In this example, the isi-Vibrografie-System congregates with an extra developed Piezo-Shaker-Modul, to be used for the non-destructive inspection. The leading edge flap with C-Si-C (carbon fiber- silicium composite) of the prospective recovery vehicle/ spacecraft x38 was reviewed.
Picture 1 shows the shaker module, which for an easier handlingis compressed on the surface of the object via suction base .
Picture 1: isi-Piezo-Shaker module (a), therewith e.g. the leading edge flap (b) of the prospective spacecraft X38 was inspected (c).
Picture 2 shows the determination of times of the leading edge flap with the eigenfrequency (1400 Hz). During the inspections two defects have been detected at the upper area of the dog (10.000 - 18.000 Hz), which are demonstrated in picture 3.
a
b
c
Picture 2: Eigenfreuquency of the nose hood at 1400 Hz
Picture 3: Local vibration forms of defects at 10kHz and 18 kHz of the nose hood in the marked red area of image 2.
Non-destructive testing and dynamic excitation
- Inspection of a CFRP-tank - Rotor blade - Carbon fibre beam
- Vacuum chamber - Vibration excitation - GLARE-plates
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Copyright by isi-sys GmbH, T:++49 (0) 561-739798-0, info@isi-sys.com, last update on 12. jul 2010
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