Strength of DT Tubular Joints with Brace and Chord Compression

Kang, Cheol-Kyu; Moffat, D. G.; Mistry, J.

doi:10.1061/(asce)0733-9445(1998)124:7(775)

Cited by 19 publications

(6 citation statements)

References 3 publications

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“…10. Convergence studies, supported by previous work by the present authors [14], showed that two elements through the thickness in the region of the junction was acceptable and gave a balance between efficient computing time and reliable results.…”

Section: Finite Element Modellingsupporting

confidence: 78%

Limit loads for knuckle-encroaching nozzles in torispherical heads: Experimental verification of finite element predictions

Hsieh

Moreton

Mistry

et al. 2002

The Journal of Strain Analysis for Engineering Design

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The manufacturing and testing procedures for two experimental pressure vessels with large nozzles encroaching into the knuckle region of the vessel head are described. Experimental linear elastic stress levels and plastic loads for pressure and combined axial and in-plane bending nozzle loads are compared with predicted values determined using non-linear finite element analysis. The quality of the results are considered to justify the procedures developed by the authors to conduct a parametric study of the individual limit loads and their interaction for these complex structures.

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Section: Finite Element Modellingsupporting

confidence: 78%

Limit loads for knuckle-encroaching nozzles in torispherical heads: Experimental verification of finite element predictions

Hsieh

Moreton

Mistry

et al. 2002

The Journal of Strain Analysis for Engineering Design

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“…상용 유한요소해석 소프트웨어인 ABAQUS 6.14 [15] [16], [17] . 가 20을 넘 어서면 주관 양단 구속조건의 영향 또한 받지 않는 것으로 알 려져 있다 [18] .…”

Section: 해석모델 수립 및 검증unclassified

Numerical Study of High-strength Steel CHS X-joints Including Effects of Chord Stresses

Kim¹,

Lee²

2018

kjoss

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Internationally representative steel design standards have forbidden or limited the application of high-strength steels to tubular joints, partly because of concerns about their unique material characteristics such as high yield ratio. Most of design standards stipulate that for steels whose yield strengths exceed 355 or 360 MPa, the strength equations cannot be utilized or strength reduction factor below 1.0 should be multiplied. However, the mechanical background behind these limitations is not clear. Experimental testing of high-strength steel CHS (circular hollow section) X-joints recently conducted by the authors also clearly indicated that the current limitations might be unduly conservative. As a continuing work, extensive, test-validated numerical analyses were made to investigate the behavior of high-strength steel CHS X-joint under axial compression. Three steel grades covering ordinary to very high strength steels were considered in the analysis. Again it was found that the high strength penalty to the joint strength in current standards is too severe and needs to be relaxed. The high-strength steel joints under the effects of chord stress generally showed higher strength than the ordinary steel joints and their strengths were conservatively predicted by current standards. It is also emphasized that current format of the CHS X-joint strength equation does not reflect observed behavior and needs to be recast.

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“…The numerical simulation and test results showed that the ultimate adimensional load increases in term of adimensional loads ratio applied in chord and braces. We note that the results of the numerical simulation are conservative [6]. The influence of longitudinal gap parameter and chord thickness ratio to elastoplastic behaviour for DK-joint under antsymmetrical tensile has been analysed [7].…”

Section: Bibliographic Studiesmentioning

confidence: 99%

“…Also, it has been proven that the propagation mode of the plastic region is almost the same. A comparative study of elastoplastic behaviour of DT-joint has been performed [6]. This joint is subjected to compressive loading applied simultaneously to the free ends of chord and two braces.…”

Section: Bibliographic Studiesmentioning

confidence: 99%

Elastoplastic behaviour of T, Y, DT and DY-tubular joints under axial loading

Jalal¹

2012

IOSRJMCE

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The offshore tubular structures are composed of beam elements which the intersecting areas present structural discontinuities. So, a high stress concentration appears in these areas, particularly, in the hot spots points. In this study, the finite element method (FEM) is applied on welded tubular T, Y, DT and DY-joints, in order to visualise the elastic stress distribution in the vicinity of the weld toe, and record the plastic limit load of each form. The aim of this work is to compare the elastic and elastoplastic behaviours, firstly, between T and Y tubular join, then, repeated this study for DT and DY joints. For elastic study, the evolution of von Mises equivalent stress along the weld toe was compared, knowing that the axial loads are applied in the free ends of the all braces. For nonlinear investigation, a comparison of tensile loads limits (collapse load) of these joints was realised, knowing that a tensile proportionally load is applied in the free ands of the braces. The mesh and the numerical calculation are performed using, respectively, Patran and Nastran software.

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Strength of DT Tubular Joints with Brace and Chord Compression

Cited by 19 publications

References 3 publications

Limit loads for knuckle-encroaching nozzles in torispherical heads: Experimental verification of finite element predictions

Limit loads for knuckle-encroaching nozzles in torispherical heads: Experimental verification of finite element predictions

Numerical Study of High-strength Steel CHS X-joints Including Effects of Chord Stresses

Elastoplastic behaviour of T, Y, DT and DY-tubular joints under axial loading

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