Open AccessMechanical properties of cellulose fibres and wood. Orientational aspects in situ investigated with synchrotron radiation
Author(s) -
Kölln Klaas,
Grotkopp Ingo,
Burghammer Manfred,
Roth Stephan V.,
Funari Sergio S.,
Dommach Martin,
Müller Martin
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/s0909049505011714
Subject(s) - softwood , materials science , cellulose , ultimate tensile strength , in situ , composite material , diffraction , synchrotron radiation , strain (injury) , synchrotron , strain hardening exponent , microfibril , orientation (vector space) , x ray , optics , chemistry , geometry , organic chemistry , medicine , physics , mathematics
Highly oriented native cellulose fibres (flax) and softwood (pine) have been investigated by means of X‐ray diffraction. Local structural information was obtained by using X‐ray microbeams. Tensile tests were performed in situ , revealing a change of orientation of cellulose microfibrils in materials with tensile strain. In flax fibres, the microfibrils rotate during the first percent of stretching, into a more parallel orientation with respect to the fibre axis. For wood, a decrease of orientation with the onset of strain hardening is found for the first time.