Creep or relaxation master curves calculated from experimental dynamic viscoelastic function

• Type: Article in International Scientific Journal
• Date: 1998

Authors

Rui Miranda Guedes (Author) FEUP; António Torres Marques (Author) FEUP; Albert Cardon (Author) Other

Journal

Title: Science and Engineering of Composite Materials

Vol. 7 No. 3

Pages: 259-267

ISSN: 0334-181X

Publisher: Walter De Gruyter

Indexing

ISI Web of Knowledge - 8 Citations

Scopus - 8 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

CORDIS: Technological sciences > Engineering > Mechanical engineering

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9