A numerical-experimental method for a mechanical characterization of biological materials.
For the determination of material parameters, it is a common practice to extract specimens with well-defined geometries. The design of the samples and the choice of the applied load are meant to lead to a homogeneous stress and strain distribution in a part of the sample. When applied to biological materials, this raises a number of problems: homogeneous strains cannot be obtained because the materials have inhomogeneous properties, and the manufacturing of samples is hard or sometimes impossible. In this technical note a different approach is presented, based on the use of a digital image technique for the measurement of nonhomogeneous strain distributions, finite element modeling and the use of a minimum-variance estimator. The method is tested by means of experiments on an orthotropic elastic membrane of a woven and calendered textile. Five parameters are identified using the experimental data of one single experiment.
Oomens
C W
CW
Eindhoven University of Technology, The Netherlands.
van Ratingen
M R
MR
Janssen
J D
JD
Kok
J J
JJ
Hendriks
M A
MA
D000465:Algorithms; D001672:Biocompatible Materials / Q000737:chemistry*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004548:Elasticity; D008954:Models, Biological; D008956:Models, Chemical; D012399:Rotation; D013314:Stress, Mechanical; D013499:Surface Properties; D013784:Textiles; D014783:Viscosity
D001672:Biocompatible Materials