On the characteristics of tubular materials for hydroforming—experimentation and analysis

Koç, Muammer; Aue‐u‐lan, Yingyot; Altan, Taylan

doi:10.1016/s0890-6955(00)00070-5

Cited by 99 publications

(41 citation statements)

References 2 publications

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“…7) can be fitted best to the experimental data for austenitic stainless steels [12,20] for IN 718 [21] and for SS 304 [7], while for aluminum alloys, the Hollomon hardening law (Eq. 8) was reported to give the best fit [22]:…”

Section: Hydroforming Pressmentioning

confidence: 99%

“…Conventionally, tensile test data have been determined from flat sheet products (i.e., materials used to manufacture the tube by roll forming, welding, and sizing) to determine the properties of the tubular forms. However, the tube manufacturing process changes the mechanical response/ properties of the material from that in the initial sheet condition; for instance, Koç et al [7] reported a difference in the flow behavior of tubular products from that of the blank sheet and Sokolowski et al [8] confirmed this difference by performing interrupted free expansion and tensile tests for SS 304. This discrepancy in the mechanical response may be even more prominent for seamless tubes that are manufactured from billet forms that undergo substantial changes in the microstructure and, thus, the mechanical response.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, Fuchizawa and Narazaki [13] developed an analytical model in which the profile at the free expansion region was assumed to be a circular arc and its radius of curvature was determined experimentally. Koç et al [7] proposed a combination of an online and offline measurement procedure to determine the necessary parameters (longitudinal and circumferential radius of curvature, as well as expansion and thickness at the maximum bulge height) to calculate the stress-strain curve. Hwang and Lin [14] assumed that the profile of the bulged zone was elliptical.…”

Section: Introductionmentioning

confidence: 99%

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Evaluating the flow stress of aerospace alloys for tube hydroforming process by free expansion testing

Saboori

Champliaud

Gholipour

et al. 2014

Int J Adv Manuf Technol

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Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Evaluating the flow stress of aerospace alloys for tube hydroforming process by free expansion testing Saboori, M.; Champliaud, H.; Gholipour, J.; Gakwaya, A.; Savoie, J.; Wanjara, P.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=fr L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D'UTILISER CE SITE WEB. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=21272131&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=21272131&lang=fr READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1007/s00170-014-5670-5International Journal of Advanced Manufacturing Technology, 72, 9-12, pp. 1275-1286, 2014 ORIGINAL ARTICLE Evaluating the flow stress of aerospace alloys for tube hydroforming process by free expansion testing Abstract In order to obtain accurate tube hydroforming (THF) simulation results, one of the important inputs in the finite element model (FEM) of the process is the mechanical response of the material during THF. Generally, the mechanical response is defined by the stress-strain behavior that can be determined from tensile testing of the specimens extracted either from the sheet used for roll forming of the tubes or directly from the tubes. More recently, free expansion testing has been used to characterize the mechanical response of the material for hydroforming applications. The free expansion test can emulate process conditions similar to those found during THF, and as such, can be used to obtain reliable and accurate information on the mechanical response/properties of the tubular material. The aim of this research is to present an approach for evaluating the s...

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Section: Hydroforming Pressmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluating the flow stress of aerospace alloys for tube hydroforming process by free expansion testing

Saboori

Champliaud

Gholipour

et al. 2014

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…Depending on the component and the rate of production involved, hydroforming processes can lead to an increase in the involved costs, and a possible way to lower these costs could be the adoption of numerical simulation tools for the process design. Previous works including the Finite Element Method in the simulation of hydroforming processes can be found in references [1][2][3][4][5][6][7][8][9]. Focusing on process for joining of open blanks, tailorwelded techniques refer to the class of joining procedures on flat blanks, which are subsequently subjected to forming operations [10][11].…”

Section: Introductionmentioning

confidence: 99%

Enhanced finite element formulations on the numerical simulation of tailor-welded hydroformed products

2009

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This work aims to assess the influence of different finite element formulations in the performance and quality of solution obtained by numerical simulation in the analysis of tailor-welded hydroformed tubular parts. Tube hydroforming represents a cost effective forming process for high-strength, low weight products on, as an example, automotive and airspace applications. On the other side, the use of tailor-welding in order to obtain custom-made combinations of thicknesses and materials -leading to a wide variety of user-defined products -can be introduced into conventional tubular hydroforming processes in order to further improve the applicability range of the later process. The main goal of the present work is to describe the state-of-the-art in the field, focusing on distinct finite element formulations and providing guidelines for the simulation of tubular hydroforming process combined with tailor-welded joining techniques. Hexahedral solid and solid-shell enhanced assumed strain elements, either with reduced and full numerical integration procedures, are analyzed in order to infer about the potentialities of the combined forming technology. Material characterization of the heat affected zone is included and the influence of finite element modeling on defects onset and prediction during forming is considered.

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“…Tube hydroforming could become an interesting solution for forming metallic liners as used in pressurized hydrogen storage. It has been demonstrated that material data obtained from tube bulging are more suitable to simulate hydroforming process than the classical tensile test ( [3], [4]). In [5], an analytical approach of tube bulging tests has been developped, based on geometric observations.…”

Section: Introductionmentioning

confidence: 99%

Determination of tube material hardening law using bulging tests

2008

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The paper is focused on the determination of mechanical characteristics for metallic materials shaped like tubes as used in tube hydroforming process. First, a procedure is described to carry out experimental tube bulging tests. It permits to identify a law linking the internal pressure to the bulge height. Second, based on this law and an original geometric modelling, strain and stress can be evaluated all over the free bulge zone of the tube. Third, numerical results obtained by finite element simulation are treated to validate the experimental behaviour law of the tube. It is shown that: measuring experimentally internal pressure and bulge height during tube bulging allows to determine tube hardening law and thickness distribution along the bulging area; a deviation of 2% is noticed between numerical and experimental results.

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On the characteristics of tubular materials for hydroforming—experimentation and analysis

Cited by 99 publications

References 2 publications

Evaluating the flow stress of aerospace alloys for tube hydroforming process by free expansion testing

Evaluating the flow stress of aerospace alloys for tube hydroforming process by free expansion testing

Enhanced finite element formulations on the numerical simulation of tailor-welded hydroformed products

Determination of tube material hardening law using bulging tests

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