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Dynamic thermomechanical properties of composites based on thermoelastic wave scattering

Bestimmung der dynamischen thermodynamischen Eigenschaften von Verbundwerkstoffen aus der thermoelastischen Wellenstreuung

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Summary

The dynamic thermomechanical properties of a macroscopically homogeneous and isotropie particle composite are determined by means of an analytical model based on the theory of thermoelastic wave scattering. According to the present method, the energies of the incident and scattered waves are determined in terms of the dynamic stress/strain fields and heat flux/temperature fields, both for an incident shear wave and for an incident one consisting of a linear combination of a pressure and a thermal wave. The basic assumption is that there is no interaction between the respective fields of neighbouring inclusions, i.e. a low volume concentration of the particles and also a wave length of the incident field much greater than the diameter of the smallest sphere which can surround the inclusion. The model is applied to a particle composite containing rigid spherical, thermally insulated inclusions. Results for a wide range of the involved parameters are presented.

Übersicht

Die dynamischen thermomechanischen Eigenschaften makroskopisch homogener und isotroper Partikel-Verbundwerkstoffe werden mit Hilfe eines Modells, das auf der Theorie der Streuung thermoelastischer Wellen beruht, bestimmt. Die Energien der einfallenden und gestreuten Wellen werden ausgedrückt durch die dynamischen Spannungs-Verzerrungsfelder und Wärmefluß-Temperaturfelder, und zwar jeweils für eine einfallende Scherwelle uhd eine Linearkombination aus einfallender thermischer und Druckwelle. Grundlegend ist die Annahme, daß keine Wechselwirkung zwischen den betreffenden Feldern benachbarter Einschlüsse vorhanden ist, d. h. eine geringe Teilchenkonzentration und eine Länge der einfallenden Wellen, die sehr viel größer ist als der Durchmesser der kleinstmöglichen Kugel um den Einschluß. Das Modell wird auf einen Verbund mit starren und wärmeisolierten sphärischen Einschlüssen angewandt und mit Ergebnissen für einen weiteren Parametersatzbereich demonstriert.

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Authors and Affiliations

  1. Dept. of Mechanical Engineering Applied Mechanics Laboratory, University of Patras, P.O. Box 1134, 26110, GR-Patras, Greece

    V. Kostopoulos, L. Vellios &  S. A. Paipetis Ph.D

Authors
  1. V. Kostopoulos
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  2. L. Vellios
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  3. S. A. Paipetis Ph.D
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Kostopoulos, V., Vellios, L. & Paipetis, S.A. Dynamic thermomechanical properties of composites based on thermoelastic wave scattering. Ing. arch 60, 431–443 (1990). https://doi.org/10.1007/BF00531254

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  • DOI: https://doi.org/10.1007/BF00531254

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