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http://dx.doi.org/10.14775/ksmpe.2020.19.10.052

A Study on the Behavioral Characteristics of Bellows for Expansion Joints  

Jeong, Doo-Hyung (Kyungdong Navien Co., Ltd, R&D Center)
Chin, Do-Hun (Dept. of Industrial Health, Catholic University of Pusan)
Kim, Byung-Tak (Dept. of Mechanical Design Engineering, Pukyong National University)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.19, no.10, 2020 , pp. 52-58 More about this Journal
Abstract
Bellows are corrugated mechanical elements used to absorb displacements or vibrations caused by temperature changes, pressure, earthquakes, waves, etc., which are welded to flanges or directly connected to pipes. Expansion joint bellows must not only be designed to sufficiently withstand the internal pressure of the pipes but also accommodate axial, transverse, and rotational deformations to minimize the transfer of forces to the sensitive components of the system. Bellows have various types of corrugations, but U-type bellows are most commonly used in general piping systems. In this study, the behavior of U-shaped one-, two-, and three-ply bellows with the same inner diameter under pressure and forced displacement was analyzed using the finite element method. The results were compared with the design formula in the Expansion Joint Manufacturers Association (EJMA)'s code. Manufacturer data were used for the applied pressure and force displacement. The behavioral characteristics of the three cases were compared via structural analysis because the stress levels will be different for each model, even if they have the same inner diameter. Since the analytical model has an axisymmetric shape but displacement occurs in the transverse direction, the finite element model was composed of 1/2 of the whole model, and ANSYS Workbench 17.2 was employed for the analysis.
Keywords
Expansion Joint; U-shaped Bellows; EJMA Code; Finite Element Method;
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  • Reference
1 Lee, W. S., "A Study on the Durability Evaluation Method of Bellows type expansion pipe joints," A Thesis for a Master Degree, University of Incheon, Republic of Korea, 2018.
2 Han, M. S., Ahn, J. H. and Yang, C. H., "Study on Optimum Shape of Expansion Joint," Transaction of the Korean Society of Automotive Engineers, Vol. 21, No. 2, pp. 154-158, 2013.   DOI
3 Kim, H. J., Kim, H. S., Han, K. T. and Jeon, W. Y., "Optimum Design of Ships Bellows Using R.S.M.," Proceedings of the KSMPE Conference, pp. 349-352, 2008.
4 Kim, H. J., Park, J. H., Kim, H. S., Sung J. H., Kim H. G. and Lee, J. S., "A Study on Design of U-type Bellows," Proceedings of the KSMTE Conference, pp. 319-324, 2006.
5 Ko, B. G., Suh, Y. J. and Park, K. J., "A Finite Element Analysis and Shape Optimal Design with Specified Stiffness for U-typed Bellows," Transaction of the Korean Society of Automotive Engineers Vol. 3, No. 6, pp. 96-111, 1995.
6 Jeong, D. H., Chin, D. H., Kim, J. D., Yoon, M. C. and Kim, B. T., "A Study on the Behavior of 3-Ply Bellows," Proceedings of the KSMPE Conference, pp. 84-84, 2019.
7 Expansion Joint Manufacturers Association, Inc., Standards of the Expansion Joint Manufacturers Association, Ninth Edition, 2008.
8 Koh, B. K., "Development of a Bellows Design Software Based on EJMA," Journal of the Korean Society of Manufacturing Technology Engineers Vol. 17, No. 1, pp. 150-157, 2008.
9 Lee, Y. S., Yoon, K. S. and Kim, T. W., "A Study on the Analysis of the Natural Frequencies and the Development of the Simplified Formulas for Bellows," Journal of Korean Society for Noise and Vibration Engineering, Vol.9, No. 2, pp. 331-339, 1994.
10 Kim, H. J., Kim, H. S., Kim, J. P., Park, J. H. and Yun, M. J., "Shape Optimization for Performance Improvement of Ship's U-type Bellows," Journal of Ocean Engineering and Technology, Vol. 20, No. 6, pp. 123-129, 2006.
11 Budynas, R. G., Advanced Strength and Applied Stress Analysis(2nd ed.), McGraw-Hill, pp. 302-309, 1999.
12 Lee, S. W. and Yang, C. H., "Automated Modeling and Structure Analysis of Bellows," Transaction of the Korean Society of Automotive Engineers. Vol. 22, No. 7, pp. 152-157, 2014.   DOI