Abstract
The mechanical behaviour of carbon-black (CB)-filled rubber is temperature-dependent. It is assumed that temperature affects the fatigue life of rubber products by changing the tear energy of the material. The static tearing behaviour and fatigue crack propagation behavior of CB-filled rubber at different temperatures were investigated in this study. The critical tear energy of the material was measured through static tear fracture tests at different temperatures; it is shown that the critical tear energy decreases exponentially with increasing temperature. A fatigue crack growth test of a constrained precracked planar tension specimen was conducted at room temperature; the measurements verify that the fatigue crack growth follows a Paris–Erdogan power law. Considering the temperature dependence of the critical tear energy, the temperature dependent fatigue crack growth kinetics of CB-filled rubber was established, and the fatigue life of the material at high temperatures was predicted based on the kinetics. The predictions are in good agreement with experimental measurements.
Highlights
The excellent mechanical properties of rubber enable its widespread use in many applications [1,2,3].Many rubber components, such as tires, vibration isolators, and impact bumpers, experience cyclic loading, which could lead to fatigue failure
Lake and Lindley showed that the fatigue life of styrene butadiene rubber (SBR) gum decreases by a factor of 10,000 when the temperature increases from 0 to 100 ◦ C, and the fatigue life of natural rubber (NR) gum decreases by a factor of 4 for the same temperature range [11]
Fatigue life prediction at different temperatures is very important for rubber components to ensure their reliability and safety, more research is needed on the fatigue life prediction considering temperature factors
Summary
The excellent mechanical properties of rubber enable its widespread use in many applications [1,2,3] Many rubber components, such as tires, vibration isolators, and impact bumpers, experience cyclic loading, which could lead to fatigue failure. Fatigue life prediction at different temperatures is very important for rubber components to ensure their reliability and safety, more research is needed on the fatigue life prediction considering. Fatigue life prediction at different temperatures is very important for rubber components to ensure their reliability and safety, more research is needed on the fatigue life prediction considering temperature factors. To better understand and predict the fatigue life of rubber components, thebetter temperature dependence of the critical life tearofenergy experimentally temperature factors. Developed based on the fatigue crack growth law at room temperature
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