Figure 121. Fringes of damage for bogie impact at 29.5 miles per second (default properties for saturated Grade 1 pine with rate effects). Diagrams.

The four diagrams are accompanied by a legend to the right hand side of the figure. The legend shows indicated fringe levels, in a variety of colors. The scale begins in dark blue, being the lowest fringe level, scales up through green, then yellow and into red, representing the highest fringe level.

4 milliseconds.

This figure shows a computer-generated illustration of a post. The top half of the post leans to the right at a slight degree with a gap forming near the mid-point of the structure. The majority of the post is colored a dark blue. The small section of yellowish-green is visible just under the gap as is there another section of the same color near the top of the top half of the post near the impact area.

10 milliseconds.

This figure shows a computer-generated illustration of a post. The top half of the post leans considerably more to the right, at a rough twenty-five degree angle from its original position. The gap forming at the mid-point of the structure has widened. The section beneath the gap colored green has increased in length.

15 milliseconds.

This figure shows a computer-generated illustration of a post. The top half of the post leans further still to the right at a rough forty-five degree angle. The small section of green beneath the gap remains the same as does the section at the top of the top half of the post, though the small section of the post now holding the two halves together appears to be colored a light green.

34 milliseconds.

This figure shows a computer-generated illustration of a post. The top half of the post now rests at a rough ninety-degree angles with the lower half. The gap now appears mangled and jagged with the area just above it colored light green to dark red. All other fringe levels remain the same.

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FHWA-HRT-05-096