Elastic Sliding between two contact surfaces

Altair Forum User

Hi together,

 

i would like to connect two surfaces of two different parts. The contact should be able to slide transverse (with a specific Stiffness). 

 

Is there an option to define this transverse stiffness in the PCONT options. Can i define it over Mu1? I am just wondering because Kt is calculated with the Equation Kt = Mu1*Stiff and Stiff is only a relative? Or is there any other way to prescribe a specific stiffness to the contact (and transverse)?

 

Do i have to enable the option FRICESL to enable the sliding?

 

Thank you for your help!

 

Sebastian 

Altair Forum User

Hi Sebastian,

 

You ca provide stiffness  using STIFF_REAL_VAL on PCONT.

 

Ofcourse Mu1 affects the transverse stiffness KT.  You can include FRISCEL>> AUTO this may help enable sliding. 

 

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Altair Forum User

Thanks a lot for your response!

 

Do you know what is the difference if i use the contact with FRISCEL and without?

 

Best Regards,

 

Sebastian

Altair Forum User

Hi Sebastian,

 

If you specify a distance value,  the frictional force will be proportional the distance and linear. 

 

If it is a non zero value sliding will be based on transverse stiffness KT

Altair Forum User

Thanks again!

 

So if i specify a sliding distance in FRISCEL  of 5 mm the frictional force will grow linear. But at what slope? The transverse stiffness?

 

What happens if the sliding exceeds those 5 mm? Or is the friction force at 5mm slide increased, so that the sliding distance can t exceed this value?

Altair Forum User

Hi,

 

I need to check about the slope of the linearity.  I will get back to you ASAP!!!