Effects of mechanical property parameters on wrinkling behavior of thin-walled tubes in hydroforming process

Cui, Xiao-Lei; Wang, Xiaosong; Yuan, Shijian

doi:10.1007/s00170-018-2706-2

Cited by 12 publications

(5 citation statements)

References 19 publications

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“…The other part of the researchers concentrated on the influential factors study of wrinkling by numerical simulation. Cui et al [15] studied the influence of process parameters on the wrinkling of hydro-formed thin-walled tubes and obtained the influence of elastic modulus, initial yield stress, and tangent modulus on the tube wrinkling through the finite element method. Hasanpour et al [16] quantitatively studied the wrinkling phenomenon of the thin-walled tube in rotary bending and the effect of some process parameters by detecting wrinkling in a finite element model using velocity integral parameters.…”

Section: Introductionmentioning

confidence: 99%

A hierarchical prediction method based on hybrid-kernel GWO-SVM for metal tube bending wrinkling detection

Zhang

Yuan

Wang

et al. 2022

Int J Adv Manuf Technol

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Metal bending tube is widely used in industry while its forming defects extremely affect the bending quality. Among all defects, the bending-inside wrinkling caused by the non-uniform compressive stress is a zero-tolerated defect, particularly when the tube is for transportation. However, the current wrinkling detection approach, suffering from the lack of insight into wrinkling mechanism, is normally posteriori. To obtain the priori wrinkling condition for a certain go-to-bend tube, we put forward a metal tube bending wrinkling hierarchical prediction method based on hybrid-kernel Gray Wolf Optimizer (GWO) Support Vector Machine (SVM). Three typical kernel combinations are utilized for the GWO-SVM prediction model. To verify the proposed wrinkling prediction method, aluminum alloy series tubes are tested. By constructing the 12 typical designations aluminum alloy tubes' finite element bending simulation case base, the prediction model is trained through three hybrid-kernel GWO-SVMs, respectively. The results are compared with the traditional SVM and GWO-SVM, which show that the proposed hybrid-kernel GWO SVM model has the best performance for hierarchically predicting bending wrinkling. This proposed prediction method lays the foundation for metal tube bending wrinkling detection.

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Section: Introductionmentioning

confidence: 99%

A hierarchical prediction method based on hybrid-kernel GWO-SVM for metal tube bending wrinkling detection

Zhang

Yuan

Wang

et al. 2022

Int J Adv Manuf Technol

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show abstract

“…15 Cui et al studied the influence of mechanical properties on the wrinkling behavior of tubes, and found that the elastic modulus of the material has little effect on the wrinkling behavior of tubes, while the initial yield stress and tangent modulus have a greater effect. 16 However, the current methods for preforming wrinkles have some defects. For example, the formation and development of useful wrinkles are restricted by the die cavity shape, a long tube is prone to global buckling instability, and the formation and development of wrinkles are mutually restricted.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Plastic wrinkling of thin-walled tubes under axial compression in non-uniform temperature field

Cui

Guo

Wen

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The main purpose of this paper is to reveal the wrinkling behavior of thin-walled tubes under axial compression in a non-uniform temperature field formed by induction heating on a local position. The distribution of non-uniform temperature fields induced by induction heating and the wrinkling behavior of tubes under axial compression were studied by combining experiments and simulations. Moreover, the thickness and hardness distribution of the wrinkled tube were analyzed. The results show that the maximum temperature difference along axial direction of 5052 aluminum alloy and AZ31B magnesium alloy tubes can reach 129.1°C and 134.7°C in experiments, respectively. In the non-uniform temperature field with a maximum temperature of 250°C, axisymmetric wrinkles can be formed under axial compression on the tubes. With the increase of axial compression, the wrinkle width gradually decreases and its height gradually increases. The contour shape of wrinkles can be fitted accurately with GaussAmp function. There is an obvious thickening phenomenon on the wrinkles and the thickest point is located on the wrinkle top, where the thickness gradually increases with increasing the axial compression. In addition, the microhardness at the wrinkles is lower than that of the original tubes. It decreases with the increase in axial compression. The maximum reduction of microhardness of 5052 aluminum alloy and AZ31B magnesium alloy tubes at the wrinkles are 41.6% and 17%, respectively. This study not only can provide tube blank with useful wrinkles for hydroforming, but also can provide experimental data for establishing buckling theory of inhomogeneous tube shells.

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“…13,14 It can effectively improve magnesium alloy forming performance, and these formed parts are characterized by lightweight, high-specific strength and stiffness and so on. 15,16 It is of great practical significance to investigate the influence of different pulsating forming parameters on the deformation behavior of magnesium alloys and find out the optimum forming parameters.…”

Section: Introductionmentioning

confidence: 99%

Investigation on deformation behavior of magnesium alloy sheet AZ31B in pulsating hydroforming

Pan

2020

Proceedings of the Institution of Mechanical Engineers, Part B:

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Magnesium alloys have been known as the next generation material for lightweight body structures. Pulsating hydroforming is an effective method to improve magnesium alloy sheet forming performance, and the formed parts are characterized by lightweight, high-specific strength and stiffness. The deformation performance of magnesium alloy sheet AZ31B with a thickness of 0.6 mm under pulsating hydroforming has been investigated by means of experimental study, numerical simulation and theoretical analysis. The results show that under the same maximum hydraulic pressure, compared with simple linear loading, the magnesium alloy forming parts with pulsating hydraulic loading not only have better wall thickness uniformity and larger bulging height but also can delay the occurrence of fracture, improve the forming performance and ultimate the forming ability of magnesium alloy sheet. A new evaluation index is proposed to simplify the comprehensive forming performance of magnesium alloy parts with different amplitudes and frequencies more accurately, which can also be applied to determine the optimal forming parameters of magnesium alloy sheet AZ31B in the pulsating loading condition.

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Effects of mechanical property parameters on wrinkling behavior of thin-walled tubes in hydroforming process

Cited by 12 publications

References 19 publications

A hierarchical prediction method based on hybrid-kernel GWO-SVM for metal tube bending wrinkling detection

A hierarchical prediction method based on hybrid-kernel GWO-SVM for metal tube bending wrinkling detection

Plastic wrinkling of thin-walled tubes under axial compression in non-uniform temperature field

Investigation on deformation behavior of magnesium alloy sheet AZ31B in pulsating hydroforming

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