Creep or relaxation master curves calculated from experimental dynamic viscoelastic function

• Tipo: Artigo em Revista Científica Internacional
• Data: 1998

Autores

Rui Miranda Guedes (Autor) FEUP; António Torres Marques (Autor) FEUP; Albert Cardon (Autor) Outra

Revista

Título: Science and Engineering of Composite Materials

Vol. 7 Nº 3

Páginas: 259-267

ISSN: 0334-181X

Editora: Walter De Gruyter

Indexação

ISI Web of Knowledge - 8 Citações

Scopus - 8 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia dos materiais

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia mecânica

Outras Informações

ID Authenticus: P-001-9R0

Abstract (EN): The problem treated consists in obtaining the unknown creep or relaxation master curves from experimental dynamic viscoelastic functions obtained on a DMTA analyser. In the present work, a general discrete model, the generalised Kelvin model or the generalised Maxwell model, is used to fit the complex compliance or the complex modulus, respectively. A linear regression technique is applied to the measured data in an iterative calculation, varying the relaxation or the retardation times to obtain the minimum of the relative error. For a physical meaning the admissible solutions do not include negative relaxation or retardation times. The method may be used to obtain an approximation of the discrete relaxation or retardation spectra from dynamic experimental data The error within this procedure is discussed.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9