Profile development in drawn hollow tubes

B. D. Freeman, M. M. Denn, R. Keunings

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Profile development in isothermal drawing of hollow tubes is studied using finite-element and asymptotic analyses. The transition from die flow to extensional flow of an annulus occurs over a distance comparable to the annular thickness. Considerable extrudate swell can occur with the flow rearrangement, and the final ratio of inner to outer radius can fall below that at the die despite an increase in this ratio over the entire draw zone. Asymptotic “thin-filament” equations describe the flow beyond the region of flow rearrangement.

Original languageEnglish
Pages (from-to)171-186
Number of pages16
JournalJournal of Polymer Engineering
Issue number1-4
Publication statusPublished - Dec 1986
Externally publishedYes

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