Best Level of Parameters for a Critical Buckling Load for Circular Thin- Walled Structure Subjected to Bending

  • Hussein M. H. Al-Khafaji Department of Mechanical Engineering/ University of Technology/ Baghdad

Abstract

Circular thin walled structures have wide range of applications. This type of structure is generally exposed to different types of loads, but one of the most important types is a buckling. In this work, the phenomena of buckling was studied by using finite element analysis. The circular thin walled structure in this study is constructed from; cylindrical thin shell strengthen by longitudinal stringers, subjected to pure bending in one plane. In addition, Taguchi method was used to identify the optimum combination set of parameters for enhancement of the critical buckling load value, as well as to investigate the most effective parameter. The parameters that have been analyzed were; cylinder shell thickness, shape of stiffeners section and the number of stiffeners. Furthermore, to verify the contribution of parameters on buckling response, the analysis of variance technique (ANOVA) method was implemented, which gave the contribution weight as percentages. The analysis of results by these two methods showed that the more effective parameter on the critical buckling load was the thickness of cylinder’s shell and the lowest effective was the number of stiffeners The values of parameters that gave the best critical buckling load combination were: 1) the ratio of cylinder’s diameter to thickness of its shell was 133, 2) the ratio of the depth to thickness of stiffeners was1.6, and 3) the number of stiffeners was 12.

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References

L. Guo, S. Yang, and H. Jiao, “Behavior of thin-walled circular hollow section tubes subjected to bending,” Thin-Walled Struct., vol. 73, pp. 281–289, 2013.

T. P. Peterson, “Bending Tests of Ring Stiffened Circular Cylinders,” 1956.

J. Singer, “The Influence of Stiffener Geometry and Spacing on the Buckling of Axially Compressed Cylinderical and Conical Shells,” Technion-Israel Institute of Technology, 1967.

N. T. Phuong and D. H. Bich, “Buckling analysis of eccentrically stiffened functionally graded circular cylindrical thin shells under mechanical load,” vol. 29, no. 2, pp. 55–72, 2013.

D. Huy, D. Van Dung, V. Hoai, and N. Thi, “Nonlinear static and dynamic buckling analysis of imperfect eccentrically stiffened functionally graded circular cylindrical thin shells under axial compression,” Int. J. Mech. Sci., vol. 74, pp. 190–200, 2013.

M. Shariati and A. Akbarpour, “Buckling and Post Buckling Investigation of Thin Walled Shells Contain Elliptical and Circular Cutout , Subjected to Oblique Loading,” vol. 2, no. 9, pp. 9548–9557, 2012.

C. A. Dimopoulos and C. J. Gantes, “Thin-Walled Structures Experimental investigation of buckling of wind turbine tower cylindrical shells with opening and stiffening under bending,” Thin Walled Struct., vol. 54, pp. 140–155, 2012.

H. Reyno, J. Park, and Y. Kang, “Influence of Door Opening and Collar Stiffener on the Buckling Capacity of Cylindrical Wind Tower,” vol. 8, no. October, pp. 1–7, 2015.

B. D. Reddy, “An Experimental Study of The Plastic Buckling of Circular Cylinders in Pure Bending,” Int. J. Solids Struct., vol. 12, pp. 669–683, 1979.

H. Jiao and X. L. Zhao, “Section slenderness limits of very high strength circular steel tubes in bending,” Thin-Walled Struct., vol. 42, no. 9, pp. 1257–1271, 2004.

P. C. Khonke and W. C. Schnobrich, “A Finite Element Analysis of Eccentrically Stiffened Ciruclar Cylindrical Shells,” Urbana, Illinois, 1969.

S. E. Kim and C. S. Kim, “Buckling strength of the cylindrical shell and tank subjected to axially compressive loads,” Thin-Walled Struct., vol. 40, no. 4, pp. 329–353, 2002.

N. N. Thakre and D. V Bhope, “Investigation of Stresses in Ring Stiffened Circular Cylinder,” no. 9, pp. 97–101, 2014.

A. T. Tran, M. Veljkovic, and C. Rebelo, “Buckling Observation of Door Openings for Wind Turbine Towers,” no. September, pp. 4–11, 2015.

V. Polenta, S. D. Garvey, D. Chronopoulos, A. C. Long, and H. P. Morvan, “Optimal internal pressurisation of cylindrical shells for maximising their critical bending load,” Thin-Walled Struct., vol. 87, pp. 133–138, 2015.

L. Gangadhar and T. S. Kumar, “Finite Element Buckling Analysis of Composite Cylindrical Shell with Cutouts Subjected to Axial Compression,” vol. 89, pp. 45–52, 2016.

O. Lykhachova, “Numerical Simulation of Axially Compressed Cylindrical Shells with Circular Cutouts,” vol. 20, no. 3, pp. 309–320, 2016.

A. Khamlichi, J. El Bahaoui, L. El Bakkali, M. Bezzazi, and A. Limam, “Effect of Two Interacting Localized Defects on the Critical Load for Thin Cylindrical Shells Under Axial Compression,” Am. J. Eng. Appl. Sci., vol. 3, no. 2, pp. 464–469, 2010.

A. Khamlichi and A. Limam, “Assessing the Effect of Two Entering Triangular Initial Geometric Imperfections on the Buckling Strength of an Axisymmetric Shell subjected to Uniform Axial Compression,” in Proceedings of the Eleventh International Conference on Computational Sructures Technology, 2012, pp. 1–11.

R. D. Cook, Finite Element Modeling for Stress Analysis. New York: John Willy and Sons, Inc., 1995.

A. H. Suri, “A study of structure stability using the finite element method and minimum weight design of composite panel,” University of Glasgow, 1983.

M. S. Phadke, “Quality Engineering Using Robust Design.” P T R Pentice Hall, Englewood Cliffs, New Jersey, 1989.

J. Lin and K. Lee, “Optimization of Bending Process Parameters for Seamless Tubes Using Taguchi Method and Finite Element Method,” Adv. Mater. Eng., vol. 2015, 2015.

Rupert G. Miller, “Beyond ANOVA, Basics of Applied Statistics.” John Wiley & Sons, Inc., Canada, 1986.

L. Jiang, Y. Wang, and X. Wang, “Buckling analysis of stiffened circular cylindrical panels using differential quadrature element method,” Thin-Walled Struct., vol. 46, no. 4, pp. 390–398, 2008.

Published
2019-03-18
How to Cite
Al-Khafaji, H. (2019). Best Level of Parameters for a Critical Buckling Load for Circular Thin- Walled Structure Subjected to Bending. Al-Khwarizmi Engineering Journal, 13(4), 12- 21. https://doi.org/10.22153/kej.2017.07.003