Finite element evaluation of clearance effect on tube-to-tubesheet joint strength

Analytical modeling of tube-to-tubesheet joints subjected to plastic deformation and creep

“…Referring to this graph, the residual contact pressure decreases with an increase in the tube tangent modulus with a quasi linear relationship if the tubesheet remains elastic. Obviously, there is no effect of initial clearance when Ett tends towards zero which represents the elastic perfectly plastic behaviour, confirmed by Merah N. et al, 2003. Figure 7 shows the effect of strain hardening in the case where partial yielding of the tubesheet is present.…”

“…In order to overcome the problem of the divergence related to the nonlinearity during the loading phase, the expansion pressure was gradually applied, and in particular, when the tube plastic collapse is reached. The plane model is presented, in Fig 3. The friction was not taken into account as previous studies showed that the influence of friction on the residual contact pressure is not significant (Merah et al, 2003). A mesh convergence criterion was run to validate the FE model.…”

Study on Contact Between Double Metal Composite and Pipe Power Slip for Offshore Well

“…Hongliang Tian carried out experimental study for the coefficient of friction between the slips and the drill, who obtained changing scope and value of grooved slip friction coefficient, and clearly put forward the axial grooves, lateral grooves and slip teeth Board tooth surface will affect the coefficient of friction [6]; Weiliang Liu studied the affection of different tooth surface for the impact force, proposed reducing clamping system preload by changing the structure and shape of the tooth surface slip for increasing the friction coefficient method, in order to stabilize the double metal composite pipe clamping system [7]; Wang Yong, who analyzed the anti-failure mechanism of dynamic slip gripping zone, and further proposed measures to prevent drilling failure in the slip zone [8]; WHSPiri and WBReinhold studied the mechanism of damaging drilling by slip, and analyzed the double metal composite pipe bite injuries on several factors, such as slip tooth dental plate, pipe load [9,10]. But the work of the specific studying a tooth dental plate slips parameters affect for the drill has not yet commenced, and the affection of changing each slip tooth plate parameters on drill plastic damage is particularly large, in this paper, the double metal composite pipe damage for the contact area was systematically studied , since the contact area slips dental plate and double metal composite pipe slips directly determines the size of the hold force and friction, the work is essential to the use of slip, which is one of the key challenges of the double metal composite pipe slips injury [11,12].…”

“…(8), we can find that, in case of determined the tooth affecting factors of contact area, the larger for teeth tooth top width l, less for stress of tooth plate, the stress on the double metal composite pipe is also smaller. However, when the stress is too small, the friction between the tooth plate and drill is not sufficient to hold the hanging double metal composite pipe, double metal composite pipe slips tooth plate and critical contact friction is determined by Coulomb friction law [11]:…”

Analytical Solution for Interference Fit for Multi-Layer Thick-Walled Cylinders and the Application in Crankshaft Bearing Design

“…Under the hypothesis of the same axial length for the multi-layer thick-walled cylinders, the theoretical pressure are constant on the whole contacting surface; in contrast, if the shaft extends beyond the hub there is a stress concentration occurring at the extremities of the contact zone [22], which can be evaluated by performing numerical investigations, such as finite element analysis. The above stress concentration phenomenon can be hardly presented by regular theoretical solution based on Lamé's solution for the thick-walled cylinders.…”