Transition from mild to severe wear including running in effects

In the current study a physical based threshold is used to calculate the transition from mild to severe wear. This threshold is formed by using a local coefficient of friction, which is split into two regimes: one high friction regime with a coefficient of friction of in the range of 0.1–0.15 and a high frictional regime in the range of 0.3–0.4. The transition from one to another is determined by the local transition of the predetermined critical contact temperature. To validate the model an experimental transition diagram is determined. The experimental results agree with the simulation for both the location of the transition as for the severity of the adhesive wear.

Research highlights▶ The transition from mild to severe adhesive wear can be modeled using a thermal threshold. ▶ The severity of the adhesive can be estimated using a local coefficient of friction in combination with a simplified yield model. ▶ Using a physical based stability threshold (e.g. does the severe wear stay local or is the complete contact going to fail) the transition from mild to severe wear can be modeled.