Unimportance of geometric nonlinearity in analysis of flanged joints with metal-to-metal contact

Joshi, Dhananjay; Mahadevan, Pradeep; Marathe, Amol; Chatterjee, Anindya

doi:10.1016/j.ijpvp.2007.03.004

Cited by 9 publications

(4 citation statements)

References 3 publications

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“…The model pipeline fragment rested on two supports: a right fixing support and a left displacement support. In order to induce variable pipeline loads (bending), the left flange was tightly fitted in a metal ring, which was then connected with the head (8), in turn making a part of the hydraulic cylinder act as a forced generator. In order to identify the value of the bolt's tension, TFpxy-4/350-type foil strain gauges were placed on each bolt and then connected to form a full bridge set-up.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The authors of paper [6] analysed the impact of mesh compaction within the contact surface area of a gasket with a flange-raised face in order to check the accuracy of the numerical solution. Papers [7,8] considered the impact of the non-linear characteristics of the gasket material on the bolt load condition. It was discovered that the tension was distributed more uniformly in joints with more rigid gaskets.…”

Section: Introductionmentioning

confidence: 99%

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Methodology of Leakage Prediction in Gasketed Flange Joints at Pipeline Deformations

et al. 2022

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The paper presents the proposal of a leakage prediction method in flange joints, after pipeline deformation, based on FEM (Finite Element Methods). The stages of developing the design are discussed, and a complex, multi-stage method of applying the loads is presented in detail. Moreover, the gasket material data obtained in experiments were used. The paper also presents the results of calculations on a non-uniform stress distribution in the radial direction of the gasket. In addition, it has been shown that the deflection of the pipeline with a minor displacement causes an increase in the diversification of the circumferential pressure of the gasket, and also has a significant influence on the determination of the actual state of stress to which the gasket is subject. Moreover, it was found that the distribution of contact pressure on the deflection of the pipeline has a significant influence on the level of leakage. The results of tests are compared to the results of the numerical calculations of the stress in bolts. By comparing the bolt tension changes obtained by numerical and experiment analyses, it has been shown that the assumptions made in developing the numerical model are correct.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Methodology of Leakage Prediction in Gasketed Flange Joints at Pipeline Deformations

et al. 2022

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“…The stiffness of bolted joints was investigated in [54][55][56][57][58] and the bolt self-loosening was examined in [59][60][61]. Recent analyses of flanged joints have proposed FE simulations to investigate the contact pressure distributions between the two flange mating surfaces [2,10,62]. By following the guidelines derived from the literature, a parametric FE model was implemented.…”

Section: Finite Element Model Validationmentioning

confidence: 99%

“…This flange is usually called gasketless, or metal-to-metal, and the leakage of the pressurized fluid inside the vessel is prevented by the bolt preload. Bolted flanges have been widely investigated, however most studies are limited to the compact geometry design for connecting pipes [2][3][4][5][6][7][8][9][10][11][12][13], while others are dedicated to the deformation behavior of the gasket [14][15][16][17][18][19][20]. Research on flanges is usually focused on the structural stiffness, stress distributions, and the strength optimization of the flange parts, under bolt preload and internal pressure or other external loadings [2,3,[6][7][8][9][10][11][12]18,[21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%