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Auto/Steel Partnership - American Iron and Steel Institute

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Analysis of Vehicle With New Rail System<br />

12. There is one less weld at the back of the lower flange on the front rail inner <strong>and</strong> outer due to<br />

the addition of a chamfer.<br />

13. Structural adhesive was used on the lower flange of the front rail inner <strong>and</strong> outer between the<br />

front cradle mount, rather than welding. This was necessary due to lack of access for the<br />

weld gun in this area, due to the order of assembly. The adhesive was represented by a<br />

continuous rigid connection.<br />

14. The front hood bolts were failed at 32ms, as observed in the test vehicle. The bolts in the test<br />

vehicle were 6mm in diameter, instead of the 8mm diameter bolts in the production vehicle.<br />

This failure is only applicable to NCAP simulation <strong>and</strong> should not be used for IIHS<br />

simulation.<br />

The following modifications could not be made to the FE model:<br />

� The geometry of the engine mounts in the CAD/FE data is different from that of the actual mounts<br />

in the test vehicle. Consequently, the engine mount models could not be updated.<br />

� An extra bracket on the side of the front cradle mount was not modeled as it was a non-structural<br />

part <strong>and</strong> no CAD data was available.<br />

Figure 1: Rail Extension Reinforcement<br />

7<br />

<strong>Auto</strong>/<strong>Steel</strong> <strong>Partnership</strong>

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