Buckling strength is one important indicator of connecting rod design. With the increasing of power density of internal combustion engine, the compressive load of connecting rod becomes larger and larger, and bending fracture becomes one of the failure forms under unusual conditions. In this paper, combined with a case of bending fracture of the connecting rod in the development process of a new engine, a design method to ensure the safety of connecting rod is summarized as followed: according to the ultimate stress method, the stress at the middle section of the connecting rod is calculated, the additional stress caused by longitudinal bending is required to be between 10% and 15% of the normal stress, and the structural safety factor is evaluated based on them. Then the buckling test is carried out to obtain the actual buckling load and consequently the experimental safety factor of the connecting rod is reckoned. Through this method, the buckling strength of many connecting rods of several engines are tested and analyzed statistically. Thus it is concluded that the experimental safety factor of the buckling strength should be greater than 1.5, which provides an optimization method for the design and development of the connecting rod.
Optimization Analysis of Buckling Strength of Connecting Rod for Internal Combustion Engine
Lect. Notes Electrical Eng.
2020-11-05
13 pages
Article/Chapter (Book)
Electronic Resource
English
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