Report In: cienciavitae
Production of Thin-Walled Hollow Spheres for Gas Storage Systems (progress report 2)
— 2008 — Omnidea Lda.
Key information
Authors:
Published in
October 2008
Description
This progress report presents an enhanced version of the innovative tool design for manufacturing thin-walled hollow spheres in a single-stage forming process that was presented in a previous report. The technological enhancement results from the development of a novel type of mandrels (sacrificial polymer mandrels) that is found to enlarge the formability window of very slender hollow spheres by diminishing the risk of wrinkling and plastic instability. Numerical modelling based on independently-determined mechanical properties of the materials and executed on an innovative extension of the finite element flow formulation for metal-polymer cold forming applications is performed with the purpose of identifying the most important process parameters and understanding their influence in the overall formability. Results show the adequacy of single-stage nosing using sacrificial polymer mandrels whenever thin-walled tubes are to be cost competitively formed into hollow spheres for applications in gas storage systems.
Publication details
Authors in the community:
Luís Manuel Mendonça Alves
ist13976
Paulo António Firme Martins
ist12470
Publisher
Omnidea Lda.
Publication language (ISO code)
eng - English
Rights type:
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