Figure 41. The force-deflection histories calculated from the wood post cross-sectional forces are not significantly affected by details of the bogie model or sampling frequency. Graph.

This graph shows four distinct lines. The first line is solid yellow and is labeled Grade 1 Southern Yellow Pine test 657 while the second is solid blue and is labeled Rigid Bogie, Sampled at 3200 Hertz. The third line is solid red and is labeled rigid bogie, sampled at 10000 Hertz. Finally, the fourth and final line is solid green and is labeled Elastic Bogie, Samples at 10000 Hertz. The vertical axis of this graph ranges from 0 to 70 and represents Force (kilonewtons) while the horizontal axis of this graph ranges from 0 to 200 and represents Deflection (millimeters). All four lines begin at the points of zero on both the vertical and horizontal axes. The yellow line slopes upward where it peaks at the points of 50 on the vertical axis and 75 on the horizontal axis and then slopes downward steeply and leaves the graph at the points of zero on the vertical axis and 150 on the horizontal axis. The blue line slopes up to the points of 40 on the vertical axis and 45 on the horizontal axis where it then curves downward and off the graph at the points of 5 on the vertical axis and 200 on the horizontal axis. The bred line slopes up to the points of 40 on the vertical axis and 50 on the horizontal axis where it then curves downward and off the graph at the points of 5 on the vertical axis and 200 on the horizontal axis. The green line slopes up to the points of 43 on the vertical axis and 50 on the horizontal axis where it then curves downward and off the graph at the points of 15 on the vertical axis and 200 on the horizontal axis.

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FHWA-HRT-05-096