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http://hdl.handle.net/11422/3473| Type: | Dissertação |
| Title: | Ensaios de extrusão de barras entre matrizes de perfil sigmoidal |
| Author(s)/Inventor(s): | Danna, Francisco Luiz |
| Advisor: | De La Penha, Guilherme |
| Abstract: | Preliminarmente, foram realizados ensaios de compressão simples e plana do chumbo puro e chumbo comercial para a determinação das condições de isotropia e encruamento. Em seguida, realizou-se ensaios de extrusão de barras entre matrizes de perfil sigmoidal para a condição de máxima redução, e entre matrizes de perfil reto com a mesma redução e comprimento axial. Foram feitas, então, comparações entre os resultados obtidos com os preditos pela teoria do perfil sigmoidal, e entre os dois tipos de perfis ensaiados. Verificou-se também a influência do encruamento, atrito e granulometria no processo. |
| Abstract: | 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. |
| Keywords: | Extrusão Mecânica dos sólidos |
| Subject CNPq: | CNPQ::ENGENHARIAS::ENGENHARIA MECANICA::MECANICA DOS SOLIDOS |
| Program: | Programa de Pós-Graduação em Engenharia Mecânica |
| Production unit: | Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia |
| Publisher: | Universidade Federal do Rio de Janeiro |
| Issue Date: | May-1973 |
| Publisher country: | Brasil |
| Language: | por |
| Right access: | Acesso Aberto |
| Appears in Collections: | Engenharia Mecânica |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 132393.pdf | 1.76 MB | Adobe PDF | View/Open |
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