Hi @jousefm
OK Ben, thanks, I think I have got that: for bonded connections we use a linear simulation and that uses a static load.
Going back to the first simulation design, as I understand it: using physical contacts means I need a nonlinear method, which likes to increment the load. After five runs I am still getting ‘matrix is not factorizable’ and don’t know what to try next.
BTW, this is a real application. I am designing the brakes for this: http://www.catchmewhocan.org.uk