信頼性工学手法によるガラス短繊維強化セメントの強度の研究 : 線維含有量及び温度依存性(<小特集>信頼性工学小特集)

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Glass fiber reinforced cement (GRC) made by incorporating discontinuous random glass fibers into cementitious matrix is nowadays regarded as a useful material for civil engineering applications in order to increase the tensile strength and fracture energy, and to provide some degree of ductility in the behavior of the material. Since commercial composite materials possess generally a considerable scatter in their mechanical properties, understanding of the source and nature of the variability in GRC is considered to be very important for better utilization of this material. In this study, the mechanical behavior of GRC with various fiber contents was investigated in tensile tests from -30℃ to 200℃. The main results obtained are summarized as follows; (1) The tensile strength distribution of GRC can be represented by a normal or Weibull distribution as same as those of other composite materials. (2) The stress-strain relation of GRC consists of two stages. The slope of the relation remains linear in the first stage. The subsequent change in the slope is caused by the pull-out of fiber and the microscopic failure of matrix. The fiber content and test temperature are found to have significant effects upon these mechanical behaviors, (3) The average and the coefficient of variation of the tensile strength of GRC were calculated by use of the law of mixture of strength and were found to agree with the experimental data. Furthermore, the influence of the constituent material on the strength of GRC was discussed.
社団法人日本材料学会の論文
1980-01-15

信頼性工学手法によるガラス短繊維強化セメントの強度の研究 : 線維含有量及び温度依存性(<小特集>信頼性工学小特集)

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