Abstract
This paper includes descriptions of the stress distribution regularities in the tight joint parts, regularities of the stress state changes in the contact region along coupling length, stress concentration factors, levels of additional stresses caused by press fitting. Distributions of stress intensity, axial stress, contact pressure, tangent stress in parts and in contact zone along coupling length are considered. Calculation results obtained by three approaches: Lame relationships, FEM without considering assembly method, FEM with considering press fitting process are analyzed and compared. The adequacy of research carried out is confirmed.
Highlights
The tight joints are widely used in the mechanical engineering
The level of additional stresses caused by mechanical assembly reaches −62.38% of stress level calculated without considering assembly method on the shaft (Figure 5(а)) and 16.54% on the hub (Figure 5(b))
1) Current research has found that mechanical assembly of the tight joint greatly affects the parts stress state
Summary
The tight joints are widely used in the mechanical engineering. Increasing demands for higher transmitting forces and torques require the reliability enhancement of machinery and equipment. Stress state of the tight joint parts should be calculated taking into account maximum number of acting loads to enhance the tight joints reliability. Stress state of the tight joint parts depends on a lot of types of loads: loads, acting during component manufacture, assembly and operation. There are works [1]-[4] where the loads acting on components during mechanism operation are considered in stress state calculation. (2014) Finite-Element Analysis of Parts Stress State of Tight Joint Assembled by Press Fitting. In paper [5] parts stress state of the mechanically assembled tight joint is investigated. The press fitting is one the of mechanical assembly methods, whose classification is presented in the paper [6].
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