the breaking of glass
DESCRIPTION
The Breaking of Glass. Strobe 6: Friday 10am–1pm [email protected] Adam Seering [email protected] Aubrey Tatarowicz [email protected] Daniel Hernandez [email protected] John Hawkinson [email protected]. Strobe 6 Final Project. We want to characterize how glass breaks. - PowerPoint PPT PresentationTRANSCRIPT
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The Breaking of Glass
Strobe 6 Final Project
Strobe 6: Friday 10am–1pm [email protected]
Adam Seering [email protected]
Aubrey Tatarowicz [email protected]
Daniel Hernandez [email protected]
John Hawkinson [email protected]
![Page 2: The Breaking of Glass](https://reader034.vdocument.in/reader034/viewer/2022052414/56814796550346895db4caac/html5/thumbnails/2.jpg)
![Page 3: The Breaking of Glass](https://reader034.vdocument.in/reader034/viewer/2022052414/56814796550346895db4caac/html5/thumbnails/3.jpg)
We want to characterize how glass breaks.
• Does glass deform when impacted?– How does it deform?– Can we measure deformation?
• After impact, how do the cracks form?– Can we measure crack formation speeds?– In what directions do cracks form?
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Basic HSV Setup
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A look at the Grid and Diffuser
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Edge Illumination for Viewing Cracks
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Results for Crack Formation
Phantom. 50 mm lens. 75,000fps. aperture = f/1.8. 4 pumps on BB gun.
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Analysis of Crack
Formation
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Data Points CollectedDistance from BB impact (in mm)
Crack # Blue dot Green dot
Yellow dot
1 n/a 43 61
2 9.6 38 n/a
3 11 46 n/a
4 n/a 39 44
5 12 36 45
6 n/a 41 n/aCollected data in pixels and used the following to convert to mm: 178 pixels = 25mm
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Calculating Crack Formation Velocity from Data
• Crack 5:– 36 mm x 75,000fps = 2.7 x 106 mm/s
= 2700 m/s
• Fastest Recorded Crack Speed:– 46mm x 75,000fps = 3.45 x 106 mm/s
= 3450 m/s.
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Grid points before impact
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Grid points before impact
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Movement of grid points
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Initial distance from origin (px)
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Histogram of movement
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Frequency (1px bins)
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Grid points before impact (1)
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Grid points during impact (2)
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Grid points during impact (3)
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Movement of grid points (1-2)
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Distance from impact (px)
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Movement of grid points (2-3)
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Movement of grid points (1-3)
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Distance from origin
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Velocity of grid points (1-3)
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Distance from origin (px)
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