These surfaces increase the frequency of inputs typically found on public roads for the purpose of accelerated mileage accumulation. This allows a test of only a few weeks’ or months’ duration to represent the total mileage a vehicle would experience in its lifetime. Included in the durability area is a 20-foot-wide by 252-foot-long water basin available for accelerated corrosion testing, water intrusion evaluation and brake soaking. Either pure water or saltwater solutions are available. The drive-through depth is 64 inches, although damming can increase the fording limits to 84 inches.
Navistar can correlate a customer's typical operating environment to an accelerated structural durability procedure and route through a road profile determination process. Strain gage and acceleration data is gathered over both the road surfaces typically encountered during the vehicle’s life and the proving grounds’ durability events. The data is then analyzed using rain flow techniques. The result is a correlation of accelerated test miles to "real world" miles for the specific components measured.
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