Ansys Employee
,nSince I am not an expert in biomechanics I can't really tell you if the above used contact conditions provide realistic representations of the interface. Although, I could explain the meaning of each contact. In bonded type of contact all the nodes of mating surfaces are restricted in moving with respect to each other (like they are glued together),in a no separation contact the surfaces are restricted to move along the normal direction but can slide in tangential direction, in a frictionless contact the surfaces can get separated and also slide against each other, a frictional contact the surfaces can slide only after the applied for overcomes the static friction. You could check these 2 courses for a better understanding https://courses.ansys.com/index.php/courses/contact-mechanics/ and https://courses.ansys.com/index.php/courses/fundamental-topics-in-contact/ of how to set up contacts.nBonded and no separation are linear contacts and thus computationally inexpensive while the rest are non linear, computationally expensive and may cause convergence difficulties. Also, there are several ways to model bolted joints (check this course https://courses.ansys.com/index.php/courses/bolted-connections-2/) depending on the objective of analysis. What is the objective of your analysis? If you are interested in the plate you could use a bonded contact for bolt. Also when you say tension increases 20 times, is it the tension in the bolt? Does the solution converge for frictional contact if not the increase might be because of non convergence. nThe program controlled setting work fine in most cases though you need to make changes to deal with non-convergence. nRegards,nIshan.n