Fatigue of vulcanized natural rubber under proportional and non-proportional loading

摘要

Two natural rubber (NR) compounds of hardness shore A 60 and 70 with 10 different biaxial displacement/twist paths were investigated using an axi-symmetric cylindrical hollow dumbbell specimen. The effects of the proportional and non-proportional loading modes on the fatigue life are discussed. In total, 52 fatigue test results are reported with fatigue life results of 3,918 to 488,000 cycles. The effect of the channel phase on the fatigue life is discussed.