The elastic serrated gasket of the flange bolted joints

Jaszak, Przemysław

doi:10.1016/j.ijpvp.2019.103954

Cited by 28 publications

(14 citation statements)

References 3 publications

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“…Analyses of the deformation process of T-stub flanges with preloaded bolts have been completed by Efthymiou [ 9 ], De Matteis et al [ 10 ], Šliseris et al [ 11 ], and Yuan et al [ 12 ]. 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 ].…”

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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Section: Introductionmentioning

confidence: 99%

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

2021

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“…Depending on the modulus of elasticity, there are hard, semi-hard and soft gaskets. The influence of a gasket on the required bolt preload is discussed in numerous papers in the scientific literature [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

On the Influence of Additional Axial and Bending Loads on Fatigue Life of Preloaded Bolts

Okorn¹,

Nagode²,

Klemenc³

et al. 2021

Prime Archives in Material Science

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The fatigue life of preloaded bolts depends on the additional dynamic loading of the bolts, which depends on the size and location of the working force application. Due to the eccentricity of the working force, there is an additional bending load on the bolts, which has a significant effect on fatigue. In this study, the influence of the additional axial and bending load of bolts on fatigue is investigated analytically, numerically and experimentally for four different flange joints. Comparison of the results shows that the analytical method overestimates the additional bolt stresses at low working load, mainly due to the extremely large contribution of bending stress. As the working load increases, the differences between the two methods decrease, but only for the reason that the analytical method can only linearly scale the overestimated results at lower working load, whereas the FEM analysis shows a progressive increase of the additional stress in the bolt at higher working loads due to the spreading of the flange. Experimental verification confirmed that the FEM analysis can be considered as a reference method. By using a high washer, the critical point of the bolt is shifted from the first contact of the bolt thread with the nut thread to the transition of the shank to the bolt head. The reduced notch effect and larger cross-section at this point greatly increases the fatigue life of the bolt.

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“…− models of the joint, in which the contact layer between the joined elements is not taken into consideration [1], − linear contact models with constant values of the contact stiffness coefficients over the entire nominal contact surface, commonly available in commercial finite element analysis systems [9,10,12,20,21,24,31,33,38,42], − non-linear contact models [5,7,13,51]. In the above-mentioned models, the possibility of taking into account the variable contact stiffness coefficients for each of the contact elements on the contact surface is not considered, which would be useful in the case of the contact analysis of the elements joined in a connection model with the experimentally defined stiffness characteristics of the contact layer between them [16].…”

Section: Introductionmentioning

confidence: 99%

Finite Element Modelling of a Pair of Flexible Elements Contact Preloaded and Externally Loaded with an Arbitrary Force

Grzejda¹

2020

Adv. Sci. Technol. Res. J.

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In the paper, the numerical tests of the contact of a pair of flexible elements were presented. The non-linear phenomena occurring in the contact zone of two elements have been considered separately for the assembly and operational condition of the joint. The physical and mathematical models of the contact joint created using the finite element method were proposed. The contact joint is treated as a system composed of the subsystems: two of them are joined elements and the third one is the contact layer between the elements. The calculations results for the selected contact joint were given.

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The elastic serrated gasket of the flange bolted joints

Cited by 28 publications

References 3 publications

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

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

On the Influence of Additional Axial and Bending Loads on Fatigue Life of Preloaded Bolts

Finite Element Modelling of a Pair of Flexible Elements Contact Preloaded and Externally Loaded with an Arbitrary Force

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