ANSYS Workbench solution problem

[Elementalnature]

Hi, I am carrying out a transient structural analysis of an expanding fastener in ANSYS Workbench 15. The model was created in Catia and imported into Workbench using DesignModeller. I believe I have defined my problem properly in Mechanical but it just hangs when I solve the solution. What i mean is that it repeats between "Preparing the mathematical model and Solving the mathematical model" but then the overall progress does not progress at all and its been several hours. What does preparing the mathematical model mean and why is it doing it several times? Is it doing it for all the individual parts that make up the whole model.

I have left it since morning and it just won't complete the solve. If it helps, my model is made up of seven parts. I have applied about 9 contact regions on interfacing surfaces between parts (some are frictional, others are frictionless and bonded).

I have used a coarse mesh with a relevance of 0 for the initial mesh and added 7 sizings for each part and set these sizings to an extremely fine mesh with a relevance of 100 and also set fine as the option where ever it is available.

I am using a load step of 10 with increments of 1000 Nmm every 0.1 s all the way to 1. This is applied as a ramped moment

Can someone please tell me what i am doing wrong here? Any ideas are most welcomed

 

[Elementalnature]

I think I've solved this problem, i deleted the sizings and the solve completed