Journal of the Brazilian Society of Mechanical Sciences and Engineering v.30 n.4 2008 Journal of the Brazilian Society of Mechanical Sciences and Engineering Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM) instacron:ABCM Scopus-Elsevier Journal of the Brazilian Society of Mechanical Sciences and Engineering, Volume: 30, Issue: 4, Pages: 285-289, Published: DEC 2008