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METHOD FOR MEASURING FIBER ORIENTATION DEGREE, FIBER ORIENTATION DEGREE MEASUREMENT APPARATUS, AND CONTROL COMPUTER PROGRAM FOR FIBER ORIENTATION DEGREE MEASUREMENT APPARATUS
METHOD FOR MEASURING FIBER ORIENTATION DEGREE, FIBER ORIENTATION DEGREE MEASUREMENT APPARATUS, AND CONTROL COMPUTER PROGRAM FOR FIBER ORIENTATION DEGREE MEASUREMENT APPARATUS
A method for measuring a fiber orientation degree includes: irradiating a sample formed of a composite material containing discontinuous carbon fibers with an X-ray to acquire an X-ray diffraction image; calculating an angle (2θ)A of a peak originating from a crystal face of graphite; calculating a correction coefficient δ of a thickness of the sample; calculating an upper limit (2θ)B of the peak of the crystal face of graphite; calculating a diffraction sensitivity IC(ϕ) of the peak originating from the crystal face of graphite by correcting an integrating range with the correction coefficient δ and integrating the X-ray diffraction image with respect to a diffraction angle (2θ); and calculating a fiber orientation degree Sd(β) by the method of Hermans from the diffraction sensitivity IC(ϕ).
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机译:测量纤维取向度的方法包括:用X射线辐照由包含不连续碳纤维的复合材料形成的样品,以获取X射线衍射图像;以及将X射线照射到样品中。计算源自石墨晶面的峰的角度(2θ) A Sub>;计算样品厚度的校正系数δ;计算石墨的晶面的峰的上限(2θ) B Sub>;通过用校正系数δ校正积分范围并相对于衍射角积分X射线衍射图像,计算出源自石墨的晶面的峰的衍射灵敏度I C Sub>(ϕ) (2θ);根据衍射灵敏度I C Sub>(ϕ),采用Hermans方法计算纤维取向度Sd(β)。
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