18th International Conference on Structural Mechanics in Reactor Technology (SMiRT 18) Beijing, China, August 7-12, 2005 SMiRT18-F07-4 Copyright © 2005 by SMiRT18 APPLICATION OF FEM ANALYSIS METHODS TO A CYLINDER-CYLINDER INTERSECTION STRUCTURE Liping XUE Center for Joining and Manufacturing Assembly Marquette University Milwaukee, WI 53233, USA Phone: 01-414-933-2903 E-mail: [email protected] G.E.O. WIDERA Center for Joining and Manufacturing Assembly Marquette University Milwaukee, WI 53233, USA Phone:01-414-288-3543,Fax: 414-288-1647 E-mail:[email protected] Zhifu SANG Department of Mechanical and Power Engineering Nanjing University of Technology Nanjing, Jiangsu 210009, China Phone: 01186-25-83240932 E-mail: [email protected] ABSTRACT The objective of this paper is to study a particular cylindrical shell intersection (d/D=0.526) by use of both linear elastic and elastic-plastic stress analyses via the finite element method using the FEA software ANSYS. The former mainly focuses on the calculation of the stress concentration and flexibility factors in the intersection area before the structure experiences plastic behavior. When an elastic-plastic analysis method is employed, the limit load and burst pressure need to be determined. In this study, two different methods, the “double elastic-slope method” and the “tangent intersection method” are both employed to determine the limit pressure. To predict the burst pressure and failure location, the “arc-length method” in ANSYS is used to solve the nonlinear problem. Finally, the FEA results are compared to experimental data and the agreement is shown to be good. Keywords: Stress concentration factor, flexibility factor, limit pressure, burst pressure 1. INTRODUCTION Cylindrical shell intersections are structural configurations commonly used in many industries. The action of various loads leads to high local stresses in the intersection region resulting in stress concentrations there. In addition, due to difficulties that may arise during welding and the resulting defects, the intersection region then becomes the weakest point and failure source of the whole structure. Thus, it is very important to be able to accurately obtain the magnitude and location of stresses and strains so as to allow one to examine the failure modes of these structures. Stress analysis methods for cylindrical shell intersections fall into two areas: linear elastic analysis and elastic-plastic analyses. As far as the linear elastic analysis is concerned, the stress intensity and flexibility 1329
APPLICATION OF FEM ANALYSIS METHODS TO A CYLINDER-CYLINDER INTERSECTION STRUCTURE
Jun 14, 2023
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Related Documents
