A method for measuring fiber orientation, a fiber orientation measuring device, and a control program for a fiber orientation measuring device

摘要

Provided are a method for measuring the degree of fiber orientation, a device for measuring the degree of fiber orientation, and a control program for measuring the degree of fiber orientation, in consideration of the fiber orientation in the thickness direction, simply and accurately. The method for measuring fiber orientation of the present invention includes a diffraction image acquisition step (step S1) of irradiating a sample with X-rays to obtain an X-ray diffraction image, and an angle (2θ) _{A of the peak derived from the crystal plane of graphite in the X-ray diffraction image.} A peak angle calculation step (step S2) for calculating , a correction factor calculation step (step S3) for calculating a correction factor δ of the thickness of the sample, and an upper limit (2θ) _{B of the peak of the graphite crystal plane} calculation step (step S4), and the diffraction sensitivity calculation step (S6) for calculating a diffraction sensitivity I _C (φ) of the peak derived from the crystal plane of the graphite fiber orientation from the diffraction sensitivity I _C (φ) Sd ( It is characterized by including the orientation degree calculation process (step S7) of calculating (beta)).