Abstract :
In order to find out the relationship between driving torque and thickness of abrasive layer of a three-body abrasive wear system, a continuum model of abrasive layer was proposed. The model is based on the assumption of continuum of abrasive particles and a continuous contact pressure distribution was obtained. A sand crushing test was designed to get compressive behavior of the abrasive layer. The test was used to understand the loading–unloading–reloading behavior and the constitutive relationship between compressive displacement and compressive loading. The macro-contact pressure distribution of the abrasive wear between the cylinder–cylinder and cylinder–plane was obtained based on the sand compressive behavior. With the sand compressive behavior, an FEA model has been built for ring-on-ring abrasive wear test machine to simulate the normal contact pressure distribution and friction force. To verify the model, a set of experiments was conducted. Quartz sands were used as abrasives in the analysis and test. The measurement of torque accorded well with model prediction. With this model, only a simple sand crushing test is needed to obtain the relationship between driving torque and thickness of abrasive layer which is important for wear prediction of a three-body abrasive wear system.
