Statistical Model for Pressure Distribution of Bolted Joints

A lightweight optimal design model for bolted flange joints without gaskets considering its sealing performance

“…Second, bolt head (or nut) is assumed to take a cylindrical shape without thread, and the relationship holds, where R n and Rscr are the radius of the bolt head (or nut) and the screw, respectively. This relationship has been widely verified in the literature, 16,19,23,26–28 and its accuracy will be checked by FE method in “Comparison with the FE formulation” section. Moreover, since the bolts with specification M6, M8, and M10 are mainly used in the aero-engine design, the adopted bolt specification in the present study is restricted in the range of [M5, M12].…”

“…To facilitate further study, a simplified bolt model (where Rn≈1.5Rscr as proposed in “Total mass of the bolted joint system” section) that has been widely used in the literature 16,19,23,26–28 is employed in the present paper. In order to check the precision of the corresponding simplifications to the theoretical model, a 3D FE model for an aero-engine casing is constructed with the multipurpose FE program ABAQUS 6.11/Standard.…”

“…Therefore, its accurate calculation is highly expected for the optimization design of the joint system. In view of this, a number of research works have been conducted to address this issue from different aspects, 11–24 and the results in literature can be roughly divided into two categories. The first category follows the analytical solutions derived by Sneddon 11,12 and Chandrashekhara and Muthanna, 13 who studied the stress distribution in a thick plate without or with a circular hole under axisymmetric load, respectively.…”

“…Although the analytical treatment proposed by Sneddon and Chandrashekhara does not treat the plate as two separated parts (as it is in practice), their results are still widely adopted in the bolted flange joint analysis. 14–22 Recently, with the utilization of a nonintrusive ultrasonic technology, Stephen et al. 21 and Marshall et al.…”

Leakage analysis of bolted flange joints considering surface roughness: A theoretical model

“…The majority of these researches, however, are mainly focused on predicting the contact force distribution and the corresponding member stiffness, which can significantly affect the interface contact characteristics and fatigue life. 1–17 To achieve this goal, finite element (FE) analysis, 2–6 simplified analysis based on elasticity theory, 7–10,17 and experimental methods 11–17 are always applied. It is worth noting, however, that most of the studies mentioned above only considered the joints assembled with only one bolt.…”