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Envelhecimento e previsão da vida útil de vedantes O-ring
Paperback
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ISBN10: 6206819280
ISBN13: 9786206819288
Publisher: Edicoes Nosso Conhecimento
Published: Jun 25 2025
Pages: 172
Weight: 0.52
Height: 0.40 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786206819288
Publisher: Edicoes Nosso Conhecimento
Published: Jun 25 2025
Pages: 172
Weight: 0.52
Height: 0.40 Width: 6.00 Depth: 9.00
Language: Portuguese
No departamento 3.4 da BAM, é testada a segurança dos recipientes de armazenamento de resÃduos radioativos. Nesses recipientes também são utilizados vedantes elastoméricos, cuja vida útil pode chegar a várias décadas. Por esse motivo, no âmbito deste trabalho, foram realizadas investigações abrangentes sobre o envelhecimento e a previsão da vida útil de vedantes de elastómero. Assim, foram obtidos conhecimentos aprofundados sobre como ocorre o envelhecimento de diferentes classes de elastómeros e como pode ser determinada a vida útil de vedantes de O-ring. O envelhecimento artificial foi realizado em três materiais a quatro temperaturas. As amostras envelhecidas por até 2,5 anos foram analisadas com diferentes métodos para caracterizar os danos ao material e o comportamento de vedação. Os resultados mostram que, em condições estáticas, as juntas continuam estanques mesmo quando as propriedades do material já sofreram alterações significativas, o que se manifesta, por exemplo, no endurecimento do material originalmente semelhante à borracha. Além das propriedades do material, foram também investigadas as propriedades do sistema de vedação, que têm uma maior relevância em termos de capacidade de vedação.
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