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Exploring Glass Breakage: Impact and Deformation Analysis

Dive into the detailed characterization of glass breakage - Does glass deform when impacted? How does it deform? Can we measure deformation? Explore crack formation post-impact, measure crack formation speeds, and analyze crack directions. Discover the basics of HSV setup, edges illumination, and crack viewing with advanced equipment. See results from the Crack Formation Phantom, data points analysis, and crack velocity calculations. Uncover fascinating insights into glass fracture mechanics!

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Exploring Glass Breakage: Impact and Deformation Analysis

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  1. The Breaking of Glass Strobe 6: Friday 10am–1pmstrobe6@mit.edu Adam Seering aseering@mit.edu Aubrey Tatarowicz altat@mit.edu Daniel Hernandez djh@mit.edu John Hawkinson jhawk@mit.edu Strobe 6 Final Project

  2. 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?

  3. Basic HSV Setup

  4. A look at the Grid and Diffuser

  5. Edge Illumination for Viewing Cracks

  6. Results for Crack Formation Phantom. 50 mm lens. 75,000fps. aperture = f/1.8. 4 pumps on BB gun.

  7. Analysis of Crack Formation

  8. Data Points Collected Collected data in pixels and used the following to convert to mm: 178 pixels = 25mm

  9. 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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