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Elasticidade relativista

Authors: Ramos, M. P. Machado;

Elasticidade relativista

Abstract

[Excerto] A teoria clássica Newtoniana da elasticidade, que estuda a deformação de corpos sólidos quando estes sofrem a Acão de forcas, foi estabelecida no seculo XVII. Contudo, o desenvolvimento de uma teoria da elasticidade no contexto da Relatividade Geral foi feito muito mais tarde. Em meados do seculo XX, no contexto do detetor de Weber (1) para a deteção de ondas gravitacionais, foi necessário explicar como e que estas ondas interagiam com sólidos elásticos. O físico, Joseph Weber, da Universidade de Maryland, explicou esta interação, usando uma versão linearizada das equações de Einstein e considerando que o espaço material se podia tratar com a teoria Newtoniana. Nessa altura, esta abordagem de aproximação a um campo gravitacional fraco foi usado por vários cientistas para estudar fenómenos elásticos relativistas. Uma teoria de elasticidade, não linear, adaptada a Relatividade Geral, foi desenvolvida em 1972 pelos físicos Brandon Carter e Hernan Quintana na Universidade de Cambridge, no artigo "Foundations of general relativistic highpressure elasticity theory" (2), sendo que este e, ainda hoje, um trabalho de referência sobre este assunto. Segue parte do resumo (abstract) deste importante artigo cientifico publicado na prestigiada revista cientifica, "Proceedings of the Royal Society of London A" [...]

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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