Relatório De: cienciavitae

Production of Thin-Walled Hollow Spheres for Gas Storage Systems (progress report 2)

Luís Manuel Mendonça Alves; N. Valverde; P.A.F. Martins — 2008 — Omnidea Lda.

Informações chave

Autores:

Luís Manuel Mendonça Alves (Luís Manuel Mendonça Alves); N. Valverde; P. Almeida; P.A.F. Martins (Paulo António Firme Martins)

Publicado em

Outubro 2008

Descrição

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.

Detalhes da publicação

Autores da comunidade :

Editora

Omnidea Lda.

Idioma da publicação (código ISO)

eng - Inglês

Acesso à publicação:

Acesso apenas a metadados