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 language | English (US) |
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Pages (from-to) | 3934-3944 |
Number of pages | 11 |
Journal | Journal of Applied Polymer Science |
Volume | 90 |
Issue number | 14 |
DOIs | |
State | Published - Dec 27 2003 |
Keywords
- Coatings
- Fibers
- Stress
- Yielding