Elastic, thermal expansion, plastic and rheological processes – theory and experiment

Authors

  • Csaba Asszonyi
  • Attila Csatár
  • Tamás Fülöp
https://doi.org/10.3311/PPci.8628

Abstract

Rocks are important examples for solid materials where, in various engineering situations, elastic, thermal expansion, rheological /viscoelastic and plastic phenomena each may play a remarkable role. Nonequilibrium continuum thermodynamics provides a consistent way to describe all these aspects in a unified framework. This we present here in a formulation where the kinematic quantities allow arbitrary nonzero initial (e.g., in itu) stresses and such initial configurations which – as a consequence of thermal or remanent stresses – do not satisfy the kinematic compatibility condition. The various characteristic effects accounted by the obtained theory are illustrated via experimental results where loaded solid samples undergo elastic, thermal expansion and plastic deformation and exhibit rheological behaviour. From the experimental data, the rheological coefficients are determined, and the measured temperature changes are also explained by the theory. Dedicated to the memory of Zoltán Szarka (1927–2015).

Keywords:

solids, elasticity, rheology, thermal expansion, plasticity, thermodynamics

Published Online

2016-10-14

How to Cite

Asszonyi, C., Csatár, A., Fülöp, T. “Elastic, thermal expansion, plastic and rheological processes – theory and experiment”, Periodica Polytechnica Civil Engineering, 60(4), pp. 591–601, 2016. https://doi.org/10.3311/PPci.8628

Issue

Section

Research Article