Modeling evolution of frost damage in fully saturated porous materials exposed to variable hygro-thermal conditions

Marcin Koniorczyk, Dariusz Gawin, Bernhard A. Schrefler

Research output: Contribution to journalArticle

40 Scopus citations

Abstract

Frost damage due to cyclic water freezing/ice thawing in the pores of building materials, is one of the main reasons jeopardizing durability of the structures in cold climates. A novel mathematical model of coupled hydro-thermo-mechanical phenomena in fully saturated porous materials exposed to water freezing/melting processes is proposed. The crystallization pressure, exerted by ice on the material pore walls and the related frost damage are considered. The kinetics of freezing/thawing phase change is modeled by means of a non-equilibrium approach. This kinetic description of the phase transformation allows avoiding numerical problems due to the strong sources of heat/mass accompanying the process. The frost deterioration is modeled by means of the isotropic nonlocal delayed damage theory in its rate formulation. The model equations are solved numerically by means of the finite element method in space and finite differences method in time. Three examples are solved to analyze the numerical performance of the model, to validate it by comparison with experimental results, and to present its application for modeling frost damage of a saturated concrete wall during cyclic freezing-thawing.

Original languageEnglish (US)
Pages (from-to)38-61
Number of pages24
JournalComputer Methods in Applied Mechanics and Engineering
Volume297
DOIs
StatePublished - Dec 1 2015

Keywords

  • Frost damage
  • Nonequilibrium freezing/thawing modelling
  • Rate type model of phase change

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Mechanical Engineering
  • Physics and Astronomy(all)
  • Computer Science Applications

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