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METHOD FOR MEASURING CRITICAL STRESS INTENSITY FACTOR OF FIBER
METHOD FOR MEASURING CRITICAL STRESS INTENSITY FACTOR OF FIBER
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机译：纤维临界应力强度因子的测量方法
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摘要
PROBLEM TO BE SOLVED: To provide a method for measuring a critical stress intensity factor of a fiber, which makes the number of samples small by forming a size-controllable defect in the fiber, and can obtain the critical stress intensity factor of the fiber with high precision by enabling the size of the defect to be defined clearly.;SOLUTION: The method for measuring the critical stress intensity factor of the fiber is characterized in that a surface of the fiber is irradiated with a laser beam, thereby forming a hemispheric defect whose size is 1%-50% of the diameter of the fiber, and the fiber is broken at the portion having the hemispheric defect by carrying out a tension test, and the critical stress intensity factor is obtained from the size of the hemispheric defect and the breaking strength of the fiber, by using following equation: KIC=σ√(πc), wherein KICis the critical stress intensity factor, and σ is the breaking strength, and c is the size of the hemispheric defect, and π is circular constant.;COPYRIGHT: (C)2009,JPO&INPIT
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机译：解决的问题：提供一种测量纤维的临界应力强度因子的方法，该方法通过在纤维中形成尺寸可控的缺陷来减少样品数量，并且可以通过以下方法获得纤维的临界应力强度因子：解决方案：用于测量纤维的临界应力强度因子的方法的特征在于，用激光束照射纤维表面，从而形成半球形缺陷其尺寸为纤维直径的1％-50％，并且通过进行拉伸试验使纤维在具有半球形缺陷的部分处断裂，并且从半球形缺陷的尺寸获得临界应力强度因子。纤维的断裂强度，可使用以下公式：K IC =σ＆radic;（＆pi; c），其中K IC 是临界应力强度因子，和＆sigma;是断裂强度，c是半球缺陷的尺寸，＆pi;是循环常数。; COPYRIGHT：（C）2009，JPO＆INPIT
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