Non-destructive testing (NDT) is an important technique used in the aviation industry to ensure that aircraft are safe and reliable for use. NDT testing on aircraft is a technique used to evaluate the properties of aircraft without causing any damage to the structure. In this article, we will discuss what NDT testing on aircraft is and its various methods.
What is NDT testing on aircraft?
NDT testing on aircraft is a technique used to evaluate the properties of aircraft without causing any damage to the structure. This technique is used to detect any defects, cracks, or voids present in the aircraft structure. NDT testing on aircraft is essential to ensure the structural integrity of aircraft and to identify any potential problems that could lead to a failure of the structure.
Various methods of NDT testing on aircraft:
Ultrasonic Testing (UT):
Ultrasonic Testing is a non-destructive testing technique that uses high-frequency sound waves to evaluate the properties of materials. This technique involves sending sound waves into the aircraft structure and measuring the time it takes for the waves to bounce back. UT can be used to measure the thickness of the aircraft skin, detect any cracks or voids, and evaluate the quality of the material used in the structure.
Eddy Current Testing (ECT):
Eddy Current Testing is a non-destructive testing technique that uses electromagnetic fields to evaluate the properties of the aircraft structure. This technique involves sending an electrical current through a coil and then measuring the changes in the magnetic field as it passes over the aircraft structure. ECT can be used to detect any cracks, voids, or corrosion in the structure.
Magnetic Particle Testing (MPT):
Magnetic Particle Testing is a non-destructive testing technique that uses magnetic fields to detect any surface or subsurface defects in the aircraft structure. This technique involves applying a magnetic field to the aircraft structure and then applying magnetic particles to the surface. The magnetic particles will accumulate at any defects or cracks in the structure, making them visible to the inspector.
Radiography Testing:
Radiography Testing is a non-destructive testing technique that uses X-rays or gamma rays to evaluate the properties of the aircraft structure. This technique involves sending X-rays or gamma rays through the aircraft structure and then measuring the amount of radiation that passes through the structure. Radiography Testing can be used to detect any cracks, voids, or corrosion in the structure.
Visual Inspection:
Visual inspection is a non-destructive testing technique that involves inspecting the aircraft structure for any visible defects, cracks, or corrosion. This technique is simple and easy to perform and can be used to detect any surface defects in the aircraft structure. However, a visual inspection cannot be used to evaluate the internal properties of the structure.
Eddy Current Array (ECA):
Eddy Current Array is a non-destructive testing technique that uses multiple coils to generate a magnetic field to evaluate the properties of the aircraft structure. This technique is similar to ECT but is more advanced and can detect defects in a larger area of the structure.
Acoustic Emission Testing:
Acoustic Emission Testing is a non-destructive testing technique that uses sensors to detect any acoustic emissions or sounds produced by the aircraft structure. This technique can be used to detect any cracks or defects in the structure that produce acoustic emissions.
Conclusion:
NDT testing on aircraft is an essential technique used in the aviation industry to ensure that aircraft are safe and reliable for use. It helps to detect any defects, cracks, or voids present in the aircraft structure and provides information about its quality, strength, and durability. The various methods of NDT testing on aircraft include ultrasonic testing, eddy current testing, magnetic particle testing, radiography testing, visual inspection, and eddy current array. Each of these techniques has its advantages and limitations and is used depending on the specific requirements of the aircraft. NDT testing on aircraft is critical to maintaining the safety and integrity of aircraft, and regular inspections are essential to prevent any accidents or failures due to structural issues.
