An unsatisfactory stress condition existing in a molded nylon engine cooling fan was identified in strain gauge testing in a vehicle application. In order to reduce the high stress condition observed at the blade-hub interface, an experimental stress analysis program was initiated. Various blade contours were evaluated on an axial shaker and in a test facility simulating the strain levels observed in the vehicle. The results were utilized to modify the mold and sample molded fans confirmed the analysis method.
Subscribers can view annotate, and download all of SAE's content. Learn More »