An approach to improve thickness uniformity within tailor-welded tube hydroforming

Chu, Guannan; Liu, G.; Liu, W. J.; Shi, Yuan

doi:10.1007/s00170-011-3792-6

Cited by 10 publications

(2 citation statements)

References 10 publications

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“…For the zone of D 2 E 2 F 2 , the thinning ratio even decreases to 2 %. In view of the maximum thinning ratio 5 %, it is also far less than that of hydroforming technology [13]. It can be concluded that sound thickness distribution is an effortless advantage for hydroassisted forming.…”

Section: Thickness Distribution Of Hydro-assisted Tube Formingmentioning

confidence: 92%

Practicality and formability of integrally stiffened tube hydro-assisted forming

Chu

Liu

Zhang

et al. 2015

Int J Adv Manuf Technol

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To achieve integrally stiffened tubular component, a new technology named as hydro-assisted forming was put forward, which successfully realized integral component forming. Experiment and finite element simulation were conducted to explore the practicality and formability of stiffened tube hydro-assisted forming. Based on plastic mechanics, the critical mechanics condition was analyzed and given. At last, the shape error and thickness distribution were given in detail.The results indicate that internal pressure induces not only tensile hoop stress but also "backward" bending moment, which are useful to eliminate wrinkle defect. But it is worthwhile to note that buckling defect would happen if the internal pressure was too high due to the effection of rib initial deflection. Shape accuracy is sensitive to internal pressure. Geometric error decreases as internal pressure, but increases after the internal pressure reaches a certain degree. Both welding residual stress and thermal deformation are successfully eliminated due to plastic deformation happens during hydro-assisted forming process. In view of hydro-assisted forming process, sound thickness distribution is an effortless advantage for bending deformation has less effection on thickness distribution. The maximum thinning ratio is only 5 % for hydroassisted forming, which is far less than that of tube hydroforming. At last, an integrally stiffened tubal component with ellipticity of 2 was formed successfully by hydro-assisted forming technology, which rib height reaches 10 mm.

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Section: Thickness Distribution Of Hydro-assisted Tube Formingmentioning

confidence: 92%

Practicality and formability of integrally stiffened tube hydro-assisted forming

Chu

Liu

Zhang

et al. 2015

Int J Adv Manuf Technol

Self Cite

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“…If the properties of weld zones are not considered, then the simulation results are found to be deviating from the experimental results [3,6,18]. On considering the weld metal properties, results of simulation and experimental works are found to be in better agreement with each other [19][20][21]. The weld metal properties can be extracted from the physical destructive testing or by using the methods like rule of mixture (ROM) [22].…”

Section: Introductionmentioning

confidence: 98%

Numerical investigation on forming behavior of friction stir tailor welded blanks (FSTWBs) during single-point incremental forming (SPIF) process

Marathe

Raval

2019

J Braz. Soc. Mech. Sci. Eng.

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Tailor welded blank (TWB) is a product which is developed by joining two or more than two materials having same/different thickness and/or properties before any forming process. The method to join the materials can be any of the conventional or advanced methods. TWB offers advantages like overall weight and cost reduction in a product. Despite of such advantages, the application of TWBs is partially resisted by the disadvantages associated with it like formability reduction and weld line movement during the forming operations. A lot of effort has been done in order to overcome the mentioned limitations of the TWBs. However, for homogeneous blank, single-point incremental forming (SPIF) results in better formability so in present work, the attempt has been made to study the forming behavior of TWB during the SPIF process. In this work, the effect of TWB material parameters like yield strength ratio, thickness ratio, strength coefficient ratio and strain index ratio of the parent materials has been investigated on the weld line movement and % thinning of the blank through finite element analysis. In order to perform the numerical analysis, ABAQUS/Explicit was used. Using SPIF, round cup geometry is formed from a flat TWB and effect of different initial positions of tool is investigated. It has been found that when the forming process is started from the weld and tool is travelled toward strong material of the blank, it leads to the minimum thinning, weld line shift and plastic equivalent strain (PEEQ).

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FE Analysis of Single Point Incremental Forming (SPIF) for Tailor Welded Blanks (TWBs)

Marathe

Raval

2019

Lecture Notes on Multidisciplinary Industrial Engineering

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An approach to improve thickness uniformity within tailor-welded tube hydroforming

Cited by 10 publications

References 10 publications

Practicality and formability of integrally stiffened tube hydro-assisted forming

Practicality and formability of integrally stiffened tube hydro-assisted forming

Numerical investigation on forming behavior of friction stir tailor welded blanks (FSTWBs) during single-point incremental forming (SPIF) process

FE Analysis of Single Point Incremental Forming (SPIF) for Tailor Welded Blanks (TWBs)

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