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