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International Journal of Automotive Technology > Volume 15(4); 2014 > Article
International Journal of Automotive Technology 2014;15(4): 593-601.
DURABILITY PREDICTION FOR AUTOMOBILE ALUMINUM FRONT SUBFRAME USING NONLINEAR MODELS IN VIRTUAL TEST SIMULATIONS
J. S. NAM1, H. W. SHIN2, G. J. CHOI1
1Kunsan National University
2Kunsan Automotive Technology Innovation Center
ABSTRACT
This research work presents fatigue life evaluation techniques for an automotive vehicle aluminum front subframe using virtual test simulation technology with nonlinear suspension components model. The technology was used for improving the accuracy of the polynomial model used in conventional analysis. The proposed nonlinear suspension components models were developed using direct approach. The effects of the nonlinear elements on the prediction of the fatigue life were also analyzed. Actual aluminum front subframe was tested using half-car road test simulator to verify the accuracy of the models. It was found that the proposed nonlinear models yield more accurate results than conventional polynomial models. The proposed virtual test simulation technology with nonlinear suspension components model can be used to predict fatigue life for vehicle chassis structures more accurately.
Key Words: Durability life prediction, Virtual test simulation, Flexible multibody dynamics, Nonlinear suspension components model, Front aluminum subframe
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