Theoretical failure investigation for sheet metals under hybrid stretch-bending loadings

Li, Shuhui; He, Ji; Zhao, Yixi; Wang, Shanshuai; Dong, Li Min; Cui, Ronggao

doi:10.1016/j.ijmecsci.2015.10.006

Cited by 13 publications

(2 citation statements)

References 44 publications

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“…With the development of subsequent theory and experiments, machining limits of various defects of sheet metal have a more accurate range. [7][8][9][10][11][12] Guo et al 13 compared the machining limit curves predicted by M-K model and Lou 2 Huh criterion through experiments, and the results showed that the accuracy of Lou 2 Huh criterion was higher. As the demand for complex structural parts increased, the research on forming defects and machining limits has become more diversified.…”

Section: Introductionmentioning

confidence: 99%

Study on the effect of multi-point stretch-bending processing conditions on the section distortion of complex cross-sectional parts

Liang

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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Section distortion is a common defect in plastic forming, however, excessive section distortion will affect the actual use of the workpiece. In this paper, the finite element software ABAQUS is used to simulate the multi-point flexible stretch-bending process. Processing parameters are important factors in the forming process of the profile, so this paper discusses the effects of three processing parameters, namely the effects of pre-stretching amount, pro-stretching amount and friction coefficient on section distortion under different bending radius, taking the complex cross-sectional T-profile as an example. And the validity of the simulation results is verified by comparing with the experimental results and the simulation results. At the same time, the upper limit value of section distortion is given according to the actual assembly and use of aluminium profile components of high-speed train head frame, and the minimum bending radius (i.e., processing limit) for which the section distortion does not exceed the given value under different process parameters is explored and used for practical production guidance.

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Section: Introductionmentioning

confidence: 99%

Study on the effect of multi-point stretch-bending processing conditions on the section distortion of complex cross-sectional parts

Liang

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…The increase or the decrease amounts of the line segments at the neighboring regions of the arc segment were iterated to compensate the deformation of the bend region. Li et al [3] studied the failure condition of the stretch-bending process of the DP780 and AA2024-T351 materials. The thickness and the strength of the materials are the crucial parameters for the development of damage development.…”

Section: Introductionmentioning

confidence: 99%

Modelling of Neutral Line Parameter for Sheet Metal Stamping and Roll Forming Processes

Wang

Chen

et al. 2020

SSP

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The blank development of sheet metal for the stamping and the roll forming processes is crucial for the dimensional accuracy of the products. The neutral line parameter is the indicator to present the thinning phenomenon at the bending corners of the products. The basic assumption of the neutral line position is the surface that the sheet metal remains un-deformed after the stamping or the roll forming process. The conventional determination method of the neutral line position is based on the zero strain position through the thickness direction of the blank. In this paper, a different neutral line factor calculation method based on the mean profile length was proposed to find the neutral line factor, which is directly related to the profile length and more precise for the bland development calculation. A cross sectional profile was obtained after the forming process and the mean profile length of the upper and the lower surface was obtained. The ratios of the bending radius to the sheet thickness were calculated using the FEM simulation. A neutral line equation was proposed considering the material mechanical properties and the bending tool parameters. The initial blank width was compared to the forming result of the CAE simulation to validate the neutral line model. This model is able to take into consideration of the thinning effect at the entire bending zone of the metal forming without the assumption of the uniform thinning and is more accuracy for the blank width calculation.

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Experimental Study and Analysis on the Effects of Cyclic Bending on the Stress-Strain Curves of Aluminum Plate

Wang

Tong

2021

Forming the Future

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Theoretical failure investigation for sheet metals under hybrid stretch-bending loadings

Cited by 13 publications

References 44 publications

Study on the effect of multi-point stretch-bending processing conditions on the section distortion of complex cross-sectional parts

Study on the effect of multi-point stretch-bending processing conditions on the section distortion of complex cross-sectional parts

Modelling of Neutral Line Parameter for Sheet Metal Stamping and Roll Forming Processes

Experimental Study and Analysis on the Effects of Cyclic Bending on the Stress-Strain Curves of Aluminum Plate

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