Stress Development in Drying Fibers and Spheres

Herong Lei, Lorraine F. Francis, William W. Gerberich, L. E. Scriven

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Stress development during drying is a critical factor that affects the final structure and properties of a coated fiber or spherical product. Stress development during drying of the coating is due to nonuniform shrinkage and physical constraints. In this study, a large deformation elasto-viscoplastic model is developed to predict stress development in drying fibers and spheres after the coatings solidify. From the model, stress evolution in the drying fibers/spheres can be predicted by a partial differential equation of diffusion in one dimension, a first-order partial differential equation of pressure distribution, and two ordinary differential equations on local evolution of the stress-free state. The system of equations is solved by the Galerkin/finite element method in the one dimensional axial/ spherical symmetric coatings. Solutions show changes in solvent concentration and viscous stress as the coating dries.

Original languageEnglish (US)
Pages (from-to)3934-3944
Number of pages11
JournalJournal of Applied Polymer Science
Volume90
Issue number14
DOIs
StatePublished - Dec 27 2003

Keywords

  • Coatings
  • Fibers
  • Stress
  • Yielding

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