Damage detection and quantification using the acellent scangenie acousto-ultrasonic system
Acousto-ultrasonics is a Structural Health Monitoring (SHM) technique that utilizes principles of guided wave propagation through the structure's surface for damage detection. Piezoelectric elements transmit waves which propagate through the structure and interact with damage. To measure damage, the system records wave readings along a path and compare it to a baseline (wave readings that were previously recorded prior to structural damage). This paper discusses results of tests performed using an Acellent ScanGenie SHM system and its SmartPatch software package V1.0 as a means of detecting and quantifying crack growth and patch disbonds. Three types of coupons were used in this study. The first coupon was a metallic specimen with a center surface crack. The second coupon was a metallic specimen with no crack that has undergone a bonded composite patch repair. The final coupon was an aluminum specimen with a center surface crack and a bonded composite patch repair. During experimentation, the crack lengths were measured using a traveling microscope (where applicable) and patch disbonds were detected and validated using thermography. During analysis the direct path image utility identified the damage location, while the semi-empirical utility extrapolated damage sizes. Direct path images were generated and compared to previous images of the same specimen to obtain indication of damage and its location. The semi-empirical analysis utility provided crack growth and disbond area values which were compared to estimates provided by the US Air Force Growth (AFGROW) software, as well as actual values obtained from the traveling microscope or thermography respectively.
|Keywords||Acellent, Acoustic ultrasonic, Patch repair, Structural health monitoring, Surface crack detection|
|Conference||21st International Conference on Adaptive Structures and Technologies 2010, ICAST 2010|
Habib, F. (F.), Martinez, M. (M.), Artemev, A, Genest, M. (M.), & Brothers, M. (M.). (2010). Damage detection and quantification using the acellent scangenie acousto-ultrasonic system. In 21st International Conference on Adaptive Structures and Technologies 2010, ICAST 2010 (pp. 267–282).