Abstrakt
The article deals with search for the material parameters that would be suitable for specification of human hair viscoelactic properties. These parameters have simultaneously satisfied an unambiguous differentiation between gravid and non-gravid women.
Microscope was used to determine the hair thickness, a pull-test deformation device then to establish both the tearing resistance and relaxation curves, taken as a basis to determine values of Young's modulus, relaxation time, shear yield point, breaking point, maximum elongation. Taken from the region around occipital condyla, ninety samples of uncolored female hair were placed under measurement.
This study has shown that at least the parameters of yield point, diameter, and the second relaxation time are significantly affected by gravidity.