On the Issue of Designing Cantilever Shafts with Joint Consideration of Strength, Endurance and Rigidity

Abstract

The article considers a method for calculating cantilever shafts, which simultaneously takes into account both the strength and endurance of the shaft, and its rigidity. For this purpose, a so-called rigid shaft model is used. Usually, the strength calculation is carried out as a design, and then the stiffness calculation is carried out as a test, that is, separately from each other. In this case, it may turn out that the design does not fully meet all the requirements. These requirements are usually related to the parts mounted on the shaft, including the type of shaft supports. Gears, variable gear pulleys and rolling and sliding bearings have strict requirements for shaft deformations at the point of their landing. Adjusting the stiffness of the shaft when calculating its strength allows you to simultaneously take into account these requirements. This adjustment is possible because it depends on the design of the shaft. If there is a need to change the stiffness of the shaft in a certain section, the technique allows you to adjust its value to take into account the need for this section. A concrete example is given for a cantilever shaft with a rigid seal.