Low-velocity impact in carbon fibre reinforced polymer (CFRP) is known as a major reason for failure in aerospace structures. To evaluate defects in CFRPs, nondestructive testing (NDT) is used. The objective of the thesis is to compare the features and abilities of different NDT methods to reveal and size impact damages in CFRP panels. To assess the damages, ultrasonic testing, thermography, and shearography are conducted. These methods are applied to evaluate damages for different impact levels on composite laminates. The size of the damages is measured using ultrasonic testing. Based on the ultrasound measurements, the defect quantifying abilities of thermography and shearography are investigated. The tests show that infrared thermography and shearography are able to quantify the damages. In the experiments, shearography presents a qualitative correlation between fringe density and level of impact energy. Besides the experimental testing, finite element simulation is used. The simulation can evaluate the methods’ detecting performances through the virtual test.
| Date | 23 Jun 2020 |
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| Original language | American English |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | Martin Viens (Supervisor) & Hakim Bendada (Co-supervisor) |
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Khademi Far, A. (Author),
Viens (Supervisor) & Bendada (Co-supervisor),
23 Jun 2020Student thesis: Master's thesis › Master in Engineering: Mechanical Engineering