On the Effect of External Bending Loads in Bolted Flange Joints

Bouzid, Hakim

doi:10.1115/1.3006895

Cited by 18 publications

(7 citation statements)

References 4 publications

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“…Dynamic performances of pipe systems assembled by flange joints caught the attention of researchers. The behavior of the bolted flanges under bending loads was tested by Bouzid [111], aiming at verifying an analytical model used to treat flanges subjected to bending loads such as those produced by external moments and misalignments and capable of integrating leakage around the gasket circumference. Further dynamic experiments were carried out by Ahmadian et al [112] Luan et al [113], by exciting the assembled structure at different points under free-free boundary conditions using a hammer (Fig.…”

Section: Structures Connected By Flange Jointsmentioning

confidence: 99%

Experimental studies on the energy dissipation of bolted structures with frictional interfaces: A review

Wang,

Ma,

Hong

et al. 2024

Friction

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Bolted joints play a more and more important role in the structure with lighter weight and heavier load. This paper aims to provide an overview of different experimental approaches for the dynamic behavior of structures in the presence of bolted joints, especially the energy dissipation or damping at frictional interfaces. The comprehension of energy dissipation mechanisms due to friction is provided first, while the key parameters and the measurement techniques, such as the excitation force, the preload of the bolt, or the pressure at the interfaces, are briefly introduced. Secondly, the round-robin systems aim to measure the hysteresis parameters of the frictional joints under tangential loads are reviewed, summarizing the basic theory and the strategies to apply the excitation force or acquire the response in different testing systems. Followed by parameter identification strategies for bolted structures, the test rigs with one or more simplified bolted joints are summarized to give an insight into the understanding of typical characteristics of bolted structures, which are affected by the presence of friction. More complex test rigs hosting real-like or actual engineering structures with bolted lap or flange joints are also introduced to show the identification process of the dynamic characteristics of bolted connections employed in specific applications. Based on the review paper, researchers can get the basic knowledge about the experimental systems of the bolted structures, especially several classical round robin systems, such as the Gaul resonator and widely used Brake-Reuß beam system. Readers can take advantage of this background for more creative and effective future studies, make more progress on the study of assembled structures and understand the influence of bolting frictional connections on the dynamic response better.

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Section: Structures Connected By Flange Jointsmentioning

confidence: 99%

Experimental studies on the energy dissipation of bolted structures with frictional interfaces: A review

Wang,

Ma,

Hong

et al. 2024

Friction

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“…The sealing performance of a gasket flange joint was studied by many researchers with finite element analysis. 20,21 In Mathan's research, spiral wound gaskets and non-metallic gaskets with various sealing materials were simulated to examine the stress distribution at the sealing region, which reflected the sealing performance of the flange joint. 22 The sealing performance of a cone valve was also studied with finite element analysis and experiment.…”

Section: Introductionmentioning

confidence: 99%

Research on the sealing performance of a seawater stop valve considering roundness error used in an 11000-m manned submersible

Wang

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The sealing performance is a critical characteristic of the stop valve used in an 11000-m manned submersible, while it is a challenge when the pressure difference at the valve port reaches 120 MPa. Previous studies have mainly focused on the effect of surface microtopography, such as the surface roughness, on sealing performance. They believed that rougher surfaces will result in more severe leaks. However, in the sealing experiments of two stop valves with different materials and surface roughness in this paper, the relationship between surface roughness and sealing performance is inconsistent with existing research. There should be another factor that affects the sealing performance of the stop valves more strongly. So a new sealing principle considering the roundness error is proposed. The sealing force, which is determined by the environmental pressure, creates radial deformation on the valve port. The radial deformation of the valve seat is analyzed by a validated finite element analysis (FEA) at various environmental pressures. Then the critical environmental pressure at which the leak stops is obtained when the radial deformation is greater than the roundness error, which is measured. The results show that the critical environmental pressure obtained by FEA is very close to that obtained by experiment. So the consideration of the roundness error of the valve seat is accurate and helpful to the research on the sealing performance of the ultra-high pressure stop valves, and the sealing performance of the ultra-high pressure stop valve can be easily evaluated by FEA.

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“…Jaszak [ 13 ] described the results of experimental studies, wherein the use of an elastic serrated gasket in bolted flange connections provided a significant increase in the connection tightness compared with the tightness of the connection sealed with a standard gasket. Bolt force variations in a bolted flange connection, due to the bending moment, were investigated by Bouzid [ 14 ]. Ding et al [ 15 ] studied the effect of the number and arrangement of stiffeners on the stress state of bolted flange connections subjected to tension.…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies of an Asymmetric Multi-Bolted Connection under Monotonic Loads

2021

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This article describes the experimental studies of a preloaded asymmetric multi-bolted connection in the exploitation state. The construction of two stands were introduced: for bolt calibration and for evaluating the bolt forces in a multi-bolted connection. The bolts were tightened in a specific optimal sequence, in three passes, monitoring the force values in the bolts using a calibrated strain gauge measuring system. The studies were conducted for the selected multi-bolted connection on an Instron 8850 testing machine. The measurement data were saved in MATLAB R2018b Simulink. The measurement results were analysed statistically and are presented via charts showing the distributions of the normalised values of the bolt forces as a function of the linearly increasing and decreasing exploitation loads. We show that the forces in individual bolts, after unloading the multi-bolted connection, change in relation to the initial values of their preload.

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On the Effect of External Bending Loads in Bolted Flange Joints

Cited by 18 publications

References 4 publications

Experimental studies on the energy dissipation of bolted structures with frictional interfaces: A review

Experimental studies on the energy dissipation of bolted structures with frictional interfaces: A review

Research on the sealing performance of a seawater stop valve considering roundness error used in an 11000-m manned submersible

Experimental Studies of an Asymmetric Multi-Bolted Connection under Monotonic Loads

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