Compliance of the tightened threaded connection
Authors: Buketkin B.V., Zyablikov V.M., Semenov-Ezhov I.E., Shirshov A.A.
Published in issue: #3(87)/2019
DOI: 10.18698/2308-6033-2019-3-1855
Category: Mechanics | Chapter: Dynamics, Strength of Machines, Instruments, and Equipment
The performance of the threaded connection is largely determined by the amount of tightening force value. One of the criteria for the connection performance is the presence of a minimum guaranteed contact pressure on the surfaces (flanges) to be connected. An important characteristic used in the design of the connection is the axial load factor defined by the compliance of the bolt and flanges (package). As a result of the numerical analysis of the bolted flange package stress-strain state, the dependence of the threaded connection elements on their rigidity and the connection tightening force was established. It is shown that the use of a flat gasket made of soft materials between the flanges leads to a decrease in the maximum contact pressure, an increase in the size of the contact spot and a decrease in the axial load factor. The use of flat metal gaskets practically does not affect the size of the contact spot and the level of the contact pressure, but, nevertheless, leads to a decrease in the axial load factor
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