Effects of the Interface Configurations on the Characteristics of Bolted Joints : the case where clamped parts are two hollow cylinders

概要

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In the design of bolted joints, it is important to examine the sealing performance and to estimate the force ratio (the ratio of an increment of bolt axial force to a load). Up to now, in order to improve the sealing performance, raised faces of the interfaces have been used. But the uses of these interfaces depend on experiments and the theoretical grounds are not made clear. In the present paper, in the case where two hollow cylinders having raised faces are fastened by a set of bolt and nut, a contact stress distribution is analyzed using three-dimensional theory of elasticity and point matching method. The force ratio of this joint is also analyzed. For verification, experiments are carried out. Analytical results are in a fairly good agreement with experimental ones. Then, discussion is made on effects of the interface configurations on the characteristics of the bolted joint.
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