SMCにおけるサイジング剤に関する研究 : 第2報,強度に及ぼす影響
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概要
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In previous report it was revealed that sizing didn't spread in resin and much sizing was around strands. In this study effect of sizing around strands on tensile strength and fatigue strength of SMC was investigated. Six types of SMC differing in amount and properties of sizing were prepared. The results of tensile test for the specimens showed that specimens with much sizing had best tensile properties. The reason was suggested that sizing around strands prevented cracks on interphases between fibers and resin from growing and increased tensile strenght. The results of fatigue test showed that the more amount of sizing had the higher fatigue strength and properties of sizing made effect on fatigue strength. According to degradation of stiffness ratio during fatigue test, the reason was suggested that sizing around strands made effect on fatigue mechanisms. In addition, it was likely that distribution of fibers relied on properties of sizing and had effects on transverse crack propagation. In result, the lower stress on fatigue test was, the larger effect of distribution of fibers was.
- 2005-03-25
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