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RESEARCH PAPERS: Offshore Mechanics

Stress Concentrations in T/Y and K Square-to-Square and Square-to-Round Tubular Joints

[+] Author and Article Information
A. K. Soh

School of Mechanical and Production Engineering, Nanyang Technological University, Singapore, Republic of Singapore

C. K. Soh

School of Civil and Structural Engineering, Nanyang Technological University, Singapore, Republic of Singapore

J. Offshore Mech. Arct. Eng 114(3), 220-230 (Aug 01, 1992) (11 pages) doi:10.1115/1.2919974 History: Received May 09, 1991; Revised January 21, 1992; Online June 12, 2008

Abstract

A parametric stress analysis of T/Y and K square-to-square and square-to-round tubular joints subjected to axial loads, in-plane and out-of-plane bending moments has been performed using the finite element technique in order to provide a sound basis for using such sections in the design of complex structures. The results of this analysis are presented as a set of 42 equations expressing the stress concentration factor as a function of the relevant geometric parameters for various loading conditions. A comparison is made between the results obtained for square-to-square and square-to-round tubular joints and those obtained for round-to-round tubular joints by other researchers. In general, the stress concentration factors obtained from round-to-round and square-to-round tubular joints are closer as compared with those of the corresponding square-to-square tubular joints. Moreover, the stress concentration factors for square-to-square tubular joints are generally lower than those of the corresponding round-to-round and square-to-round tubular joints when the joints are subject to axial loads; but the reverse is true when the joints are subject to in-plane bending moments. However, the stress concentration factors for the three types of joint are comparable when they are subject to out-of-plane bending moments.

Copyright © 1992 by The American Society of Mechanical Engineers
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