Ultrasonic Guided Waves Focusing beyond Defects in Hollow Cylinders

Li Zhang
Penn State University, USA

Abaqus/Explicit was used to simulate 100khz ultrasonic torsional wave focusing in carbon steel pipelines beyond various defects. Time delays and amplitude factors were employed to control the energy to focus at pre-determined focal positions. FBS, Inc. And the ultrasonic R&D laboratory of the Penn State University first developed guided wave focusing techniques for pipelines. FBS, Inc. and the ultrasonic R&D laboratory at Penn State University have become the preeminent experts in this technology. The focusing results simulated by Abaqus have been validated through experiments.