Stress concentration factors and fatigue behavior of square bird-beak SHS T-joints under out-of-plane bending

Cheng, Bin; Qi, Qian; Zhao, Xiao Ling

doi:10.1016/j.engstruct.2015.05.033

Cited by 20 publications

(2 citation statements)

References 20 publications

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“…On the other hand, in the recent studies some researchers have investigated in detail the concertation of the stress and its distribution in critical areas [18][19][20][21][22][23], where Lostsberg [18], Osawa et al [19] and Lotfollahi-Yagin et al [20] have focused on the stress hot spots in tubular joints, whereas, Cheng et al [21] investigated how the concertation of the stress affect the fatigue.…”

Section: Introductionmentioning

confidence: 99%

Trustworthiness in Modeling Unreinforced and Reinforced T-Joints with Finite Elements

Ouakka

Fantuzzi

2019

MCA

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As required by regulations, Finite Element Analyses (FEA) can be used to investigate the behavior of joints which might be complex to design due to the presence of geometrical and material discontinuities. The static behavior of such problems is mesh dependent, thus these results must be calibrated by using laboratory tests or reference data. Once the Finite Element (FE) model is correctly setup, the same settings can be used to study joints for which no reference is available. The present work analyzes the static strength of reinforced T-joints and sheds light on the following aspects: shell elements are a valid alternative to solid modeling; the best combination of element type and mesh density for several configurations is shown; the ultimate static strength of joints can be predicted, as well as when mechanical properties are roughly introduced for some FE topologies. The increase in strength of 12 unreinforced and reinforced (with collar or doubler plate) T-joints subjected to axial brace loading is studied. The present studies are compared with the literature and practical remarks are given in the conclusion section.

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Section: Introductionmentioning

confidence: 99%

Trustworthiness in Modeling Unreinforced and Reinforced T-Joints with Finite Elements

Ouakka

Fantuzzi

2019

MCA

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“…Some research has been conducted in recent years on the static and dynamic behaviour of hollow and concrete filled SHS joints with different configurations [16][17][18][19][20][21][22]. Literature review shows that there is little research on skewed plate-to-SHS X-joints under compression.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigations on Skewed Plate-to-SHS X-Joints Under Compression

2019

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Experimental and numerical investigations were conducted on skewed plate-to-SHS X-joints under compression. In order to research static behavior of skewed plate-to-SHS X-joints under compression, a total of ten specimens including orthogonal and skewed plate-to-SHS X-joints were tested. The failure modes, compression-displacement curves and strain intensity distribution curves of joints were presented in the paper. The effects of τ (The ratio of plate thickness to SHS chord thickness) and θ (skewed angle between plate and SHS chord axis) on the ultimate bearing capacity and ductility of X-joints were also studied. The corresponding finite element analysis (FEA) was also performed and calibrated against the test results. Therefore, an extensive parametric study was carried out to evaluate the effects of main geometric parameters (τ and θ) on the static behavior of skewed plate-to-SHS X-joints under compression. Results of these tests showed that as value of θ increased, ultimate bearing capacity of X-joints increased irregularly. As value of τ increased, the ultimate bearing capacity of X-joints increased significantly. Maximum strain intensity was located in the region of weld seam end between plate and SHS chord. As value of θ increased, ductility of joints with thin plates increased; ductility of joints with thick plates decreased. Except X-joints with θ=90 0 , coefficient of ductility of joints with thick plates were larger than that of joints with thin plates. In addition, the design equations were proposed for skewed plate-to-SHS X-joints under compression, which were shown to be accurate and reliable.

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Miscellaneous Design Elements

2020

Peterson's Stress Concentration Factors

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Stress concentration factors and fatigue behavior of square bird-beak SHS T-joints under out-of-plane bending

Cited by 20 publications

References 20 publications

Trustworthiness in Modeling Unreinforced and Reinforced T-Joints with Finite Elements

Trustworthiness in Modeling Unreinforced and Reinforced T-Joints with Finite Elements

Experimental and Numerical Investigations on Skewed Plate-to-SHS X-Joints Under Compression

Miscellaneous Design Elements

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