SCFs in tubular X-connections retrofitted with FRP under in-plane bending load

Nassiraei, Hossein; Rezadoost, Pooya

doi:10.1016/j.compstruct.2021.114314

Cited by 34 publications

(12 citation statements)

References 38 publications

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“…The ultimate moments of specimens in groups T1 to T3 with different n 0 , β, and FRP layer-counts are summarised in Figure 14. Increasing β and layer count upgraded the resistance to IPB moment, as seen in previous studies [1,37]. An elevated n 0 reduced the threshold of the joint yielding moment and also decreased IPB resistance.…”

Section: Resultssupporting

confidence: 77%

Structural Behaviour of FRP-Reinforced Tubular T-Joint Subjected to Combined In-Plane Bending and Axial Load

Deng,

Chen,

Zhu

et al. 2024

Buildings

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In this study, 90 finite-element models are used to explore the behaviour of fibre-reinforced polymer (FRP) reinforced joints under combined in-plane bending (IPB) and axial load (AX). The effects of joint geometry, FRP layer count, and AX levels of the chord or brace are considered. Three typical failure modes are observed: chord plastic failure, brace plastic failure, and brace buckling failure. Increasing the number of FRP layers can ensure that failure is chord-related failure in a ductility manner rather than the unexpectedly brace-related brittle failure. Depending on the stress distribution of fibres, FRP reinforcement can restrict the deformation of joints subjected to complex loading patterns. Moreover, added FRP layers efficiently reduce the effect of brace AX on the IPB resistance. Finally, a modified strength equation is established, including the influence of FRP reinforcement, chord AX, and brace AX.

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Section: Resultssupporting

confidence: 77%

Structural Behaviour of FRP-Reinforced Tubular T-Joint Subjected to Combined In-Plane Bending and Axial Load

Deng,

Chen,

Zhu

et al. 2024

Buildings

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“…In another article by Yan et al [11], surrogate-based optimization with improved support vector regression was used for the non-circular vent hole on an aero-engine turbine disk. Hossein et al [12][13][14] discussed the stress concentration factors (SFCs) in circular hollow-section X-connections retrofitted with a fiber-reinforced polymer under different load conditions, and the SCFs were greatly reduced. Zhu et al [15] focused their efforts on optimizing the shape of a bolt hole in an engine sealing disk using multi-segment curves.…”

Section: Introductionmentioning

confidence: 99%

Design for the Vent Holes of Gas Turbine Flow Guide Disks Based on the Shape Optimization Method

Wen¹,

Zheng²,

Dong³

et al. 2023

Metals

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Two shape optimization methods, based on non-parametric and geometric parameters, were developed to address stress concentrations in the vent holes of gas turbine flow guide disks. The design optimization focused on reducing the maximum equivalent stress at the hole edge in an aero-engine gas turbine flow guide disk. The effectiveness of both methods in achieving this objective was studied. The results indicated that the non-parametric-based optimization method reduced the maximum equivalent stress at the hole edge by 24.5% compared to the initial design, while the geometric parameter-based optimization method achieved a reduction of 20.2%. Both shape optimization methods proved effective in reducing stress concentrations and improving fatigue life. However, the non-parametric shape optimization method resulted in a better design for the vent holes based on the study’s findings.

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“…The geometrical models for the analytical methods need to be simplified before the calculation. Among the numerical methods, the FEM method is the most widely used [ 15 , 16 , 17 ]. With the periodical boundary conditions, the TRS distribution patterns of composites have been analyzed [ 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Residual Stress Distribution Patterns of Prestressed Composites Considering Interphases

Wang

Hang

2023

Materials

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New finite element analysis procedures are developed in this study to obtain the precise stress distribution patterns of prestressed composites. Within the FEM procedures, an equivalent thermal method is modified to realize the prestress application, and a multi-step methodology is developed to consider coupling effects of polymer curing and prestress application. Thereafter, the effects of interphases’ properties, including the elastic modulus and coefficient of thermal expansion (CTE), on the stress distribution patterns are revealed. Analytical methods for residual stress prediction are modified in this study to demonstrate the finite element analysis procedures. From the residual stress results, it is found that the increase in the prestress level tends to contribute to the initiation of interphase debonding. The increase in the elastic modulus or CTE of the interphase results in very large circumferential and axial stress values appearing in the interphase. When the elastic modulus in the interphase is heterogeneous, the predicted stress values in the fiber and matrix are similar to the results predicted with the equivalent elastic modulus of the interphases. However, the heterogeneous elastic modulus results in serious circumferential and axial stress gradients in the interphase.

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SCFs in tubular X-connections retrofitted with FRP under in-plane bending load

Cited by 34 publications

References 38 publications

Structural Behaviour of FRP-Reinforced Tubular T-Joint Subjected to Combined In-Plane Bending and Axial Load

Structural Behaviour of FRP-Reinforced Tubular T-Joint Subjected to Combined In-Plane Bending and Axial Load

Design for the Vent Holes of Gas Turbine Flow Guide Disks Based on the Shape Optimization Method

Finite Element Analysis of Residual Stress Distribution Patterns of Prestressed Composites Considering Interphases

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