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Escola Superior de Tecnologia e Gestão (ESTG) >
Artigos em Acta de Conferência Internacional (ESTG) >
Utilize este identificador para referenciar este registo:
http://hdl.handle.net/10314/3401
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| Título: | Temperature and Stress Influence in the Description of Time-Dependent Materials |
| Autores: | José, André
José, Cruz Pinto |
| Palavras Chave: | UHMW-PE
creep |
| Data: | 2006 |
| Editora: | 13th International Conference on Deformation, Yield and Fracture of Polymers, Kerkrade, the Netherlands |
| Resumo: | A new creep compliance equation has been developed and validated, yielding a fully coupled time-temperature-stress formulation, with long-term predictive capability. Stress-induced changes in intrinsic time scale were investigated by non-linear creep tests on an ultra-high molecular weight polyethylene (UHMW-PE), at three temperatures. The creep compliance vs.
time curves at five different stress levels were determined and shifted along the logarithmic time axis to get an attempted master compliance curve at a given reference stress level, according to the concept of time-stress equivalence. Experimental data for the polyethylene were obtained and analysed to identify the extent to which time-stress superposition relationships may be valid, and it is shown that they are only approximations, limited to narrow ranges of the experimental variables, in contrast with the proposed model that more accurately fits the experimental behaviour. |
| URI: | http://hdl.handle.net/10314/3401 |
| Aparece nas Colecções: | Artigos em Acta de Conferência Internacional (ESTG)
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Ficheiros deste Registo:
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Descrição |
Tamanho | Formato |
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| abst_long_f_rev.pdf | | 221Kb | Adobe PDF | Ver/Abrir | |
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