| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
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| Outline of Final Research Achievements |
In this study, effects of kink band on tensile and fatigue strength of Poly-p- Phenylene Benzobisoxazole (PBO) fibers were investigated. As a result of Weibull analysis, it was found that kink bands act as defects that degrade the tensile strength. A Weibull analysis demonstrated that the concept of effective volume explains the tensile strength of PBO fiber. When the PBO fiber with kink band was subjected to ultraviolet light, the residual strength is greatly reduced due to the auto-oxidation generated in the kink damaged region. The maximum stress was most suitable parameter to describe the fatigue strength of PBO fiber with kink band.
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