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4 edition of Stress concentrations in tubular T-joints found in the catalog.

Stress concentrations in tubular T-joints

N D P. Barltrop

Stress concentrations in tubular T-joints

an extension of the ring analogy

by N D P. Barltrop

  • 191 Want to read
  • 24 Currently reading

Published by CIRIA, Underwater Engineering Group in London .
Written in English


Edition Notes

Statement[by] N.D.P. Barltrop, R.S. Lamb.
SeriesTechnical notes -- 15.
ContributionsLamb, R S.
The Physical Object
Pagination20p.
Number of Pages20
ID Numbers
Open LibraryOL21459987M
ISBN 100860170853
OCLC/WorldCa85086976

The present article is dedicated to study of the effects of different parameters of fiber reinforced polymers (FRP), as strengthening material, on a tubular T-joint subjected to brace axial loading using finite element analyses. The effectiveness of FRP materials on enhancing the fatigue life of tubular T-joints was investigated through computing the ratio of the stress concentration factors.   The present paper offers a comprehensive study on stress concentrations in welded tubular steel gap K-joints and its implications on fatigue design. After presenting an extensive overview of the relevant literature, finite element results of stress concentration factors (SCFs) are reported and evaluated for various loading conditions. Emphasis is given to the SCF location as well as to the so.   Experimental work was carried out to determine the fracture behaviour of welded tubular T-joints made of high strength TMCP-steel. Besides the load parameters, the crack profiles along the crack front were determined for the T-joints as well as for small SE(B)-specimens at different applied loads. This gave a direct information on the crack driving force. The aim of this work––which was. N D P. Barltrop has written: 'Stress concentrations in tubular T-joints' Asked in TV Shows and Series What are the release dates for Codename Kids Next Door - Operation D-O-G--F-I-G-H-T.


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Stress concentrations in tubular T-joints by N D P. Barltrop Download PDF EPUB FB2

Stress concentrations in simple tubular joints Introduction Typical offshore structures are composed of three dimensional frames fabricated from steel tubulars. The connections between the different tubular members are denoted tubular joints.

A tubular joint is made up of a chord (element of largest diameter) and one or more Size: KB. In off shore structures stress concentrations usually occur at the intersections of tubular members (i.e., tubular joints). For some joints, the stress concentration can produce a maximum stress at the intersection as high as 20 times the nominal stress acting in the members.

Stress concentrations have aggravated the fatigue of tubular joints in many existing offshore by: stress concentrations in t/y and gap/overlap k-joints The fatigue analysis of offshore platforms requires accurate knowledge of the stress concentrations at tubular intersections.

In this paper parametric equations are presented for estimating stress concentration factors (SCFs) in tubular T/Y and K-joints with emphasis on Stress concentrations in tubular T-joints book joints Cited by: INTERNATIONAL JOURNAL OF COASTAL & OFFSHORE ENGINEERING JCOE No.

1/ Winter () 1 Stress Concentration Factors in FRP Strengthened Tubular T-joints Under Brace In-Plane Bending and Out-of-Plane Bending Moments Alireza Sadat Hosseini1*, Mohammad Reza Bahaari2, Mohammad Lesani3 1PhD Candidate, University of Tehran; @ This paper has presented a comprehensive investigation of stress concentrations in tubular steel gap K-joints.

The work was based on an extensive finite element parametric study, which investigated stress distributions within K-joints under various loading conditions and for a wide range of joint by: Stress Concentration Factors of Doubler Plate Reinforced Tubular T Joints.

The aim of this paper is to study the stress concentration factors of doubler plate reinforced tubular T joints subjected to various types of basic loading such as Stress concentrations in tubular T-joints book tension, axial compression, and in-plane and out-of-plane bending.

Consequently, the ability to assess the magnitude of the stress concentration is a Prerequisite to dealing with the fatigue problem of tubular joints. This paper deals with the problem of computing the stress concentration in three types of simple, nonreinforced joints: T-joints, K-joints, and TK-joints.

In the s with the increasing development of the hot-spot stress S-N approach to nodal joint fatigue life estimation, it became clear that the determination of reliable stress concentration factors (SCFs) for tubular joints was fundamental to this concept. The first parametric SCF equations covering simple tubular joints were.

14 Ghanameh MF, Thevenet D, Zeghlou A. Stress concentration in offshore welded tubular joints subjected to combined load. Journal of Materials Science and Technology.

; [ Links ] 15 Thandavamoorthy Stress concentrations in tubular T-joints book. Experimental and numerical investigations on unstiffened tubular T-joints of offshore by: 1.

Stress Concentrations in T/Y and Gap/Overlap K Joints, in: Proceedings of the Conference on Behaviour of Offshore Steel Structures, Delft, Elsevier Science Cited by: Correct stress concentration factors (SCFs) for tubular joints are of significant importance when calculating hot spot stresses for fatigue life analysis of tubular frame structures such as jacket structures used for exploitation of petroleum by: 7.

The parameter β was found to have different effects on the stress distribution for tubular T and K joint. Chen et al. investigated the stress concentration phenomena in concrete filled tubular T joints subjected to axial loads and in-plane bending.

Five concrete filled tubular T joint along with three hollow tubular T joints were by: Stress Concentration Factors of Cold Formed Stainless Steel Tubular X-joints R Feng a studied the fatigue behaviour of welded aluminium RHS T-joints based on both fatigue The stress concentrations related to the welding fabrication and local condition of the weld toe will not be taken intoFile Size: 1MB.

Stress concentrations aggravate the fatigue of tubular joints in many existing offshore structures. For this reason, accurate computation of stress concentration is very important in tubular.

Part III ural Engineering Conference Wisconsin 4 N. Maddox Fatigue analysis for deepwater fixed bottom platforms O.T.C. Paper No 5 A. Bull, and R. Walker Stresses experienced by an offshore mobile drilling unit O.T.C.

Paper No. 6 J. Kuang Stress concentrations in tubular joints O.T.C. Paper No. Stress Concentrations In Tubular Joints Welded From One Side Authors Morten Baerheim Document ID ISOPE-I Publisher International Society of Offshore and Polar Engineers Source The Sixth International Offshore and Polar Engineering Conference, May, Los Angeles, California, USA Cited by: 1.

For the modeling of stainless steel tubular T-joints, the top end of brace member and the loaded end at the bottom supporting plate were restrained against all degrees of freedom, except for the displacement at the loaded end in the direction of the applied load. The nodes other than the loaded end and the top end were free to translate and rotate in any directions.

tubular structures (Ref. 2) are used at the ends of the branch members. Although the complete stress picture is much more complex, the concept of punching sffear, Fig. 2, has been quite useful in correlating test data and formulating design criteria.

The average (or nominal) punching shear stress File Size: KB. The stress concentration factor for the inside of the member was also computed; it is found that it can be close to the stress concentration factor at the weld toe for both the in plane or out of plane bending modes. INTRODUCTION.

A large number of offshore structures are. constructed with. a lattice construction, where tubular members are welded.

Baerheim reported on stress concentrations in single sided welds, obtained using finite elements (FE), in axially loaded K-joints and found that some geometries produced high R by: The aim of this paper is to study the stress concentration factors of doubler plate reinforced tubular T joints subjected to various types of basic loading such as axial tension, axial compression.

A parametric stress analysis of DT/X 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 by: 7.

Stress concentration factors of cold-formed stainless steel tubular X-joints Article in Journal of Constructional Steel Research December with 55 Reads How we measure 'reads'. stress analysis of reinforced tubular joints subjected to different load types.

Authors: A K SOH, C K SOH, K H HOON, AI KAH SOH, CHEE KIONG SOH, KAY HIANG HOON Source: Proceedings of the Institution of Civil Engineers - Structures and Buildings, VolumeIssue 3, 1 Aug (–)Cited by: Request PDF | Stress and Strain Concentration Factors of Completely Overlapped Tubular K(N) Joints | A full-scale uniplanar completely overlapped tubular K(N) joint specimen is tested to determine.

proposed for the shear stiffness and maximum shear stress in round tubular members. where σxθis the shear stress in the circumferential direction of the cross-section andτmax is the largest shear stress (Fig. In fact it can be shown that this is the exact distribution of the shear stress usingFile Size: KB.

The 8-node iso-parametric thin shell element was employed in the study of stress concentrations in the welded tubular “K” joint. Element equilibrium equations were derived using isoparametric formulation based on thin shell theory.

After assembly, the resulting system equations were solved using existing fortran programs. Numerical experiments were conducted to isolate and locate ideal gap Cited by: 2. Fatigue Design of Marine Structures - by Inge Lotsberg April A Parametric Study of the Ratio of Bending to Membrane Stress in Tubular Y- and T-Joints.

International Journal of Fati 3– Cremona, C. Stress Concentrations in Single-Sided Welds in Offshore Tubular Joints. Offshore Technology Report, HSE. The fatigue life of tubular joints with many braces, e.g., DK and DTK joints, are commonly determined by treating them as tubular joints with less braces, e.g., T/Y, K, and X joints, based on the joint classification approach recommended by the American Petroleum by: 1.

Abstract. Parametric equations developed earlier for stress concentration factors (SCF) and strain concentration factors (SNCF) for tubular joints are mainly dependent upon the increase in stress and strain due to geo-metric, notch and weld by: 1.

Stress concentration factors (SCFs) in a T and a K-T tubular joint have been determined using the finite element method (FEM).

The SCFs are determined for basic load cases (axial load or bending moment) in one of the braces or in the chord. The results of the FEM are compared with available experimental data and with parametric by: 5. Stress concentration factors for the fatigue design of tubular flange connections Maël COUCHAUX 1,2, Ivor RYAN 1, Mohammed HJIAJ 2 1 Centre Technique Industriel de la Construction Métallique, France 2 Institut National des Sciences Appliquées de Rennes, France File Size: 1MB.

Single sided welds commonly used for connecting braces to chords in tubular joints for offshore structures are known to have failed from cracks initiated at the root of the weld. There is currently no common industry standard to assess the fatigue performance of single-sided welds and hence guidelines on this issue are urgently needed.

Fatigue assessment of single-sided welds requires Cited by:   The use of concrete filled circular hollow steel section (CFCHS) members in bridge design is a relatively new concept. In the design of recently constructed steel-concrete composite bridges using CFCHS truss girders for the main load carrying structure, the fatigue verification of the tubular spatial truss joints is a main issue.

This paper presents a comprehensive study on stress Cited by: In order to design a tubular joint to carry a larger load and to possess a longer life, the prime objective of design would be to reduce stress concentration factor at the intersection of the joint; one method to achieve the same is to stiffen the joint with internal ring by: Recent Research on Fatigue of Welded Tubular Joints Mashiri The thin-walled hollow section to plate T-joints were subjected to cyclic in-plane bending in the brace.

Figure 3 shows that failure of these types of joints occurs at the weld toes in the brace for both theFile Size: KB. Stress Concentrations in Tubular DT-Joints for Fatigue Design Journal of Structural Engineering November Bonded Sleeve Connections for Joining Tubular Glass Fiber–Reinforced Polymer Beams and Columns: Experimental and Numerical Studies.

Stress concentrations in square hollow section joints rectangular reduced resistance rotation shear shown in Figure shows side specimens standard steel stiffening stiffness strain strength stress T-joints Table temperature tension test results thickness tion truss tube Tubular Structures Tubular Structures IX: Proceedings of the Ninth 5/5(1).

RE: Stress Concentration in Aluminum T-Joints rb (Aerospace) 22 Feb 06 i wouldn't mind neglecting stress concentrations for a static analysis, 'cause the yielding that would occur would LIKELY be very localised and not affect the overal strength of the strcuture.

In previous research, the authors numerically investigated finite-element (FE) models of concrete-filled steel tubular (CFST) T-joints under axial force in the brace to derive formulae for stress concentration factors (SCFs).

Numerical studies on tubular joints using the finite element method have been going on for more than two decades. For instance, Lee [2] reviewed the modeling techniques used in the finite element analysis of tubular joints for obtaining information on strength, stress fields and stress Cited by: 1.Peterson's Stress Concentration Factors establishes and maintains a system of data classification for all of the applications of stress and strain analysis and expedites their synthesis into CAD applications.

Substantially revised and completely updated, this book presents stress concentration factors both graphically and with by: Book Description. Tubular Structures XVI contains the latest scientific and engineering developments in the field of tubular steel structures, as presented at the 16th International Symposium on Tubular Structures (ISTS16, Melbourne, Australia, December ).The International Symposium on Tubular Structures (ISTS) has a long-standing reputation for being the principal showcase for.