Analysis and design of hydroformed thin-walled tubes using enhanced one-step method

Élie-Dit-Cosaque, Xavier J-G; Chebbah, M. S.; Naceur, Hakim; Gakwaya, A.

doi:10.1007/s00170-011-3539-4

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…The reasons for this are more advanced pressing control technology, and the availability of FEM-which supports the design of the tools and components [14,15]. However, real product control tests are still necessary to ensure the optimization of production technology [16], and the intent of these is to gather as much experimental data as possible to allow adequate modelling of the production process [17].…”

Section: Introductionmentioning

confidence: 99%

Exhaust system piping made by hydroforming: relations between stresses, microstructure, mechanical properties and surface

Kucharska

Moraczyński

2020

Archiv.Civ.Mech.Eng

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The subject of research is car exhaust system piping made of chromium–nickel steel of grade AISI304L with a unique, complex shape that was obtained by hydroforming technology. The purpose of the research was to determine the relation between the microstructure features, surface condition, hardness and the stresses on the external surface as determined by the sin2ψ X-ray method. We found that the stresses were tensile and correlated with the steel hardness, i.e. they were greater where the hardness was higher. Moreover, longitudinal stresses showed a relationship with pipe wall thickness, while circumferential stresses did so only partially. According to our data, the greatest value of stress determined in the pipe amounted to 290 MPa, and was close to the yield point of the strain hardened 304L steel. As depicted via XRD and SEM examination, the pipe stress level and hardness were influenced by the transition γ→α’. Furthermore, in the region of higher stress and hardness, the amount of martensite was 10 vol.%. We also noted that the pipe’s outer surface when subjected to friction against the die shows lesser roughness compared to its inner surface upon exposure to water under pressure.

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Section: Introductionmentioning

confidence: 99%

Exhaust system piping made by hydroforming: relations between stresses, microstructure, mechanical properties and surface

Kucharska

Moraczyński

2020

Archiv.Civ.Mech.Eng

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“…In order to reduce the cost and lead time for development of THF, the use of FEM as a control tool to simulate the process is practically inevitable. In recent years, many improvements have been made in the FEM of THF, including development of more efficient finite element (FE) solvers (or computational techniques) [4,5], advanced material models for predicting failure during the process [6,7] and more accurate databases for the various parameters involved in the process, such as the coefficient of friction (COF), mechanical properties of the material and constitutive laws [8,9,10].…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Study of Preforming Stage in Tube Hydroforming

Farimani

Baradari

Champliaud

et al. 2014

KEM

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The preforming stage in hydroforming of an aerospace generic shape was investigated using a combination of experimentation and numerical modeling. The preform die was manufactured using a rapid prototyping method, namely the selective laser sintering (SLS) process. The preforming experiments were conducted on 0.9 mm and 1.2 mm thick stainless steel 321 (SS321) tubes. To evaluate the preforming process, an automated deformation measurement system, ARGUS®, was used to measure the 3-dimensional (3D) strains on the deformed tubes. Data collected from the experiments were used to validate the simulation of the preforming stage. The simulation and experimental results were found to be in good agreement, indicating that the preform model can be used as a starting point for simulating the tube hydroforming (THF) process. In addition, the SLS approach was found to be very promising, as it reduced greatly the lead time and cost of process development for THF.

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Determination of flow stress of thin-walled tube based on digital speckle correlation method for hydroforming applications

Liu

Yang

et al. 2013

Int J Adv Manuf Technol

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Analysis and design of hydroformed thin-walled tubes using enhanced one-step method

Cited by 6 publications

References 19 publications

Exhaust system piping made by hydroforming: relations between stresses, microstructure, mechanical properties and surface

Exhaust system piping made by hydroforming: relations between stresses, microstructure, mechanical properties and surface

Numerical and Experimental Study of Preforming Stage in Tube Hydroforming

Determination of flow stress of thin-walled tube based on digital speckle correlation method for hydroforming applications

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