Hydroforming and buckling of toroids with polyhedral sections

Zhang, Jian; Liu, Xiaobin; Zhan, Ming; Wang, Fang; Zhao, Xilu

doi:10.1080/17445302.2022.2082106

Cited by 7 publications

(8 citation statements)

References 45 publications

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“…The assumption has been successfully applied to hydrobulge spheres [15][16][17][18][19][20][21][22], toroids [23][24][25][26][27][28], ellipsoids [29][30][31][32][33][34], and eggs [35][36][37]. The external surfaces of the perfect prolate ellipsoid and assumed ellipsoidal preform are mathematically described in Eq.…”

Section: Geometric Definition and Analytical Formulationmentioning

confidence: 99%

“…Integral hydrobulging is a method of fabricating large shells of revolution that is effective, flexible, and inexpensive compared with traditional die forming [11][12][13][14]. Large shells of revolution, such as spheres [15][16][17][18][19][20][21][22], toroids [23][24][25][26][27][28], ellipsoids [29][30][31][32][33][34], and eggs [35][36][37], can be directly hydrobulged from polyhedral preforms without the use of dies. The performance of these hydrobulged shells has been widely explored using analytical, numerical, and experimental methods.…”

Section: Introductionmentioning

confidence: 99%

“…They observed that the polygonal cross-section of the innermost toroidal preform required the use of more sides than the outermost toroidal preform did [23][24][25][26][27]. The stresses on the innermost toroid were greater than those on the outermost toroid [28].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Integrated hydrobulging of prolate ellipsoids from preforms with multiple thicknesses

Zhang

Tang

Zhan

et al. 2023

Int J Adv Manuf Technol

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The integrated hydrobulging of stainless-steel prolate ellipsoids from preforms with two thicknesses was investigated. The produced ellipsoids were closed with two 16-mm-thick closures and had nominal semiminor and semimajor axes of 89 and 125 mm, respectively. The ellipsoidal preforms comprised eight conical segments inscribed inside the target perfect ellipsoid.The four end and middle segments of the preforms had nominal thicknesses of 0.67 and 0.83 mm, respectively. The hydrobulging of these preforms was explored analytically and numerically and was compared with that of prolate ellipsoids with constant thickness. Two nominally identical ellipsoidal preforms were fabricated, measured, and hydrobulged to confirm the theoretical predictions. The results indicated that varying the preform thicknesses is an efficient method of overcoming insufficient hydrobulging of the ends of prolate ellipsoids in other methods.Moreover, hydrobulging instability can be effectively monitored by measuring geometric dimensions, such as axial height.

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Section: Geometric Definition and Analytical Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Integrated hydrobulging of prolate ellipsoids from preforms with multiple thicknesses

Zhang

Tang

Zhan

et al. 2023

Int J Adv Manuf Technol

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Geometric Definition and Analytical Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Integrated hydrobulging of prolate ellipsoids from preforms with multiple thicknesses

Zhang¹,

Tang²,

Zhan³

et al. 2022

Preprint

Self Cite

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The integrated hydrobulging of stainless-steel prolate ellipsoids from preforms with two thicknesses was investigated. The produced ellipsoids were closed with two 16-mm-thick closures and had nominal semiminor and semimajor axes of 89 and 125 mm, respectively. The ellipsoidal preforms comprised eight conical segments inscribed inside the target perfect ellipsoid. The four end and middle segments of the preforms had nominal thicknesses of 0.67 and 0.83 mm, respectively. The hydrobulging of these preforms was explored analytically and numerically and was compared with that of prolate ellipsoids with constant thickness. Two nominally identical ellipsoidal preforms were fabricated, measured, and hydrobulged to confirm the theoretical predictions. The results indicated that varying the preform thicknesses is an efficient method of overcoming insufficient hydrobulging of the ends of prolate ellipsoids in other methods. Moreover, hydrobulging instability can be effectively monitored by measuring geometric dimensions, such as axial height.

show abstract

Effects of circumferential weld-induced imperfections on the buckling behavior of fabricated steel toroidal shells

Tangbanjongkij,

Chucheepsakul,

Pulngern

et al. 2024

Nuclear Engineering and Design

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Hydroforming and buckling of toroids with polyhedral sections

Cited by 7 publications

References 45 publications

Integrated hydrobulging of prolate ellipsoids from preforms with multiple thicknesses

Integrated hydrobulging of prolate ellipsoids from preforms with multiple thicknesses

Integrated hydrobulging of prolate ellipsoids from preforms with multiple thicknesses

Effects of circumferential weld-induced imperfections on the buckling behavior of fabricated steel toroidal shells

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