Features of Bolted Joints with Tap Bolts (Cases where a Clamped Part with a Full Face Metallic Gasket is the Cover of a Pressure Vessel and a Circular Flange)

Abstract

The design method of bolted joints with gaskets is almost based on experience, and the sealing performance is not made clear by the theoretical analyses. In the present paper, discussion is made on the distribution of contact stress in the bolted Joints fastened with tap bolts, when a clamped part with a gasket is the cover of a pressure vessel and a circular flange. The distribution of contact strels is analyzed as a three-body contact problem, using the three dimensional theory of elasticity. Moreove the contact stress is measured by means of ultrasonic-waves. In addition, the force ratio (the ratio of an increment of the bolt axial force to an external load) and the maximun stress caused in bo s taking account of a bending moment are analyzed. For verification, experiments are carried out and the analytical results are in fairly good agreement with the experimental ones. © 1986, The Japan Society of Mechanical Engineers. All rights reserved.