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Engrenagens - Tipos
Engrenagens - Tipos
Engrenagens – áreas de contato
Engrenagens - Localização dos esforços
Fadiga por flexão – Modo clássico
Fadiga por flexão – Modo clássico
Fadiga por flexão – Modo não clássico
Fadiga por flexão – Modo não clássico
Fadiga por flexão – Modo não clássico
Fadiga por flexão – Modo não clássico
Fadiga de contato – superficial na forma de Pitting
“Pitting”
“Pitting”
Fadiga de contato por rolamento subsuperficial
Fadiga de contato por rolamento subsuperficial
Fadiga de contato por rolamento com presença de “asa de
borboleta”
Fadiga de contato – sub-camada “Spalling”
Fadiga de contato – “Spalling”
Fadiga de contato – “Spalling”
Fadiga térmica
Impacto
Impacto
Esmagamento
Desgaste abrasivo
Desgaste adesivo
Desgaste adesivo
Desgaste adesivo
Fratura
Fratura
Fratura
Falhas em componentes
manufaturados e mecanismos.
- Ferramentas e Matrizes -
Falhas de projeto da ferramenta – variação de seção
Falhas de projeto da ferramenta – Furos próximos à borda.
Falhas de projeto da ferramenta – Concentradores de tensões
Falhas de projeto da ferramenta – concentrador de tensão na forma
de entalhe
Falhas proveniente da usinagem – riscos grosseiros e marca de
estampagem
Falhas proveniente da usinagem – Remoção de material em borda
de furo por esmerilhamento após eletroerosão.
Falhas proveniente da usinagem de eletroerosão – Fratura em
molde para plástico.
Falhas proveniente da usinagem – retífica antes do revenido.
Tratamento térmico
–
Descarbonetação
Tratamento térmico – marcas de estampagem
Tratamento térmico – pontos moles
Tratamento térmico – Temperatura de austenitização excessiva
Tratamento térmico – Carburização excessiva formou carbonetos em
rede.
Qualidade do material – Dobra em martelo de forja
Qualidade do material – granulação grosseira
Condições severas
Condições severas – Desgaste erosivo
Condições severas –
“Heat checking” ou
fadiga térmica
Condições severas - Erosão
Condições severas
Condições severas
AULA 8  Análise de Falhas.ppt

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AULA 8 Análise de Falhas.ppt