| In this dissertation, the connecting rod of a Cummins-diesel is studied. In this study, the assembling model is built with the 3-D modelling software Pro/E. Because of the affection of contact and pre-tension force, the 3-D model contains piston pin, crank pin and bearing shells, and it was built on the base of their real structure. Then, through the interface the model was transformed into the finite element analysis software ANSYS. Through the study of the connecting rod in finite element method, the deformation, stress and intensity are gained. It can be found that the reliability is enough. The normal calculating method of safety factor is taking out of a few nodes solution and performing the post-process, then searching for the dangerous area. This method can not evaluate the reliability of a connecting rod fully. So, we bring forward a more efficient method to evaluate the reliability of a connecting rod. Through the element table in the ANSYS software, all of the elements fatigue safety factor can be calculated, moreover, it can be demonstrated with contour curves, and it can also be queried easy. This analysis process can be compiled with the command chain APDL in the ANSYS software; it can also serve as the post-process program to some similar structure. In this dissertation, we also verify the accuracy of the above method. It is found that the smaller the element size is, the smaller the difference between the elements solution and the nodal solution is. We can say, with the development of computer hardware, elements size can be divided smaller. Thus, the result calculated by this method will be more accurate.
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