Fatigue testing and evaluation for coated steel belts based on electrical method

Аннотация

Based on analyzing the reasons leading to electrical resistance change of an in-service steel wire rope, an experimental system is developed to determine the potential strength degradation of coated steel belts by monitoring the encapsulated ropes' electrical resistance as well as environmental temperature. The temperature is used to compensate the electrical resistance and get an identical evaluation criterion under an assumed temperature. Research results demonstrate that electrical resistance of ropes will increase as the fretting wear and fatigue damage become more serious with reciprocating cycles increasing. A model of resistance variance with the cycles has been established. Experiments proved that measured electrical resistance of ropes inside the belts could effectively fulfil the fatigue evaluation and lifespan prediction for the belts.