Vibrothermography movie: MJPEG (40 MB) | Ogg Theora (12.5 MB)
This movie shows (slowed down 10x) a series of infrared images of cracks and other
indications on a stator vane heating in response to vibration. The images have the
background subtracted out so all you see are the changes. (The outline of the vane
is due to the vane shifting position slightly in the clamps.) The excitation started at
t=.2 seconds (2.0 seconds into the clip) and ended at t=1.2 seconds (12 seconds into
the clip). There are major cracks in the trailing edges and on the vane surface. A
pattern of deep indications (wide blurs) comes from separators that hold the vane
surface away from the interior baffle.
Codecs for Ogg Theora are available from xiph.org