Figure 71. Section forces through post just below impact: Fast bogie simulation. Graph.

This graph shows two distinct lines. The first line is colored red and is labeled A5 Aptek while the second line is colored blue and is labeled B5 UNL. The vertical axis of this graph ranges from negative 10 to positive 50 and represents X-force in kilonewtons while the horizontal axis of this graph ranges from zero to 40 and represents Time in milliseconds. Both lines begin at the point of zero on both axes. From there they spike to the point of 45 on the vertical axis and 2 on the horizontal axis and then drop to 26 on the vertical axis and 3 on the horizontal axis. The lines then spike again to 46 on the vertical axis and 5 on the horizontal axis before then drop again to the point of 10 on the vertical axis and 10 on the horizontal axis. From there the two lines oscillate across the graph, the blue line a little heavier than the red line, before both lines leave the graph at the point of 2 on the vertical axis and 40 on the horizontal axis.

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FHWA-HRT-05-096