Structural heterogeneity and stress distribution in carbon fiber monofilament as revealed by synchrotron micro-beam X-ray scattering and micro-Raman spectral measurements
Source abstract
Abstract
Abstract The Raman band shift has been measured under tension for carbon fiber (CF) monofilaments of different structural heterogeneity as characterized by a synchrotron micro-beam X-ray diffraction measurement. The apparent Raman band shift factor or the band shift caused by an application of bulk tensile stress 1 GPa was found to be larger for the CF fiber with the higher modulus or the sample with the harder skin part. In order to interpret the observed Raman shift data concretely, a complex mechanical model consisting of parallel array of skin and core parts has been proposed as a temporary model, which allows us to understand the structure–mechanical property relationship of the carbon fiber monofilament in a semi-quantitative manner.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fiber-reinforced polymer composites · Mechanical Behavior of Composites · Carbon Nanotubes in Composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (18)
Show source-provided references
1. Characterization of commercially-available PAN (polyacrylonitrile)-based carbon fibers10.1351/pac198658030455 ↗
2. Texture of PAN- and pitch-based carbon fibers10.1016/S0008-6223(01)00139-7 ↗
3. Direct observation of nanocrystallite buckling in carbon fibers under bending load10.1103/PhysRevLett.95.225501 ↗
4. Skin–core structure and bimodal Weibull distribution of the strength of carbon fibers10.1016/j.carbon.2007.09.011 ↗
5. Effect of uniaxial stress on the Raman spectra of graphite fibers10.1063/1.340975 ↗
6. Effect of fiber microstructure upon the modulus of PAN- and PITCH-based carbon fibers10.1016/0008-6223(94)00109-D ↗
7. Strain dependence of the Raman frequencies for different types of carbon fibers10.1007/BF01729187 ↗
8. Strain dependences of the first- and second-order Raman spectra of carbon fibers10.1007/BF01730722 ↗
9. Morphological effect on the Raman frequency shift induced by tensile stress applied to crystalline polyoxymethylene and polyethylene: spectroscopic support for the idea of an inhomogeneous stress distribution in polymer material10.1016/0032-3861(88)90389-8 ↗
10. Quantitative evaluation of stress distribution in bulk polymer samples through the comparison of mechanical behaviors between giant single-crystal and semicrystalline samples of poly(trans-1, 4-diethyl muconate)10.1002/polb.10396 ↗
11. Stress distribution in poly-p-phenylenebenzobisoxazole (PBO) fiber estimated from vibrational spectroscopic measurement under tension I. stress-induced frequency shifts of Raman bands and molecular deformation mechanism10.1002/polb.10186 ↗
12. Stress distribution in poly-p-phenylenebenzobisoxazole (PBO) fiber estimated from vibrational spectroscopic measurement under tension II. analysis of inhomogeneous stress distribution in PBO fiber10.1002/polb.10185 ↗
13. Diffraction-limited microbeam with fresnel zone plate optics in hard X-ray regions10.1143/JJAP.40.1508 ↗
14. The influence of graphitization on the mechanical properties of carbon fibers10.1007/BF01584920 ↗
15. Rotation and extension of crystallites in carbon fibers by tensile stress10.1016/0008-6223(94)90080-9 ↗
16. Elastic moduli of nanocrystallites in carbon fibers measured by in-situ X-ray microbeam diffraction10.1016/S0008-6223(02)00359-7 ↗
17. Non-hookean stress–strain response and changes in crystallite orientation of carbon fibers10.1007/BF00366347 ↗
18. Raman spectroscopy of graphite10.1098/rsta.2004.1454 ↗