Abstract
Frame is the stress of the main components of automobile chassis, under various direction and the form of load, the main damage form is fatigue failure under cyclic loading. In order to predict the fatigue life of the frame structure, combines the finite element analysis and multibody dynamics simulation, the vehicle multi-body dynamics model was established, and according to the China traffic simulation, the corresponding load spectrum was got. Frame finite element model was established and a strength analysis was carried out for the model, on this basis, according to the frame material fatigue performance data and load process, the fatigue life of the frame was studied by using finite element analysis software analysis, the fatigue life distribution and the position of the prone to fatigue failure of the frame were found, the results show that the strength and fatigue life of the frame were comply with the design requirements.
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