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Updated: Aug 14, 2026

Micro/Nano-scale Strain Distribution Measurement from Sampling Moiré Fringes
Published on: May 23, 2017
Direct observation of nanocrystallite buckling in carbon fibers under bending load
D Loidl1, O Paris, M Burghammer
1Institute of Materials Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria.
Abstract:
Single carbon fibers are deformed in bending by forming loops with varying radius. Position-resolved x-ray diffraction patterns from the bent fibers are collected from the tension to the compression region with a synchrotron radiation nanobeam of 100 nm size from a waveguide structure. A strain redistribution with a shift of the neutral axis is observed. A significant increase of the misorientation of the graphene sheets in the compression region shows that intense buckling of the nanosized carbon crystallites is the physical origin of different tensile and compressive properties.
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