Numerical Simulation Of The Wheel Hub During The Cast Processing And Fatigue Properties Evaluation

In this work, the aluminum alloy wheel hub was selected as the research object, thecasting process and the structure of aluminum alloy wheel hub was calculated byanalyzing their characteristics. By analyzing the stress distribution, the dangerous pointson the wheel hub made by different materials can be determined. On this basis, the fatigueproperties of aluminum wheel hub have been carried on the numerical simulation andexperimental research, providing a certain theoretical basis for practical production whichprovides certain theoretical basis for practical production.The results indicate that, the mold structure have a great influence on filling processof castings, spokes and rim prone to filling the uneven phenomenon. In the design of themold, the liquid metal flows unobstructed should be ensured, in order to avoid congestiondue to the mound structure. After casting solidification, shrinkages are appeared on theheart part of the wheels and the spokes near the rim, and it can be eliminated throughincrease cooling intensity in the corresponding position. The large stresses are excited inthe wheel bolt hole, which is near the wheel center and spokes, so it is very easily broken.The Junction of the spokes and rims also has some high stress areas, which is also prone todamage. Moreover, the spokes roots, which are the spokes near the center position and thejunction of the spokes and the rims, are usually occurs large strain. Therefore, defects suchas cracks are easily appeared in this position. On this basis, the fatigue properties ofaluminum wheel hub have been carried on the numerical simulation and experimentalresearch, providing a certain theoretical basis for practical production.For the wheel hub, during the bending fatigue experiment, in the used initial offsetrange, there is no fatigue crack can be found, so it is satisfy the bending fatigueexperiment standard; on the condition of the17920N radial loading and2.5millions rotate,there is also no fatigue crack occurs, so it is satisfy the radial loading fatigue experimentstandard; moreover, the result of impact experiment show that the cracks are easilyappeared in the spokes roots, which is consistent with the calculated results.