Influence of strain-hardening models and slopes on the predicted residual stresses in structural steel S235 weldments

Sun, Jiamin; Nitschke–Pagel, Thomas; Dilger, Klaus

doi:10.1016/j.jmrt.2022.06.134

Cited by 11 publications

(4 citation statements)

References 31 publications

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“…Both the steel adherents and the single-ply GFRP composite were modeled with continuum eight-node hexagonal solid elements (T8). Based on the data available from the literature [ 43 ], the stress-strain relationship of the S235 grade steel adherents was programmed as a multilinear isotropic hardening model ( Figure 15 b). The single-ply GFRP composite was considered as an orthotropic material.…”

Section: Experimental and Numerical Proceduresmentioning

confidence: 99%

Experimental and Numerical Study on Mechanical Behavior of Steel/GFRP/CFRP Hybrid Structure under Bending Loading with Adhesive Bond Strength Assessment

Marszałek

Stadnicki

2023

Materials

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Adhesive bonding between steel and carbon-fiber-reinforced polymer (CFRP) composite leads to hybrid structures that combine the high strength and ductility of steel with the excellent specific strength and stiffness of CFRP composite. There is, however, a concern regarding possible galvanic corrosion when steel and carbon fibers are bonded together. One way to overcome this problem is placing glass fiber-reinforced polymer (GFRP) composite between the steel and CFRP composite, creating a more complex steel/GFRP/CFRP hybrid structure. Therefore, experimental and numerical studies on the mechanical behavior of the adhesive bonds between the steel sheet and the GFRP/CFRP hybrid composite were carried out. Among the different failure patterns, mode II was chosen for analysis because metal–polymer composite structures are usually subjected to bending, and debonding may occur due to in-plane shear stress. The tested steel/GFRP/CFRP hybrid structure was made of a hot-formed 22MnB5 boron steel sheet, intermediate single-ply bidirectional GFRP composite, and three-ply unidirectional CFRP composite. Additional mechanical tests were also carried out to determine various engineering constants of the components to simulate the debonding process. A finite element model of the steel/GFRP/CFRP hybrid structure with a typical cohesive interface was established and verified against the experimental data. The results showed that due to the use of various materials, the dominant failure modes in the hybrid structure under bending loading were a brittle fracture of the CFRP composite and debonding between the steel and the GFRP composite. However, the load-bearing capacity of the hybrid structure was five times greater than that of a non-reinforced steel sheet. In addition, its mass was only 28% greater than the non-reinforced steel sheet. The obtained results provided valuable conclusions and useful data to continue further research on the mechanical behavior of steel/GFRP/CFRP hybrid structures.

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Section: Experimental and Numerical Proceduresmentioning

confidence: 99%

Experimental and Numerical Study on Mechanical Behavior of Steel/GFRP/CFRP Hybrid Structure under Bending Loading with Adhesive Bond Strength Assessment

Marszałek

Stadnicki

2023

Materials

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“…Residual stresses are reduced in this condition, and it is quite detrimental to the structural properties of the components which contribute to the unsafe conditions of the structures [2]. According to the study by Sun et al [3] strain hardening, phases and temperature related strain hardening affects the residual stress during a single pass welding of joints especially in structural steel. Experimental and numerical investigations showed that the plasticity of materials has the capacity to influence the prediction of residual stress during welding.…”

Section: Introductionmentioning

confidence: 99%

Residual Stress Prediction during TIG and MIG Welding Process of Steel - A Review

Lawal,

Afolalu

2024

IOP Conf. Ser.: Earth Environ. Sci.

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In this study, a forensic review of residual stress predictions and its impact on welded joints especially the steel pipes during the Tungsten inert gas welding and metal inert gas welding processes were reviewed. It was established that in the case of MIG welding, the effect of residual stress can be reduced after treatment. In the case of TIG welding process, increase in current will lead to deformation and residual stresses. Estimating the residual stress is a challenging task. It is common to predict residual stress using a notch stress intensity factor, a numerical simulation approach coupled with a thermal-mechanical finite element model. Thus, adequate design in welding parameters will help in the optimization of the process to achieve a safe and reliable welded joint during TIG and MIG welding process.

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“…To address this, hydraulic bulge tests have been used as a means to generate biaxial stress conditions in sheet materials. The bulge test method has been extensively studied and used to characterize a wide range of materials, including aluminum alloys [8], dualphase steels [9], and stainless steels.…”

Section: Introductionmentioning

confidence: 99%

The Characterization of the Plastic Instability of S235 Thin Steel Sheets by Multiple Regression and Analysis of Variance Methods

GHAZOUANI,

NASRI,

ELADEB

et al. 2024

mech

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In this study, we present a new identification method of parameters characterizing the elastoplastic damage behavior of sheet metal based on analysis of variance. The analysis covered experimental and numerical simulation results using the finite element method of the sheet mild steel bulge test. The identification procedure was validated through a confrontation between numerical simulations and experimental results on several hydroforming applications, such as a free expansion and an expansion in matrix cavities. Results show consistency between experimental observations and numerical predictions of instabilities. Furthermore, the location of risk areas of instability and rupture and the damage level could be quantified. The analysis focused on a set of results combining experimental data and numerical simulations of the bulge test of steel sheets. The identified models were validated thanks to a comparison between numerical simulations and experimental results of a set of forming applications by bulge test. The results show coherence between the experimental observations and the numerical predictions of the instabilities.

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Influence of strain-hardening models and slopes on the predicted residual stresses in structural steel S235 weldments

Cited by 11 publications

References 31 publications

Experimental and Numerical Study on Mechanical Behavior of Steel/GFRP/CFRP Hybrid Structure under Bending Loading with Adhesive Bond Strength Assessment

Experimental and Numerical Study on Mechanical Behavior of Steel/GFRP/CFRP Hybrid Structure under Bending Loading with Adhesive Bond Strength Assessment

Residual Stress Prediction during TIG and MIG Welding Process of Steel - A Review

The Characterization of the Plastic Instability of S235 Thin Steel Sheets by Multiple Regression and Analysis of Variance Methods

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