STRESS CONCENTRATION FACTORS IN THICK WALLED CYLINDERS WITH ELLIPTICAL CROSS-BORES

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dc.contributor.author Kihiu, J.M.
dc.contributor.author Adenya, C. A.
dc.date.accessioned 2012-09-24T12:07:03Z
dc.date.accessioned 2013-07-19T07:42:42Z
dc.date.available 2012-09-24T12:07:03Z
dc.date.available 2013-07-19T07:42:42Z
dc.date.issued 2010
dc.identifier.uri http://elearning.jkuat.ac.ke/journals/ojs/index.php/jscp/article/view/697/642
dc.identifier.uri http://hdl.handle.net/123456789/1535
dc.identifier.uri http://hdl.handle.net/123456789/707
dc.description Computer simulations were conducted to determine the elastic stress concentration factors in the vicinity of an elliptical cross-bore in a closed ended thick walled cylinder. en_US
dc.description.abstract Computer simulations were conducted to determine the elastic stress concentration factors in the vicinity of an elliptical cross-bore in a closed ended thick walled cylinder. The orientation of the elliptical cross-bore with respect to the meridional plane was varied. Various cross-bore to cylinder bore radius ratios and various geometries of the elliptical cross-bore were investigated. A three-dimensional finite element method (FEM) computer programme in FORTRAN code was developed and used to carry out the investigations. The displacement formulation was used. Cylinder geometries of thickness ratios k = 2.0, 2.25 and 2.5 were considered. Cylinder length was taken to be 9 times the wall thickness to avoid the end effects. The maximum stress concentration factor was experienced when the major axis of the elliptical cross-bore lay in the meridional plane. The minimum stress concentration factor was experienced when the major axis of the elliptical cross-bore lay in the transverse plane. For an elliptical cross-bore of cross-sectional area equivalent to that of a circular cross-bore of cross-bore to cylinder bore radius ratio of d = 0.15, the stress concentration factor (SCF) was a constant at 2.1 for angle of rotation (AOR) of 74.5°. For an elliptical cross-bore of crosssectional area equivalent to that of a circular cross-bore of d = 0.20, the SCF was a constant at 2.1 for AOR = 73°. For an elliptical cross-bore of cross-sectional area equivalent to that of a circular cross-bore of d = 0.25, the SCF was a constant at 2.1 for AOR = 72.5°. When the elliptical cross-bore had its major axis perpendicular to the cylinder axis the SCF was a minimum, i.e., 2.0 and below. The SCF for a circular cross-bore was 3.0. Therefore an elliptical cross-bore offered the lowest SCF when compared to a circular cross-bore. The information on SCF constants obtained will enable quick design of thick walled cylinders with elliptical crossbore. en_US
dc.description.sponsorship Department of Mechanical Engineering, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya en_US
dc.language.iso en en_US
dc.publisher JKUAT en_US
dc.subject Thick walled cylinder en_US
dc.subject elliptical cross-bore en_US
dc.subject stress concentration factor en_US
dc.subject finite element method en_US
dc.title STRESS CONCENTRATION FACTORS IN THICK WALLED CYLINDERS WITH ELLIPTICAL CROSS-BORES en_US
dc.type Article en_US


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