Fatigue of carbon cord-rubber composites: Effect of frequency, R ratio and lifetime prediction using constant life models
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Publisher
DOI
10.1016/j.ijfatigue.2020.105558
Journal
International Journal of Fatigue
ISSN
0142-1123
Metadata
Show full item recordAbstract
The influence of frequency and R ratio on tensile fatigue of carbon cord reinforced HNBR composites has been studied. Frequency was found to have negligible effect on fatigue life, due to minimal heat build-up even at the highest frequency. Longer fatigue life at higher R ratios at a given maximum cyclic stress level was associated with the dynamic process of forming and melting of crystallites during loading and unloading, leading to a crack-arresting effect. The applicability of various analytical CLD models showed that the modified Harris’s CLD and piecewise linear CLD gave a reasonably good agreement with experimental fatigue data.