Cross-sectional analysis of arbitrary sections allowing for residual stresses

Li, Tian Ji; Liu, Si Wei; Chan, Siu Lai

doi:10.12989/scs.2015.18.4.985

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…According to the previous researches, the following assumptions are made for the fiber model [26][27]：…”

Section: Assumptionsmentioning

confidence: 99%

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Numerical Study and Design Method of High Strength Steel Welded Box Columns

2021

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In this paper, the buckling strength of HSS welded box columns was studied by means of numerical study, and the results were used to verify the applicability of provisions of buckling design in the current design codes and provide design recommendations. Fiber models were established taking into account for the effects of residual stress and geometric imperfection. Through the validation against the experimental results, these fiber models showed excellent capability of replicating the key test results, including buckling strengths and load-lateral deflection histories. Then a comprehensive parametric analysis was conducted to reveal the effects of steel grade and width to thickness ratio on column curves. The fiber model results were then compared with the design buckling strength factors from the current designs such as GB50017-2017, Eurocode 3 and ANSI/AISC 360-10. The comparison showed that the design codes could provide satisfactory accuracy in predicting buckling strength of HSS welded box columns by properly selecting co lumns curves. Furthermore, by updating the coefficients in the three current design codes, new column curves were proposed, which take the effects of yield strength and width-thickness ratio into consideration. The new column curves were proved to be able to predict the buckling strength with better accuracy and could facilitate the design of HSS welded box columns with different steel grades and width to thickness ratios.

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“…According to the previous researches, the following assumptions are made for the fiber model [26][27]：…”

Section: Assumptionsmentioning

confidence: 99%

“…Giving a specific mid-span curvature m  , the processes of iteration aiming to find the axial force Nin corresponding to the m  and satisfying the equilibrium is presented in Fig. 4 [27].…”

Section: Equilibrium and Calculation Processmentioning

confidence: 99%

Numerical Study and Design Method of High Strength Steel Welded Box Columns

2021

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“…To better exploit the characteristics of porous metals, many researchers had prepared and studied interpenetrating composite structures (IPCs) composed of porous metals and fillers. [39][40][41][42][43][44][45][46] These results show that the addition of fillers can significantly improve the mechanical properties and energy absorption capacity of porous metals. Most of the fillers selected for the current IPCs are polymeric materials, which do not possess porous structures.…”

Section: Introductionmentioning

confidence: 99%

Effect of Aluminum Porous Filling Methods on Mechanical Properties of Ordered– Disordered Porous Composite Structures

Bai

Liu

et al. 2022

Adv Eng Mater

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Herein, ordered porous aluminum is prepared using an indirect additive manufacturing method combining selective laser sintering (SLS) and infiltration casting process. Ordered porous aluminum samples with pore sizes of 7, 9, and 11 mm are prepared by varying the structure of the preforms. The pores of three types of ordered porous aluminum are filled with conventional disordered aluminum foam. Besides, ordered–disordered porous aluminum composite structures with two filling methods are designed and prepared. Afterward, the quasi‐static compression test is conducted on the sample, and the microscopic analysis is performed on the compressed sample. The compression and energy absorption properties of the ordered–disordered porous composite structure are investigated according to the test results. The increasing amount of disordered aluminum foam suppresses the deformation. The effect of the filling method on the compressive properties of the samples changes as the pore size varied. Compared with the ordered porous structures, ordered–disordered porous composite structures demonstrate higher compressive strength and energy absorption capacity with significantly higher platform stress.

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“…Interpenetrating phase composites (IPCs) represent an important class of materials with enhanced thermomechanical properties compared with their non‐IPC analogues 1 . Notable synergetic effects include higher stiffness 2 and compressive properties 3 than those of the individual components, and advantageous energy absorption capacity 2–4 . The processing of IPCs often relies on the infiltration of porous media such as open‐cell foam preforms with a liquid phase, followed by solidification, leading to a co‐continuous phase morphology.…”

Section: Introductionmentioning

confidence: 99%

Radical photoinduced cationic frontal polymerization in porous media

Maugeri

Sangermano

Leterrier

2020

Polymer International

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Two different interpenetrating phase composites were produced using a radical photoinduced cationic frontal polymerization process. The composites were based on polyurethane (PU) and aluminium open‐cell foams impregnated with a formulation of a cycloaliphatic epoxy with different concentrations of a cationic photoinitiator and a thermal initiator. The influence of both types of initiators on the frontal polymerization features was systematically evaluated for the PU foam. It was found to occur only when the concentration of both initiators was greater than 0.5 wt%, leading to full conversion of the epoxy in the whole volume of the 15 mm thick composite samples within less than 100 s. The maximum temperature reached by the propagation front was in the range 275–305 °C depending on the type of formulation, leading to pores in the epoxy phase and extensive degradation of the PU phase. In the case of the opaque aluminium foam, an additional layer of pure resin was required on the UV‐exposed surface, which corresponded to a critical mass of a few grams to ensure sufficient heat generation and trigger the front propagation. © 2020 Society of Chemical Industry

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Cross-sectional analysis of arbitrary sections allowing for residual stresses

Cited by 6 publications

References 8 publications

Numerical Study and Design Method of High Strength Steel Welded Box Columns

Numerical Study and Design Method of High Strength Steel Welded Box Columns

Effect of Aluminum Porous Filling Methods on Mechanical Properties of Ordered– Disordered Porous Composite Structures

Radical photoinduced cationic frontal polymerization in porous media

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