title: Determination of mechanical and hydraulic properties of PVA hydrogels.
abstract: In this paper the identification of mechanical and hydraulic parameters of poly(vinyl alcohol) (PVA) hydrogels is described. The identification method follows the solution of inverse problem using experimental data from the unconfined compression test and the poroelastic creep model. The sensitivity analysis of the model shows significant dependence of the creep curves on investigated parameters. The hydrogels containing 22% PVA and 25% PVA were tested giving: the drained Youngs modulus of 0.71 and 0.9MPa; the drained Poisson's ratio of 0.18 and 0.31; and the permeability of 3.64·10(-15) and 3.29·10(15)m(4)/Ns, respectively. The values of undrained Youngs modulus were determined by measuring short period deformation of samples in the unconfined tests. A discussion on obtained results is presented.
authors.affiliation: Institute of Mechanics and Applied Computer Science, Kazimierz Wielki University, Kopernika 1, 85-074 Bydgoszcz, Poland. Electronic address: kkd@ukw.edu.pl.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Kazimierska-Drobny
authors.affiliation: Polymer Institute, West-Pomeranian University of Technology, Pulaskiego 10, 70-322 Szczecin, Poland.
authors.forename: Miroslawa
authors.initials: M
authors.lastname: El Fray
authors.affiliation: Institute of Mechanics and Applied Computer Science, Kazimierz Wielki University, Kopernika 1, 85-074 Bydgoszcz, Poland.
authors.forename: Mariusz
authors.initials: M
authors.lastname: Kaczmarek
mesh_terms: D019245:Compressive Strength; D055119:Elastic Modulus; D004548:Elasticity; D020100:Hydrogels / Q000737:chemistry*; D008422:Materials Testing / Q000379:methods; D008962:Models, Theoretical; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D013314:Stress, Mechanical
chemical_list: D020100:Hydrogels; D011142:Polyvinyl Alcohol
keywords: Creep test; PVA hydrogel; Parameter identification; Permeability; Poissons ratio; Young's modulus