Article In: orcid, cienciavitae
Forming of thin-walled hollow spheres using sacrificial polymer mandrels
International Journal of Machine Tools and Manufacture
— 2009
Key information
Authors:
Published in
May 2009
Abstract
This paper introduces a novel type of mandrels (sacrificial polymer mandrels) that is expected to enlarge the tube forming window of very slender preforms by diminishing the risk of wrinkling and plastic instability. The overall feasibility of the concept is demonstrated by means of a pre-industrial test case consisting of single-stage nosing of hollow spheres for gas storage applications. 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 using sacrificial polymer mandrels for the small-batch and low-cost production of thin-walled hollow spheres and, because the novel type of mandrels can easily be extended to other tube forming operations, it effectively contributes to transferable technological knowledge.
Publication details
Authors in the community:
Luís Manuel Mendonça Alves
ist13976
Paulo António Firme Martins
ist12470
Publication version
AO - Author's Original
Title of the publication container
International Journal of Machine Tools and Manufacture
First page or article number
521
Last page
529
Volume
49
Issue
6
Fields of Science and Technology (FOS)
mechanical-engineering - Mechanical engineering
Publication language (ISO code)
eng - English
Alternative identifier (URI)
http://www.scopus.com/inward/record.url?eid=2-s2.0-61449166851&partnerID=MN8TOARS
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