Studying the stress-strain state of a vehicle cardan shaft with the removable hinges

The paper presents examples of using cardan shafts in the automotive engineering. It analyzes causes of failures in the cardan shaft joint crosspieces. The methods of cardan joints technical maintenance and shortcomings in the instructions for their implementation are considered. A modular modernized design of the cardan shaft is developed to improve reliability and durability of the vehicle cardan joints. A distinctive feature of hinge assemblies of the new cardan shafts is a possibility of their technical maintenance and replacement without removing from the vehicle trapezium. The paper shows that for objective assessment of the modernized cardan shaft in terms of its operational reliability, it is necessary to study the device using the modern methods. The data from previously performed studies of the mechanical engineering objects are analyzed, including the cardan shaft joint crosspieces. Results of the analysis are making it possible to apply the numerical simulation method to the modernized cardan shaft of modular design. Results of studying the modernized cardan shaft on the simulation models of the cardan shaft pipes welded joints are presented. The paper demonstrates that the cardan shaft proposed design has better technical characteristics than the basic product version. Practical significance of this work lies in significant reduction in terms of the technical maintenance and repair, which significantly increases the product service life.
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