Ab Wahab, Nazirah and Andan, Amelda Dianne and Md Yusof, Nurhalawa and Chindada, Sony (2026) Numerical simulation of pulse laser-generated ultrasonic wave and amplitude peak count for defect detection. Jurnal Kejuruteraan, 38 (2). pp. 877-886. ISSN 0128-0198 E-ISSN 2289-7526
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Abstract
High spatial resolution and the possibility for distant and noncontact measurements have led to substantial research into laser ultrasonic techniques. Pulse lasers produce heat when the surface of a target object absorbs its electromagnetic energy. When a material undergoes a temperature shift, it generates stress and strain fields, which in turn cause an elastic wave known as ultrasound. This research simulated the effects of an ultrasonic wave produced by a laser striking an aluminium plate. Using extremely fine meshes, the pulse laser stimulation is modelled as a localised heat flux imposed to the structure’s surface. The 2D simulation data for intact specimen is collected and then compared to an existing experimental data using contactless laser ultrasonic measuring equipment. The model is then subjected to surface damage and identified using a threshold to retrieve the peak count from the laser ultrasonic data while analysing the correlation between damage effects found in various locations and peak counts. The total number of peak counts is measured, and the damage is successfully detected. Based on the identified peak counts, different damage locations can be determined and analysed.
| Item Type: | Article (Journal) |
|---|---|
| Uncontrolled Keywords: | Laser ultrasonics; finite element method; damage localization; peak count |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA365 Acoustics in engineering. Acoustical engineering |
| Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): | Kulliyyah of Engineering > Department of Mechanical Engineering Kulliyyah of Engineering |
| Depositing User: | Dr. Amelda Dianne Andan |
| Date Deposited: | 31 Jul 2026 11:09 |
| Last Update: | 31 Jul 2026 11:09 |
| Queue Number: | 2026-07-Q4375 |
| URI: | http://irep.iium.edu.my/id/eprint/130343 |
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