Ensaios de extrusão de barras entre matrizes de perfil sigmoidal

• Ano de defesa: 1973
• Autor(a) principal: Danna, Francisco Luiz
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Rio de Janeiro; Brasil; Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia; Programa de Pós-Graduação em Engenharia Mecânica; UFRJ
• Palavras-chave em Português: Extrusão; Mecânica dos sólidos; CNPQ::ENGENHARIAS::ENGENHARIA MECANICA::MECANICA DOS SOLIDOS
• Link de acesso: http://hdl.handle.net/11422/3473

Preliminarily, simple and plane-strain compression tests were made with pure and commercial lead in order to determine their isotropy and work-hardening conditions. Strip-extrusion experiments were afterwards made with a sigmoidal die profile for the maximum reduction condition, and with a straight die profile with the sarne reduction and axial lenght. The resul ts were compare d with those predi cted by the sigmoidal profile theory and comparisons were made between the two types of profiles. The influences on the process of work-hardening, friction and granulometry were also verified.