Hi @Anonymous,
It takes the time to solve with your model, so I created a simple model so that it will be easier to find out what was the issue.
You just use the contact option with all "separation". In that case, During running, the model was separated.

So I changed the contact option to the Bonded, and this is the results.

However, we should consider about an analysis type. Do you want to try a kind of an impact analysis? And see the broken view??
This is a description about the analysis type it will help to understand.
Event Simulation: 1, 2 This simulation type expands capabilities beyond nonlinear static stress analysis by adding support for the following characteristics:
- Velocity and damping as well as mass and acceleration (inertial effects) are considered for true time-dependent, dynamic event simulation (such as impact analyses).
- Load curves control the magnitude of applied loads and prescribed displacements as a function of time.
- Load increments are not arbitrary divisions of a static load or displacement. Instead, they define structural conditions at actual instantaneous time points during the simulated event. Results are calculated and output at each incremental point in time.
Nonlinear Static Stress: 1, 2 This simulation type expands capabilities beyond static stress analysis by adding support for the following characteristics:
- Large deformation and motion
- Changes in contact during the simulated event
- Changes in loads or boundary conditions during the simulated event
- Nonlinear material behavior (such as changes in material stiffness and permanent deformation, both of which occur when the material is stressed beyond the yield strength)
- Multiple calculation increments are performed as the loads are gradually applied (ramped up)
One more thing, there are many components with the same materials. If you don't consider about bolts, it will be easier to combine with the same materials.
Could you take a look at your contact information?
Many thanks,
Ahreum.