锻铣铝合金轮毂弯曲疲劳试验仿真判据研究及应用

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中图分类号：TU463.343；TH114 文献标志码：B DOI：10.19710/J.cnki.1003-8817.20250242

Study and Application of Simulation Criteria for Bending Fatigue TestofForgedandMilled Aluminum AlloyWheel Hub

Xia Shule， Li Minglei， Yuan Shenglong， Zhai Long，Meng Xiaohe， Tian Xiaohu （CITIC Dicastal Co.， Ltd.， Qinhuangdao O66000）

Abstract：To developareasonable simulationcriterion for forgedand milled wheel hubs，thisstudy focuseson aluminum alloy whel hubs subjected to forging and milled.Using optical microscopy，Scanning Electron Microscopy （SEM），and Energy-Dispersive Spectroscopy （EDS）， the microstructural changes at the whel spoke locations beforeand after milledarefirstobserved.Itis found thatmillingdestroys thefibrousstructure formedby forging，leavingalarge numberof grainboundaries exposedonthesurfaceof theproduct.Secondly，the bending fatigue failurebehaviorof forged and milld whelhubs isstudied，anditisfoundthatthemainfatigue crack originatesfromthe material surface and propagatedradially inward，withno impurityelements in the crack source area.Secondary cracksoriginate from exposed grain boundariesand initiallypropagatealong thegrain boundaries.As thecrack propagation deepens，mixed propagation occurs.Finally，the S ⋅N curve of the forged wheel hub is corrected using the nominal stress method，and the S -Ncurveof the forgedandmilledwheel hubisobtained.Thestresssimulationcriterionobtainedfrom this curve is applied to the trial production of new products，and the simulation accuracy reaches over 98%

eywords：Forgedandmilledaluminum alloywheel hub，Bendingfatigue，Simulationcriter

1前言

近年来，国内锻造铝合金轮毂发展迅速，在乘用车中的应用越来越广泛[-2]，同时，国内商用汽车企业开始逐步装配锻造铝合金轮毂。（剩余5660字）