Detection and sizing of surface-breaking cracks by focalised surface waves : Experimental results and theoretical modelling
Surface waves generated by a focalised ultrasonic beam are very useful for detecting and sizing small surface-breaking cracks. The paper describes a model that can be used to calculate the normalised amplitude of the echo as a function of the position of the probe (i.e. the echo-dynamics curve). A wire is used as reference reflector. The experimental verification of the model is discussed. The model will be used as a tool to design ultrasonic probes, in order to optimise detection and sizing of surface-breaking cracks. Other possible applications of the model are also given.
Bibliographic Reference: Paper presented: Les Progrès dans les Méthodes d'Investigation des Métaux, Nov. 20-21, 1991
Availability: Available from (1) as Paper EN 36495 ORA
Record Number: 199111603 / Last updated on: 1994-12-02
Original language: en
Available languages: en