GAS tutorial

Can anyone help me out to get some GAS tutorials apart from mentioned already on discussion Forum. I have to check for forces through a four bar mechanism. I want to how do I simulte pivot joints in linkages.

     I would appreciate fast response.

Assuming you have "holes" and the linkage joint locations, I suggest you connect them in the assembly workbenck with "coincident" connections. Then when in the Analysis workbech it would be easiest to assign a userdefined connection property to that assembly restraint.. On that connection property, lock and free up the required DOF (i.e. lock Z-trans, X-rot, Y-rot)