518 複合材料繊維における弾性係数の直接評価(高分子/高分子基複合材料(1),ものづくりにおける基礎研究と先端技術の融合)

概要

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In predicting the mechanical properties in fiber reinforced composite materials, it is very important to evaluate the mechanical properties in reinforcing fibers. However, it is not very easy because of the small diameter of fibers. It is known that carbon fibers have anisotropy and the mechanical property is assumed to be orthotropic or transversely isotropic. However, few examples of direct measurements of the anisotropic elastic constants of carbon fiber are seen. In the present study, we made an attempt to evaluate the elastic constants in a carbon fiber as a transversely isotropic material. If we assume that a carbon fiber is a transversely isotropic material, there are five independent elastic constants, that is, axial Young's modulus, the axial Poisson's ratio, the transverse Young's modulus, the transverse Poisson's ratio and the axial shear modulus. In the first place we tried to evaluate the axial shear modulus by torsion test.
一般社団法人日本機械学会の論文
2010-11-27