Open AccessIn situ tensile testing of human aortas by time‐resolved small‐angle X‐ray scattering
Author(s) -
Schmid F.,
Sommer G.,
Rappolt M.,
SchulzeBauer C. A. J.,
Regitnig P.,
Holzapfel G. A.,
Laggner P.,
Amenitsch H.
Publication year - 2005
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049505012549
Subject(s) - materials science , ultimate tensile strength , scattering , nanoscopic scale , diffraction , composite material , synchrotron radiation , in situ , small angle x ray scattering , tensile testing , synchrotron , stress (linguistics) , collagen fibres , wide angle x ray scattering , layer (electronics) , fiber diffraction , optics , x ray crystallography , neutron scattering , chemistry , nanotechnology , small angle neutron scattering , anatomy , physics , organic chemistry , medicine , linguistics , philosophy
The collagen diffraction patterns of human aortas under uniaxial tensile test conditions have been investigated by synchrotron small‐angle X‐ray scattering. Using a recently designed tensile testing device the orientation and d ‐spacing of the collagen fibers in the adventitial layer have been measured in situ with the macroscopic force and sample stretching under physiological conditions. The results show a direct relation between the orientation and extension of the collagen fibers on the nanoscopic level and the macroscopic stress and strain. This is attributed first to a straightening, second to a reorientation of the collagen fibers, and third to an uptake of the increasing loads by the collagen fibers.