This research focuses on the application of an acousto-ultrasonics (AU) technique, a combination ultrasonic characterization and acoustic emission, to nondestructively detect defects such as voids in bonded metal/composite assemblies. Computational methods are established examine effects collected signal. The position receiver sensor with respect defect is also investigated. Given specific stru...

Nearly all manufactured products in the metal industry involve welding. The detection and correction of defects during welding improve the product reliability and quality, and prevent unexpected failures. Nonintrusive process control is critical for avoiding these defects. This paper investigates the detection of burn-through damage using noncontact, air-coupled ultrasonics, which can be adapte...

We applied the laser ultrasonic technique for detecting surface breaking slots in steel cylinders (25 mm in diameter). The observation of the detected signal over a long time (500 micros), shows that the interaction of the two contra-propagating incident Rayleigh waves reinforce the echoes coming from the defect. These echoes are slowly growing with time whereas the main signals decrease. This ...

In recent years the use of carbon fiber reinforced plastics (CFRP) in manufacturing of aircraft and auto cars has increased continually. These materials are of interest because of their excellent mechanical properties like high strength and stiffness at low weight. In consequence of the development of new production processes machine-made CFRP components became more complex in design and shape....