10107 寸法効果に着目したSiC繊維強度向上の考察(微小部材の強度,OS10 先進材料の力学と強度)

概要

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The size effect on the diameter has been assessed for the tensile strength of Tyranno ZMI Si-Zr-C-O fiber (UBE INDUSTRIES, LTD.), which shows variable diameter along the gauge. Single fibers of measured diameters have been tensile tested to provide two groups of data, i.e., "small diameter" group and "large diameter" group. The parameters of single-modal Weibull model showed inconsistency on the two groups, thus the Weibull parameters have shown the dependence on the sample diameter. Scanning electron microscope (SEM) analyses had revealed characteristic fracture patterns of extremely weak samples only in "large diameter" group. The potential in the strength improvement has been discussed for an imaginary fiber, which does not contain the characteristic crack sources.
一般社団法人日本機械学会の論文
2005-03-17