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Effects of manufacturing methods and production routes on residual stresses of rectangular and square hollow steel sections: a review

Abathun Mehari Zelalem, Han Jingtao, Yu Wang

Archives of Civil and Mechanical Engineering

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2021

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Vol. 21, no. 3

246--264

EN

Rectangular and square hollow steel sections can be manufactured using either a “direct forming” or an “indirect forming” method. The production route for both “direct forming” and “indirect forming” techniques can be conducted at room temperature (cold forming) or elevated temperature (hot forming). It might also start by forming at room temperature and subsequently followed by heat treatment (hot-finishing). The manufacturing method and production route choice cause the final products that are roll-formed from the same material to possess different mechanical properties. One of the main reasons for the disparity of mechanical properties is the variation of residual stress induced during forming processes. In this paper, available numerical and experimental studies of different rectangular and square steel hollow sections manufacturing methods and production routes on residual stresses are comprehensively reviewed. Furthermore, studies on the effects of roll-forming parameters on product quality and residual stresses are integrated. Moreover, future research activities aiming to manufacture residual stresses-free rectangular and square hollow sections are recommended.

2

The effect of cross-section stiffness ratios on the resistance of joints composed of rectangular and circular hollow sections

Beke P., Kvocak V.

Zeszyty Naukowe Politechniki Rzeszowskiej. Budownictwo i Inżynieria Środowiska

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2009

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z. 52 [264]

17-23

EN

The paper presented focuses on the comparison of the measurement results obtained in laboratory experiments on joints composed of rectangular and circular hollow sections. Special attention is paid to T-section joints that consist of single chord and brace members. The evaluation procedure monitors the resistances and deformations of such joints.

3

Projektowanie belek bezprzekątniowych z kształtowników zamkniętych zgodnie z PN-EN 1993-1

Bródka J., Broniewicz M.

Inżynieria i Budownictwo

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2009

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R. 65, nr 7

402-405

PL

Przedstawiono zasady kształtowania i oceny bezpieczeństwa elementów i węzłów belek bezprzekątniowych. Zamieszczono przykłady liczbowe obliczania nośności węzłów tego rodzaju belek.

EN

Basic rules for shaping and evaluation of safety requirements of Vierendeel type girder members and joints are presented. Numerical examples are included that are concerned with the evaluation of joint resistance of such girders.

4

Stretch bending of aluminium extrusions

Clausen A. H., Hopperstad O. S., Langseth M.

International Journal of Applied Mechanics and Engineering

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2002

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Vol. 7, no 1

7-32

EN

Stretch bending is an important method for plastic forming of aluminium extrusions to some desired curvature. The industrial application of the process is, however, not always straightforward. Tolerance demands to the final product and production efficiency require proper control of possible difficulties such as cross sectional deformations and unloading springback. Traditionally, trial-and-error and in-house experience have provided information for necessary process adjustments. The development of numerical tools such as the Finite Element Method (FEM) offers new possibilities for attaining further and more generally applicable knowledge on the stretch bending process. However, numerical simulation of forming processes is a rather delicate task involving large deformations, material non-linearities and contact challenges. Therefore, laboratory test data must be used to validate the numerical model. Rectangular hollow sections were thus studied in a stretch bending rig. Considering sagging and springback as the main response parameters, satisfactory agreement was found between test results and numerical predictions from LS-DYNA. Subsequently, LS-DYNA was employed to analyse a wider spectrum of process parameters than those investigated in the laboratory.