Experimental and numerical investigations on springback in V-bending of tailor-welded blanks of interstitial free steel

Gautam, Vijay; Kumar, Deepak

doi:10.1177/0954405416687146

Cited by 23 publications

(13 citation statements)

References 32 publications

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“…According to equations (6) and (9), the distribution of tangential stress, s u , in the plastic deformation zone can be expressed as follows…”

Section: The Von Mises Criterion Is Used For Plastic Yieldingmentioning

confidence: 99%

“…7 Plastic deformations in each bending step result in residual stresses and strains, which may potentially affect the determination of forming parameters and bending path. However, most of the current research focused on the study of springback behavior in bending process, [8][9][10][11] and the residual stresses and strains caused by cold bending process have not been paid enough attention. Therefore, it is of importance to predict residual stresses and strains of the formed plates in the forming process.…”

Section: Introductionmentioning

confidence: 99%

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Residual stresses and strains analysis in press-braking bending parts considering multi-step forming effect

Zhang

Tian

2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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Press-braking bending is a multi-step bending process and widely applied in the aerospace industry. Residual stresses and strains generated during the forming process play an important role in determining its forming parameters and bending path. This work aims to analyze the residual stresses and strains in press-braking bending parts using both the theoretical method and numerical method. First, the analytical model of residual stress and strain is established based on the elastic–plastic bending theory. Second, a fully finite element model of press-braking bending has been developed, and a procedure to simulate the multi-step bending process is presented by using the elastic–plastic large deformation finite element method. The simulation results are then compared with three-point bending experiments in terms of forming force and final shapes of the bent specimens, and excellent agreement is achieved. Finally, the results calculated from the analytical model are compared with the numerical results. The distributions of residual stresses and strains on the finished plate along the length and thickness direction, and particularly the multi-step forming effect on residual stresses and strains, are discussed. It is found that the residual stresses and strains decrease at the initial loading position along the thickness direction during the forming process of subsequent loading positions. With the same punch displacement, the residual stresses and strains at the initial loading position are less than those at the subsequent bending position.

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“…According to equations (6) and (9), the distribution of tangential stress, s u , in the plastic deformation zone can be expressed as follows…”

Section: The Von Mises Criterion Is Used For Plastic Yieldingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Residual stresses and strains analysis in press-braking bending parts considering multi-step forming effect

Zhang

Tian

2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…Based on the simulation results, various parameters can be modified to verify their effect on the output data. [39][40][41][42] Figure 12 shows the FE model for Hecker's punch stretching tests of boron steel (22MnB5) sheets. Specifically, reduced-integration four-node linear shell elements (S4R) are utilized for the blank.…”

Section: Fe Simulationsmentioning

confidence: 99%

Combined numerical and experimental study to predict the forming limit curve of boron steel sheets at elevated temperatures

Nguyen

Kim

2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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The aim of this study involved evaluating and predicting forming limit curves of boron steel 22MnB5 sheet at elevated temperatures. A finite-element method simulation was adopted based on ductile fracture criteria and simple experiments at elevated temperatures. First, tensile experimental data and ductile fracture criterions of Johnson–Cook and ductile void growth models were input to ABAQUS/Explicit software to predict and compare the same with fracture occurrence in experiments performed via Hecker’s punch stretching tests at room temperature. Subsequently, punch stretching test data at room temperature were added to correct the fracture strain locus in the space of the stress triaxiality and the equivalent strain following the ductile void growth model. After confirming the accuracy of the forming limit curve prediction at room temperature, fracture strain loci at high temperatures using ductile void growth model were determined based on the average ratio between the fracture equivalent plastic strains at room temperature as well as higher temperatures. Finally, Hecker’s punch stretching tests were numerically simulated to predict forming limit curve(s) of boron steel 22MnB5 sheet at high temperatures.

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“…For the GTAW process, Goldak double ellipsoidal source was implemented for getting an accurate result. It is observed that most of the studies discussed are repeatedly focused on Al and steel materials [10][11][12]. This makes a great deal to study the manufacturing of titanium and its alloy-based TWB as they are widely used in aerospace and defense applications [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical studies on gas tungsten arc welding of Ti–6Al–4V tailor-welded blank

Karpagaraj

Kumar

Thiyaneshwaran

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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The effect of gas tungsten arc welding (GTAW) process parameters and its impact on the titanium TWB was studied experimentally as well as using numerical simulation. Bead characteristics of BoP trials (bead on plate) were analyzed based on Taguchi L 27 orthogonal array by taking welding current (115 A, 125 A, 135 A), welding speed (4.1 mm/s, 5.8 mm/s, 7.5 mm/s) and arc length (3 mm, 4 mm, 5 mm) as process parameters. The bead width and depth of penetration for all trials were measured by using the weld expert system. Based on the bead characteristics, optimized GTAW process parameters (135 A, 4.1 mm/s and 3 mm) were identified for making the TWB by joining 2-1.6-mm-thick Ti-6Al-4V sheets. The tensile test of the prepared Ti-6Al-4V TWB was conducted in the universal testing machine. The COMSOL and ABAQUS software packages were used for the numerical simulation of TWB to assess the bead profile and tensile properties. The prediction made from the temperature distribution curve related to phase change near weld zone, exactly matched with the experimental work. The joint strength of TWB observed to be around 982 MPa and 1005 MPa was evaluated experimentally and conducting ABAQUS simulation work. The tensile test results were comparable with each other within the acceptable error level.

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Experimental and numerical investigations on springback in V-bending of tailor-welded blanks of interstitial free steel

Cited by 23 publications

References 32 publications

Residual stresses and strains analysis in press-braking bending parts considering multi-step forming effect

Residual stresses and strains analysis in press-braking bending parts considering multi-step forming effect

Combined numerical and experimental study to predict the forming limit curve of boron steel sheets at elevated temperatures

Experimental and numerical studies on gas tungsten arc welding of Ti–6Al–4V tailor-welded blank

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