We need 4 elements: 1. body, 2. counterbody, 3. interfacial medium, and 4. environment medium. For example, humidity affects significantly the Friction behavior of ceramics and polymers. Regards.

Sir,

Tribosystem depend on two factor

1-system dependent(mechanical Environmental factor)

2- material dependent

But my question about the only tribo system.

Environment is coming into picture after test.

Hello, you can check my info in DIN50320 standard, although it has not received more updates. Regards.

@Bhaskar

'Tribology' is affected by 'Environment' hence in 'System'

@Bhaskar

eg., 'Flow of water in pipe'

may have answer of your question

Giuseppe Pintaude ,

Yes tribology affected by environment but I am interested in tribo system that is in static condition.

DIN50320 standard, considered environment also for wear analysis.

Sir, you are correct if wear take place,

but as a static system, no role of environment.

My dear, in my opinion I cannot associate any tribossystem with a static system. Wear means movement. Anyway, trying to ask your point "an example where 2nd and 3rd system is same", you can use several two-body abrasion systems: the counterbody and the interface, at the beggining, is the same. Being more specific, a grinding paper, for example. Cheers.