Characterization of Water Absorption by CFRP Using Air-Coupled Ultrasonic Testing

Air-coupled Ultrasonic Testing of Materials

NDE Applications of Air-Coupled Ultrasonic Transducers

Abslract In recent years, several new NDE applications of air-coupled, as opposed to liquid-coupled, ultrasonics have been seriously pursued. The applications range from throughtransmission testing of aerospace laminates and various honeycomb or foam filled materials, and solar cells, to pulseecho flaw detection in plastic electronic packaging materials and in-line inspection of large-diameter ...

Air-Coupled Nondestructive Evaluation Using Micromachined Ultrasonic Transducers

Nondestructive evaluation techniques Amlrurn , which use conventional piezoelectric transducers tvDicallv reauire liquid coupling fluids to improve " _ . the impedance mismatch between piezoelectric materials and air. Air-coupled ultrasonic systems can eliminate this requirement if the dynamic range of the system is large enough such that the losses a t the air-solid interfaces are tolerable. C...

Anisotropic Materials Characterization Using Air-coupled Ultrasound

Ultrasonic materials characterization is widely used to assess both properties and defects of structural components. Recently, the option of gasor air-coupled ultrasonic testing has become a realistic possibility. In this paper we develop the application of resonant sound transmission methods through ambient air in anisotropic materials with the sound wavevector oriented in a general direction ...

Ultrasonic Testing Machines with Robot Mechanics - A New Approach to CFRP Component Testing

For a long time, Ultrasonic Testing Machines for aircraft components have been built with almost 100% custom made mechanics (gantry or bridge design) to match customer needs. This design comes with several disadvantages like price, delivery time or lack of flexibility. This article illustrates an alternative approach to Testing Machine design for the Aerospace industry and describes in detail t...