材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
切欠きを有するFRP積層板の低サイクルおよび高サイクル疲労強度の研究
前川 善一郎五辻 精一藤井 太一
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1986 年 35 巻 393 号 p. 636-641

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This paper deals with the fatigue behavior of FRP laminates with a U-type notch. The material used in this experiment was plain-woven glassfiber cloth reinforced unsaturated polyester resin. The fatigue tests of the notched specimens were carried out in such a wide range that the number of cycles to failure varied from 5 to 8000000. The fatigue tests of the unnotched specimens were also conducted. The fatigue damages at various cycle ratios were observed, and the fatigue lives for various stress levels were measured. A simple residual strength degradation model was proposed in order to predict the fatigue life under pulsating tensile loadings. The prediction of fatigue life computed by the proposed fatigue damage cumulative model agreed well with the experimental data.

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