Browse Publications Technical Papers 2016-01-1573
2016-04-05

Rationale and Methodology for Straightening A356-T6 Wheels 2016-01-1573

This paper will document a rationale for wheel straightening based on the rise of declining roads, increased consumer preference for lower profile tires, unintended consequences of wheel customization and the reduction in energy consumption. A recommended patented procedure detailing how A356-T6 wheels can be straightened will be presented. To validate the recommended procedure a sample of wheels was uniformly deformed and straightened and subsequently tested per SAE J328 and SAE J175. Test results are provided that indicate straightened wheels should be fully serviceable in their intended service.
A laboratory protocol to replicate the wheel flange cracks is described. The protocol is used to demonstrate that wheels without deformations do not result in flange cracks. Conversely wheels with deformations in excess of 1.5mm do result in cracks at less than 750,000 cycles. Additionally, it was found that with deformations; subsequently straightened, using the enclosed process, have fatigue lives up to four times that of deformed and not straightened wheels.

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