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TECHNICAL PAPERS

Numerical Simulation of Plastic Deformation of Pressurized Oblate Spheroid-Inscribed Single-Curvature Shells

[+] Author and Article Information
S. H. Zhang, J. Danckert, K. B. Nielsen

Department of Production, Aalborg University, Fibigerstraede 16, DK-9220, Aalborg, Denmark

Z. R. Wang

Harbin Institute of Technology, Harbin 150001, China

J. Manuf. Sci. Eng 122(1), 235-243 (Feb 01, 1999) (9 pages) doi:10.1115/1.538900 History: Received October 01, 1997; Revised February 01, 1999
Copyright © 2000 by ASME
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References

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Figures

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Structure and blank shape of a single-curvature shell: (a) schematic of the closed shell (b) shape of a blank before roll-bending (c) cross section shape of a blank after roll-bending
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Comparisons between FEM thickness distribution of shell A when the pressure is 1.8 MPa. (a) Scheme I, nonuniform initial thickness, (b) scheme II, uniform initial thickness, (c) scheme III, initial λ=0.67
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Experimental observations of wrinkling patterns for shell A: (a) initial wrinkles, (b) final wrinkles, (c) lateral view
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The deformation process of shell A, scheme I: free hydro-bulging with nonuniform initial thickness (a) P=0.64 MPa, (b) P=1.92 MPa with local necking
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Experimental strain distributions of shell A along the equatorial position: (a) in the circumferential direction, (b) in the longitudinal direction
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The FE models: (a) shell A, (b) shell B
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The deformed profile of shell A in scheme IV (a) P=0.64 MPa, (b) P=1.8 MPa
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The deformed profile of shell B, P=5.2 MPa
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Comparisons between variations of major radius and minor radius of FEM results and experiments for shell A
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Comparisons between variations of major radius and minor radius of FEM results of shell B

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