Acoustic Resonance Testing (ART) is a NDT method that enables fast and low cost 100 % testing of components and materials in the ceramic and metal industry. A crack in a component causes certain resonances displaced to low frequencies whilst others remain the same. This qualitative method differentiates between defective and non-defective parts for quality assurance in volume productions. Combining the results of the theoretical (FEM) and practical (resonance frequency measurement) approach allows a fast and low-effort evaluation of the classification reliability. The FEM results are used to set up the test characteristics for the inline test system and allow an estimation of the detectable deficiency size. The part vibrations can be measured contactless by laser scanning or with a microphone. This contribution presents the method and application for automotive components like conrods within the sonic and ultrasonic range (up to around 50 kHz). The high degree of resolution down to less than one Hertz enables the detection of very small defects.
Acoustic resonance analysis using FEM and laser scanning for defect characterization in-process NDT
Akustische Resonanzanalyse mittels FEM und Laserabtastung zur Fehlercharakterisierung bei der ZfP im Betrieb
2006
8 Seiten, 10 Bilder, 1 Tabelle, 3 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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