Inverse Reconstruction of Fracture Splitting Connecting Rod and its Strength and Fatigue Life
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To investigate the strength and fatigue life of a fracture-split connecting rod, this study combines experiments on connecting rod fracture splitting, three-dimensional reconstruction technology and the finite element technique. An actual fracture joint surface of a connecting rod is obtained by fracture-splitting experiment, and its mode is reconstructed by reverse engineering. Subsequently, the reconstructed fracture plane is imported into CAD to establish the actual three-dimensional model of the fracture-split connecting rod. The fatigue characteristics parameters of the fracture-split connecting rod material, namely C70S6, are obtained by a rotating bending fatigue test. Finally, by comparing to a traditional machining connecting rod, the inspection of the fatigue life of the fracture-splitting connecting rod is performed using the finite element method and the fatigue analysis theory. The results show that the fracture-split connecting rod meets the strength and fatigue life requirements.
KeywordsFracture splitting connecting rod Joint surface Reverse engineering Strength analysis Fatigue life
This research was financially supported by National Key Research and Development Plan (2016YFD0701102).
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