Contact Pressure Distribution in Joints Formed by V-Band Clamps

Abstract

Abstract. V-band clamps offer an efficient clamping solution in diverse applications including process equipment, exhaust systems and air handling. This paper studies the distribution of interface contact pressure between the V-band and flange when the coupling is established. The determination of the contact area and pressure distribution in a joint is essential information, as it determines the integrity of the coupling. A three dimensional finite element model has been developed for this purpose. Contrary to the previous assumption in developing axisymmetric models, the 3D results showed that the contact pressure is nonuniform around the circumference of V-band with maximum contact pressure near the T-bolt area. This is in agreement with the theory in the literature. The presence and magnitude of friction has a noticeable influence on the form of the interface pressure distribution curve. It is also shown that the diameter of the band interacts with the effect of friction.

Simulating Torsional Slip in V-Band Clamp Joints

“…The increase in transverse bending moment, or reaction moment about the z-axis during the tightening step indicates that the axial load transmitted from the band to the flange is not uniform but is higher closer to the T-bolt. This is consistent with the findings in [6]. The torsional load capacity of the joint is shown by the reaction moment about the central axis as the rotation is applied in the torsion step.…”

“…They noted that the analysis of this type of problem was not straightforward: the accuracy of the results depended on the number of elements and their size along the sliding contact area. Reference [6] found significant variation of the contact pressure distribution around the V-band joint, especially with a high coefficient of friction (CoF). This FE analysis confirmed the previous theoretical model [3] but highlighted the fact that this variation could only be encapsulated in FEA using a 3D model.…”

Uncertainty analysis and reliability estimation of clamp band joints

“…However, they mostly focused on the improvement of the model to increase the accuracy of the results and the performance of the analysis using analytical or numerical models. Stress distribution and contact pressure were investigated in clamp band joints using the finite-element method [8] and the empirical method for determining axial load distribution in joints formed by V-band clamps was investigated [9]. These models were utilised to optimise the design of the joint [9].…”