Artículo
Abstract:
The stress relaxation and creep in amorphous materials, the dielectric relaxation in conducting polymers, the spin relaxation in spin‐glasses, are examples of processes described by the mathematical formalism of the theory of linear viscoelasticity. This description, given by a spectrum or distribution function, allows to express the temporal evolution of the relaxation through integral transformations. In many cases, however, this evolution is given directly using the empirical expression exp [—;(t/τ)γ], known as fractional exponential behaviour, where τ is a characteristic relaxation time and γ is a constant (0 < γ ≦ 1). It is shown that this empirical expression can be derived from the modified anelastic element (MAE) whose relaxation time depends on the time of the quasistatic test. From this dependence the spectrum for the MAE is calculated and correlated with the log—normal distribution. A novel procedure to calculate the parameters of the MAE is presented and applied to stress relaxation curves. Copyright © 1995 WILEY‐VCH Verlag GmbH & Co. KGaA
Registro:
| Documento: | Artículo |
| Título: | Mechanical Relaxation of Linear Viscoelastic Materials Described by the Modified Anelastic Element |
| Autor: | Povolo, F.; Hermida, É.B. |
| Filiación: | Departamento de Fisica, Facultad de Ciencias Exactas y Naturales (UBA), Buenos Aires and Departamento de Materiales, Comisión Nacional de Energía Atómica, Buenos Aires, Argentina |
| Año: | 1995 |
| Volumen: | 192 |
| Número: | 1 |
| Página de inicio: | 53 |
| Página de fin: | 64 |
| DOI: | http://dx.doi.org/10.1002/pssb.2221920107 |
| Título revista: | physica status solidi (b) |
| Título revista abreviado: | Phys. Status Solidi B Basic Res. |
| ISSN: | 03701972 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03701972_v192_n1_p53_Povolo |
Referencias:
- Nowick, A.S., Berry, B.S., (1972) Anelastic Relaxation in Crystalline Solids, , Academic Press, New York
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- Povolo, F., (1991) Mater. Trans. JIM, 32, p. 1141
- Povolo, F., Hermida, Analysis of Stress Relaxation and Creep Curves for a Log-Normal Distribution of Relaxation Times (1989) physica status solidi (b), 151, p. 71
- Hermida, Description of the Mechanical Properties of Viscoelastic Materials Using a Modified Anelastic Element (1993) physica status solidi (b), 178, p. 311
- Bronshtein, I.N., Semendyaev, K.A., (1979) Handbook of Mathematics, , Verlag Harri Deutsch, Frankfurt
- Nowick, A.S., Berry, B.S., Lognormal Distribution Function for Describing Anelastic and Other Relaxation Processes I. Theory and Numerical Computations (1961) IBM Journal of Research and Development, 5, p. 297
- Schwartz, G., (1995), Master Thesis, University of Buenos Aires; Prudnikov, A.P., Brychkov, Yu.A., Marichev, O.I., (1992) Integrals and Series, 5. , Gordon & Breach, Amsterdam
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- Majumdar, C.K., (1987) Non‐Debye Relaxation in Condensed Matter, p. 359. , T. V. Ramakrishnan, M. Raj Lakshmi, World Scientific Publ. Co., Singapor
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Citas:
---------- APA ----------
Povolo, F. & Hermida, É.B. (1995) . Mechanical Relaxation of Linear Viscoelastic Materials Described by the Modified Anelastic Element. physica status solidi (b), 192(1), 53-64.http://dx.doi.org/10.1002/pssb.2221920107
---------- CHICAGO ----------
Povolo, F., Hermida, É.B. "Mechanical Relaxation of Linear Viscoelastic Materials Described by the Modified Anelastic Element" . physica status solidi (b) 192, no. 1 (1995) : 53-64.http://dx.doi.org/10.1002/pssb.2221920107
---------- MLA ----------
Povolo, F., Hermida, É.B. "Mechanical Relaxation of Linear Viscoelastic Materials Described by the Modified Anelastic Element" . physica status solidi (b), vol. 192, no. 1, 1995, pp. 53-64.http://dx.doi.org/10.1002/pssb.2221920107
---------- VANCOUVER ----------
Povolo, F., Hermida, É.B. Mechanical Relaxation of Linear Viscoelastic Materials Described by the Modified Anelastic Element. Phys. Status Solidi B Basic Res. 1995;192(1):53-64.http://dx.doi.org/10.1002/pssb.2221920107
