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This figure shows a sequence of four individual computer generated illustrations.
The first illustration shows a three dimensional, rectangular post embedded in a frame of sorts. The post itself is colored dark blue while the frame is colored a dark red. The post is being impacted near its top left-hand side by a cylindrical device. The impact is recorded at a time equaling zero. No damage has as of yet resulted to the post due to impact.
The second illustration shows the same rectangular post structure, now with the slightest indent at the point of impact from the cylindrical device. The point at which the post is embedded in the frame has been compromised, a split occurring along that line from left to right as the post leans to the right. The impact is recorded at a time equaling 10.501.
The third illustration shows the same rectangular post structure angled to the right only a fraction more from the previous illustration. However, the structure has begun to disintegrate, leaving only large fragments of itself from the point in which it is embedded into the frame to the point in which initial contact with the cylindrical device has taken place. The impact is recorded at a time equaling 10.736.
The fourth illustration shows the same rectangular post structure. The body of the structure has disintegrated even further in this illustration, only the slightest fragments now visible from the point in which the structure is embedded into the frame to the point above the point in which the cylindrical device has impacted the post. The impact is recorded at a time equaling 10.845.
FHWA-HRT-05-096
