Bidirectional tensile testing cell for in situ small angle X-ray scattering investigations of soft tissue

• An X-ray cell for the acquisition of one-dimensional mechanical force-displacement diagrams of soft tissue samples has been developed. The combination of X-ray and mechanical data allows new insights into the coupling of the macroscopic behavior and nanoscopic structural changes during the application of load. Two linear mu-translation stages are used to symmetrically - i.e. bidirectionally - stretch the sample. A video-extensometer is installed to record geometrical changes of the sample during measurement which allows to determine true stresses and strains. The sample can be immersed in a liquid and heated. We demonstrate the advantages over common unidirectional tensile testing devices without length measurement systems by comparing different mechanical and diffraction data sets of human arterial tissue.

Ämnesord

NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)

Nyckelord

tensile testing

X-ray cell

soft tissue

biomechanics

small angle X-ray diffraction

small angle X-ray scattering

SAXD

SAXS

artery

collagen

fibre diffraction

mechanical-properties

collagen orientation

connective tissues

fibers

model

wall

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)