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Dear people I want to study an interference coupling by the use of COSMOS: I have a shaft and a bush. They are coupled with interference (the outer shaft diameter is bigger then the inner bush diameter). An axial load is applied to the bush. Is it possible that the bush move around the shaft? Is...

Dear people I have a magnetic coupling (joint) that move a component. It gives a resistance to the motion proportional to the square of the speed. If the speed exceeds a specific limit, there is a slip in the joint. This means that the component go on to rotate but not synchronously to the main...

Hi! Could someone suggest to me where I can find some information of a roller bearing test benches Thank you Best regards Manini

Hi! Could someone suggest me how to select the correct grease for a specific bearing that works in specific conditions? Could someone suggest me some references, web site or other that could help me? Thank you By Manini

Hi! Could someone suggest me how to correlate a bearing vibration signal with its degree of wear? Thanks By Manini

Thank you Brad Your answer is very clear but… I had some problems when I scratched my fingernails across a chalkboard!!! Thank you also to Dr Michael, izax1, objengrs By friends! Manini

Thank you friends Sure, there is a resonance, but why? My force is not a periodic force It could be “sleep stick excitation", like Michael told me. I’ve hear also “self-exitation friction” name. This means that friction increase when you apply a particular force, but I don’t know other...

Dear people Could someone tell me the name of the phenomena for witch when you move your finger with a specific speed under a surface (for example the border of a glass) you can hear a noise? Thank you guys By Manini

Thank you friends The problem is more clear By Manini

Thank you Bbird for your answer Yes, it’s true. For low force value (low pressure) friction coefficient is independent to pressure, but when the pressure is high, friction coefficient depend also to pressure. (I don’t know this correlation). About material. I expect that correlation contain some...

Hi! Could someone suggest me some formula to evaluate friction coefficient - between two rough surface - without lubrication - with high pressure Thank you Manini

Dear people I’m trying to simulate a coupling with interference (shaft has a diameter bigger than the flange) using COSMOS. I don’t know very well this software. Could someone give me some suggestions? Thanks Manini

Thank you Jmoritz Very kind Manini

Could someone help me to understand how to calculate oil flow rate on the main bearing of the crank-shaft of a car? Thank you Best regards Manini

I’m trying to find a software for automatic water pump optimisation. I mean software have to change automatically the geometry to obtain the best performance. This software has to use CFD techniques. Do you know some software that can do this? Thank you Manini