Distribution of residual stresses in reinforcing steel bars

Volkwein, Andreas; Osterminski, Kai; Meyer, F. H.; Gehlen, Christoph

doi:10.1016/j.engstruct.2020.111140

Cited by 9 publications

(25 citation statements)

References 16 publications

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“…• Residual stresses at the rebar surface are reported to have a maximum value of about 150 MPa [3,17,18,28] and are, therefore, lower than predicted by our numerical simulations. • Findings of experimental investigations regarding the sign of the residual stresses at the rebar surface differ partly from the computational results.…”

Section: Parametermentioning

confidence: 50%

“…Evaluation at the end of path 1, i.e., for r = 5.85 mm, and after complete cooling, i.e., for t = t 2 . Comparing the computational results of the thermo-mechanical analysis with findings from literature [3,17,18,26,28] leads to the following observations:…”

Section: Thermo-mechanical Analysismentioning

confidence: 58%

“…Up to a depth of 2 mm, they measured tensile residual stresses using the cut compliance technique. Volkwein et al [28] examined the residual stress distribution in two rebars of the same grade and of identical diameter, d = 28 mm, produced from two different manufacturers. Both rebars showed compressive residual stresses in the core of the rebar and tensile residual stresses near the surface.…”

Section: Parametermentioning

confidence: 99%

“…Due to the complex rebar geometry, it is difficult to completely determine the stress state in service as well as the residual stress state present after heat treatment by experimental investigations [27]. Experimental approaches to determine residual stresses are restricted to single stress components or to the rebar surface [3,17,18,26,28]. To close this gap, numerical simulation plays an important role.…”

Section: Introductionmentioning

confidence: 99%

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An Approach to Predict Geometrically and Thermo-Mechanically Induced Stress Concentrations in Ribbed Reinforcing Bars

Robl

Wölfle

Hameed

et al. 2022

Metals

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Ribbed reinforcing steel bars (rebars) are used for the reinforcement of concrete structures. In service, they are subjected to cyclic loading. Several studies addressing the relationship between rib geometry, stresses at the rebar surface induced by service loads and the rebar fatigue performance can be found in literature. However, the rebar’s fatigue performance is also influenced by residual stresses originating from the manufacturing process. In this contribution, a modeling approach is proposed to examine geometrically and thermo-mechanically induced stress concentrations in ribbed reinforcing bars made of the steel grade B500B. A linear-elastic load stress analysis and a thermo-mechanical analysis of the manufacturing process are conducted. The results are discussed and compared to literature results. In case of the load stress analysis, the results agree well with findings reported in literature and extend the current state of knowledge for B500B rebars with small diameters. In case of the thermo-mechanical analysis, compressive residual stresses at the rebar surface between two ribs and tensile residual stresses in the longitudinal direction at the tip of the ribs can be reported.

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Section: Parametermentioning

confidence: 50%

Section: Thermo-mechanical Analysismentioning

confidence: 58%

Section: Parametermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Approach to Predict Geometrically and Thermo-Mechanically Induced Stress Concentrations in Ribbed Reinforcing Bars

Robl

Wölfle

Hameed

et al. 2022

Metals

View full text Add to dashboard Cite

show abstract

“…Thermite welded joints often suffer from non-uniform and highly localized temperature distribution associated with localized plastic deformation due to the non-linearity of material properties. It is well established that residual stresses play an important role in the structural behaviour of welded joints [65,66], especially for their fatigue performance in the presence of cyclic loading [67,68]. Various studies had been carried out to study the residual stress and its effect on the fatigue life of the thermite welded rail joints.…”

Section: Figure 2-17mentioning

confidence: 99%