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Image Caption
These still images from a mode-I traction simulation experiment on a pre-cracked perforated domain illustrate brutal propagation of a crack from one perforation hole to the next. The light blue to the right of the as yet in-tact perforation hole indicates the progression of stress as the crack propagates through the domain.
  
From:
Visualization: LSU Mathematician Uses EnSight to Predict Structural Failure
Posted Mon February 16, 2009 @01:27PM
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Application By Kara L. Gray,
New Horizon Consulting

When the I-35W Bridge in Minneapolis collapsed during the evening rush hour on August 1, 2007 killing 13 people, millions were stunned by the tragic scene. Images of cars, semi-trucks, and even a school bus, teetering some 115 feet over the mighty Mississippi River left many wondering, “Could that happen here, where I live?” In the days that followed, motorists around the country gave more careful consideration to the bridges and overpasses that they travel every day, which before had never garnered a second thought. While the specific cause of the collapse remains undetermined, most experts agree that some mechanical failure is to blame.

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