疲労したナイロンタイヤコードの顕微鏡による観察
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概要
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It is useful to observe microscopic defects on fatigued nylon tire cord filament for investigation of fatigue mechanism of nylon fibre.<BR>Nylon tire cords taken from two kinds of fatigued method are used, the one is the specimens which are fatigued by laboratory test (Goodrich type disc fatigue tester) and the other is those from run tires.<BR>A number of oblique streaks were observed near the end of broken filaments which were fatigued by laboratory test. The similar streaks were observed on the fatigued filaments from run tires and predominated in the inner ply cords which mainly compressionaly strained. But, the latter were different in angle, density and grade of streaks from the former, because, the effect of strain would be different in run tire and laboratory tester.<BR>Zaukelies observed a kink band produced by slip of crystallite when compression is given to nylon 6 and 66 filaments.<BR>The oblique streaks which are observed on fatigued nylon filaments may be regarded with deformation of crystalline structure.
- 一般社団法人 日本ゴム協会の論文