Ultrasonic NDE Techniques for Impact Damage Inspection on CFRP Laminates
نویسنده
چکیده
This study investigates the different types of ultrasonic inspection, when applied to assess the impact damage in Carbon Fiber Reinforced Plastic CFRP laminates. The study surveys the two most used ultrasonic testing approaches first; namely the pulse-echo and the through-transmission modes. Then, the manuscript discusses and analyzes the enhanced ultrasonic testing methods that use the polar scattering, the thickness independent techniques, air-coupled, and the techniques based on the Ultrasonic Rayleigh and Lamb Waves. Additionally, presented study demonstrates some of these techniques to test a CFRP sample with embedded defects, along with the processing required for the acquired results such as the wavelet transformation.
منابع مشابه
NDE Studies on Spacecraft Structural Components Using Aircoupled Ultrasonic and Thermography Techniques
The two Non-Destructive Evaluation [ NDE ] techniques viz., Air Coupled Ultrasonic [ACU ] and Pulsed Thermography [PT ] find many applications in aerospace industry . These NDE techniques can be used for debond detection in spacecraft structural components like honeycomb sandwich deck plates, shear web panels and central cylinder made of aluminum core and composite face sheets. The Air coupled ...
متن کاملLocal Guided Wavefield Analysis for Characterization of Delaminations in Composites
Delaminations in composite laminates resulting from impact events may be accompanied by minimal indication of damage at the surface. As such, inspection techniques are required to ensure defects are within allowable limits. Conventional ultrasonic scanning techniques have been shown to effectively characterize the size and depth of delaminations but require physical contact with the structure. ...
متن کاملEcho Detection Techniques for Ultrasonic Imaging of Damage in Composite Laminates
Advanced composites, particularly high modulus laminates, are often susceptible to transverse impact loading. Major damage introduced due to low velocity impact include matrix cracking, fiber break and delaminations. Such flaws tend to reduce residual strength of the material and may cause catastrophic failure when the material is subjected to higher operating loads [1,2]. Unfortunately, these ...
متن کاملImpact Damage Detection of Toughened CFRP Laminates with Time Domain
Laminated Carbon Fiber Reinforced Polymer (CFRP) composites are very effective in weight saving in aeronautical structural components. For these laminated CFRP structures, it is, however, difficult to detect damage such as delamination, matrix cracks, and local fiber breakages caused by low velocity impact loading In the previous study in 2009, Time Domain Reflectometry (TDR) method was applied...
متن کاملUltrasonic nondestructive inspection of solid objects
Ultrasonic testing (UT) has been used for nondestructive evaluation (NDE) of materials for more than half a century. A number of NDE techniques have been developed and specifi standards have been created for the UT applications in different areas of engineering. UT has two main goals related to inspection of solid objects, firstl , detection and characterization of material discontinuities (fl ...
متن کامل