Figure 105. Good correlation is achieved between the simulation and performance envelopes by increasing the fracture energy above the default value (to G_{f ||} = 250 G_{f ⊥}). Graph.

This graph shows three distinct lines. The first line is solid black and is labeled LS-DYNA Calculation. The second line is blue dotted and is labeled Grade 1 Test 418. The third and final line is colored solid blue and is labeled Performance Envelopes. The vertical axis of this graph ranges from zero to 75 and represents Force in kilonewtons while the horizontal axis of this graph ranges from zero to 200 and represents Deflection in millimeters. All three lines begin at the points of zero on both axes. The first line, solid black rises in a slope to 45 on the vertical axis and 45 on the horizontal axis where it then slope down unevenly and leaves the graph at 5 on the vertical axis and 200 on the horizontal axis. The second line, blue dotted, rises in a slope to 42 on the vertical axis and 45 on the horizontal axis where it then slope down unevenly and leaves the graph at 8 on the vertical axis and 200 on the horizontal axis. The third line, solid blue, rises unevenly and peaks at 58 on the vertical axis and 45 on the horizontal axis where it then descends very unevenly and leaves the graph at 7 on the vertical axis and 200 on the horizontal axis.

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FHWA-HRT-05-096