Experimental investigation on the longitudinal residual stress of cold-formed thick-walled SHS and RHS steel tubes

Li, Gong-Wen; Li, Yuanqi; Xu, Jie; Cao, Xu

doi:10.1016/j.tws.2018.09.036

Cited by 15 publications

(6 citation statements)

References 10 publications

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“…The accuracy of FE models developed in this study was evaluated by comparing numerical results with the corresponding experimentally measured surface residual stresses reported in the literature. 8,12,16,19 The numerically computed residual stress distributions for SHS in the longitudinal direction together with published data from other researchers are shown in Figure 4. For SHS 1 numerical investigation, experimental validation was conducted with averages of inner and outer surface measurements and is taken as outer surface residual stress distributions (Figure 4A).…”

Section: Validation Of Numerical Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 95%

“…Literature studies showed that a roll-formed product's structural performance and reliability considerably depend on residual stresses generated during the roll forming process. 3,4,12,16,[18][19][20] Since residual stresses magnitude and distribution generally play a significant role in the product's structural performance and reliability, several authors have studied its effect on the load-carrying behavior of structures and fatigue properties. 10,[21][22][23] Quach et al 23 investigated the effects of residual stress on the load-carrying capacity of hollow steel sections.…”

Section: Introductionmentioning

confidence: 99%

“…Roll‐formed SHS and RHS are widely used in load‐carrying structures due to their aesthetic form and superior load transfer behavior. Literature studies showed that a roll‐formed product's structural performance and reliability considerably depend on residual stresses generated during the roll forming process 3,4,12,16,18–20 . Since residual stresses magnitude and distribution generally play a significant role in the product's structural performance and reliability, several authors have studied its effect on the load‐carrying behavior of structures and fatigue properties 10,21–23 .…”

Section: Introductionmentioning

confidence: 99%

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Investigations of the through‐thickness residual stress distribution during the partial heating roll forming process of square and rectangular hollow steel sections

Mehari

Han

2022

Engineering Reports

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With the growing demand for rectangular and square hollow steel sections in the last few decades, the cold roll forming process has become a widely acknowledged manufacturing method. However, the residual stress generated during the roll forming process is one of the primary concerns on roll-formed products. One of the leading sources of residual stress is the severe plastic deformation that sheet metal experiences. It is well-known that residual stress significantly affects the product's service life. In this regard, several researchers have conducted numerical and experimental investigations of residual stress distributions on roll-formed steel sections. However, most of the studies found in the literature have been confined to the measurement of residual surface stresses. On the other hand, experimental studies conducted on fatigue and load-carrying capacity of hollow structural steels have shown that there is indeed a simple relation between the through-thickness residual stress distributions and mechanical properties of structures. Thus, this article employed a proper numerical modeling procedure using LS-DYNA's finite element code to explore through-thickness residual stress distributions generated during the roll forming process of rectangular and square hollow steel sections from different material grades. Moreover, a small-scale parametric study was conducted to explore the effects of the partial heating roll forming method on through-the-thickness residual stress distributions.

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Section: Validation Of Numerical Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigations of the through‐thickness residual stress distribution during the partial heating roll forming process of square and rectangular hollow steel sections

Mehari

Han

2022

Engineering Reports

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“…This increases the cost of raw materials by $160-220 per ton; (3) the deviation of the inner arc radius (r) of the cold-formed angle steel is large, making it impossible to arc shovel in subsequent processing and thus affecting the assembly of the angle steel tower; (4) the high residual stress distribution zone lies in the apex angle (the corner regions of cold-formed or cold-deformation area) [23,24]. It not only results in accelerating brittle fracture and stress corrosion cracking, but also affects the static load strength, fatigue strength and stability of components [25][26][27]. To overcome these existing problems, it is necessary to develop WAS for transmission towers.…”

Section: Introductionmentioning

confidence: 99%

Development of hot rolled weathering angle steel for transmission towers

Zeng

Chang

et al. 2019

Eng. Res. Express

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In this study, Q355 grade hot-rolled weathering angle steel (WAS) was successfully developed and produced for transmission towers (also known as electricity pylons) by chemical composition and process design. The microstructure and mechanical properties were investigated using optical microscopy, a universal material tester, and an impact tester. Cyclic immersion experiments were performed to study the corrosion behaviour of WAS and Q355 grade hot-rolled conventional angle steel (CAS) when exposed to a simulated industrial atmospheric environment. The characteristics of the rust layers on the tested samples were observed by scanning electron microscope, analysed by x-ray diffraction, and studied by polarisation measurements. The results indicated that WAS has good comprehensive mechanical properties. The weight loss showed that the corrosion resistance performance of WAS is superior to that of CAS. The components of the rust layers consisted primarily of α-FeOOH, γ-FeOOH and Fe 3 O 4 . However, the content of α-FeOOH in WAS was more than that in CAS and increased as corrosion progressed. The rust layer on WAS, comprised an α-FeOOH phase, and was more dense and adherent to the substrate than on CAS, providing better protection and lower corrosion weight loss than CAS. The electrochemical parameters show that the WAS has better corrosion resistance.

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Analysis of stress-strain in the partial heating roll forming process of high strength square hollow steel sections

Mehari

Han

Peng

et al. 2021

Int J Adv Manuf Technol

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Experimental investigation on the longitudinal residual stress of cold-formed thick-walled SHS and RHS steel tubes

Cited by 15 publications

References 10 publications

Investigations of the through‐thickness residual stress distribution during the partial heating roll forming process of square and rectangular hollow steel sections

Investigations of the through‐thickness residual stress distribution during the partial heating roll forming process of square and rectangular hollow steel sections

Development of hot rolled weathering angle steel for transmission towers

Analysis of stress-strain in the partial heating roll forming process of high strength square hollow steel sections

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