A Hysteresis Model Suitable For Numerical Simulation Of Moisture Content in Wood

Henrik Lund Frandsen, Staffan Svensson, Lars Damkilde

Research output: Contribution to journalJournal articleResearchpeer-review

39 Citations (Scopus)

Abstract

The equilibrium moisture content in wood depends not only on the current relative humidity in the ambient air but also on the history of the relative humidity variations. This hysteresis dependency of sorption in wood implies that in the worst case the moisture content for a given relative humidity may deviate by 30-35%. While researchers seem to have reached a general agreement on the hypothesis for the sorption hysteresis phenomenon, only a few models describing the phenomenon are available. Current models as the independent domain model have numerical deficiencies and drawbacks.

This paper presents a new hysteresis model, which mathematically resolves in closed form expressions, with the current relative humidity and moisture content as the only input parameters. Furthermore, the model has the advantage of being applicable to different sorption isotherms, i.e. different species and different temperatures. These features make the model relatively easy to implement into a numerical method, e.g. the Finite Element Method.

Original languageEnglish
JournalHolzforschung
Volume61
Issue number2
Pages (from-to)175-181
Number of pages7
ISSN0018-3830
DOIs
Publication statusPublished - 2007

Keywords

  • Hysteresis
  • Independent Domain Model
  • Moisture Content
  • Numerical Method
  • Sorption

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