This final project examined the measurements of breaking glass using
both high-speed video photography and sync-and-delay still
photography.  We experimented with a wide variety of ways to break the
glass, and were able to produce quantitative measurements in several
of those cases.

We began investigating glass breaking with thermal shock, mild impact
(falling weight), and high impact (BB rifle).  We found the BB rifle
produced the most reproducible and consistent results.

We used methods to look at both the crack formation in the glass as
well as the deformation of the shape of the glass due to impact.  We
used the data obtained to analyze the way shock waves move through
glass.  We found that the speed of the wave propagation and the crack
formation were on the order of the speed of sound in glass.

We examined glass breaking using the Edgerton Center's Schlieren
apparatus, but we did not discern any interesting optical properties
with the Schlieren system.

We recommend that:


* We look into purchasing a faster high-speed video camera that can take video at rates fast enough to capture at least 10-15 frames of glass cracking.  This would be ten times faster than the Phantom camera.
* We retake video with a faster camera as described above in order to get more accurate measurements.
* We look into purchasing or creating software that can take two-dimensional images and turn them into three-dimensional images to better understand the deformation of the glass's surface.
* We repeat these tests with imaging the glass deformation with the above described software.