Mechanical properties of microcrystalline cellulose - Part II. Constitutive model

O. I. Zhupanska, A. I. Abdel-Hadi, N. D. Cristescu

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


An elastic/viscoplastic model with non-associated flow rule for microcrystalline cellulose powder PH-105 with mean particle size 20 μm is formulated using experimental data from a number of triaxial tests. The model reproduces the major aspects of the complex powder response that is governed by plastic (dependent on history of the loading) effects, time effects (both creep and relaxation) and irreversible volumetric changes (it is practically the compressibility that was observed in the experiments on the microcrystalline cellulose powder with mean particle size 20 μm). Constitutive parameters and functions of the presented model (the elastic parameters, yield function and viscoplastic potential) were determined directly from the experimental data. Finally, the validity of the model has been discussed. Published by Elsevier Science Ltd.

Original languageEnglish (US)
Pages (from-to)391-399
Number of pages9
JournalMechanics of Materials
Issue number7
StatePublished - Jul 2002
Externally publishedYes


  • Constitutive model
  • Flow rule
  • Microcrystalline cellulose
  • Viscoplasticity

ASJC Scopus subject areas

  • Mechanics of Materials
  • Instrumentation
  • General Materials Science


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