Lamb wave tests are an adequate method for analyzing light-weight structures like carbon fiber-reinforced plastic (CFRP) used for the aviation industry. When it comes to fiber-reinforced composites, it is extremely important that damage such as delamination or cracks are detected and localized in good time – both in production and during operation. “Lamb waves” – surface waves that propagate on thin plate structures – play a major role in non-destructive materials testing, since they interact with different types of material faults, which makes damages visible.
PSV Polytec Scanning Vibrometers are ideal for designing component-integrated sensor networks, which are increasingly being used in critical structural elements, including aircraft, so as to continually monitor them during operation (structural health monitoring). These full-field scanning vibration sensors have become the number one development tools for adapted materials testing methods. The non-contact systems visualize the temporal propagation of Lamb waves with a high spatial resolution. The entire 3D vibration vector is recorded for each scan point, so that the typical S and A waves are broken up during the analysis. Laser vibrometers are thus indispensable for you as tools for researching Lamb waves and developing methods that are suitable for industrial purposes.
Integrated sensor networks should simplify structural health monitoring of modern aircraft structures and actively indicate incipient damage. The quantitative and temporal propagation of test signals in the component can easily be checked and visualized with laser Doppler scanning vibrometers, allowing for reliable calibration of experimental sensor networks and proving dependability.