Hi Ayham,
Breaking a Simscape network completely with Simulink elements is very challenging. You will end up inserting delays which can lead to your system going numerically unstable. Normally, if you must to do that, you insert the Simulink elements where there is some compliance in your system (spring-damper, compressibility, capacitance, ...) and you can incorporate the physical effect into the delay.
In this case, I would recommend you try to use Simulink to calculate your clutch characteristics but use a Variable Rotational Damper or even the Fundamental Friction Clutch block. If you can implement your Simulink logic in Simscape language, you can avoid all delays as well.
--Steve
