I'm currently writing my thesis on a "Finite Element Analysis of rail fastening systems under dynamic load", and I'm using ANSYS Workbench 14.0 for that matter. I don't know how to define the contact area for the clip and the angle guide plate, since it will be changing over time as the clip (and the plate) deform due to the loads applied. http://imgur.com/xbLPbOl http://imgur.com/eVhZB6G This picture shows the existing gap between them, for you to see the future contact areas: http://imgur.com/YdmPnxy The CAD data for both objects were obtained with a 3D scanner, which means that the surfaces are neither smooth nor perfectly fitting to each other. I'm too experienced with ANSYS; therefore a thorough answer will be greatly appreciated! Thank you in advance!