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Development of a Bellows Design Software Based on EJMA  

Koh, Byung-Kab (인하공업전문대학 기계과)
Publication Information
Transactions of the Korean Society of Machine Tool Engineers / v.17, no.1, 2008 , pp. 150-157 More about this Journal
Abstract
Bellows are commonly used in piping systems to absorb expansion and contraction in order to reduce stress. Unlike most piping components, bellows consist of a thin-walled shell of revolution with a corrugated meridian, in order to provide the flexibility needed to absorb mechanical movements. It is a composite shell structure consisting of at least one toroidal shell, an annular plate or conical shell. It is difficult to analyze the behavior of bellows because of its complex geometry. Simplified formulas for variable mechanical behaviors of bellows are provided by a standard called EJMA. An automatic design software for bellows is programming by using VBA(Visual Basic for Application) based on EJMA. Bellows engineers can effectively make a decision for bellows geometries because this software provides graphically design results in its post-processor. Bellows design software is expected to give quite a good guidance to practical design. The characteristics of bellows are also investigated through the automatic design process in bellows design software.
Keywords
EJMA(Expansion Joint Manufacturer Association); Flexible Shell; Bellows; Convolution; Column Squirm; In-plane Squirm;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Koh, B. K., 1995, 'A Top-Down Approach Design Methodology for Mechanical Systems with Bellows,' A Thesis for a Doctorate, Hanyang University
2 Ryu, H. C., 2004, Excel 2003 Macro and VBA, YoungJin.com
3 Tsukimori, K., 1984, 'Fatigue and Creep -Fatigue Life Evaluation of U-shaped Bellows,' ASME, Journal of Pressure & Vessels Technology, Vol. 114, pp. 280-291
4 Koh, B. K. and Park, G. J., 1998, 'Analysis and Optimization of Bellows With General Shape,' ASME, Journal of Pressure Vessel Technology, Vol. 120, pp. 325-333   DOI
5 Kwon, H. U., 2004, Excel Using VBA, Digital Books Publishing Co., Ltd
6 Rha, W. Y., Kim, M. and Oh, Y. S., 2004, 'A Study on Structural Analysis of Bellows for Automotive,' Transactions of the Korean Society of Machine Tool Engineers, Vol. 13, No. 6, pp. 102-106
7 Expansion Joint Manufacturers Association, Inc., 1993, Standards of the Expansion Joint Manufacturers Association, Sixth Edition
8 Koh, B. K. and Park G. J., 1995, 'Design of an Automobile Exhaust System using a Top-Down Approach Design Methodology,' International Journal of Vehicle Design, Vol. 17, No. 3, pp. 276-294