Static structural simulation stuck at 0% despite small 1st-order mesh

Project Support
1

Hi, I’m performing a linear static structural analysis of a Formula Student brake disc in SimScale.

My previous runs failed with machine out-of-memory errors, so I reduced the mesh and changed from 2nd-order to 1st-order elements.

Current mesh:

  • 1st-order tetrahedral elements
  • 116,906 tetrahedra
  • 28,843 nodes
  • SimScale reports that the mesh meets quality criteria

Current simulation:

  • Linear static structural
  • AISI 420 stainless steel
  • Young’s modulus: 200 GPa
  • Poisson’s ratio: 0.27
  • Density: 7750 kg/m³
  • Fixed support on six mounting-hole cylindrical faces
  • Remote moment: Mz = 328.8 N·m
  • Centrifugal loading corresponding to 158.4 rad/s

Run 5 has been running for approximately 28 minutes but remains at 0%.

The Event Log only shows:
“Job was prepared successfully.”

However, the Solver Log shows:

Is this expected solver behavior at this stage, or could the simulation be stuck during matrix assembly/solution? Is there anything I should change regarding solver settings or compute resources?

3

Hi,

I don’t think I have access to your project, but from the screenshots that were posted it’s very likely that the remote force boundary condition is associated to entities with too many nodes. Remote force, remote displacement, and point mass are quite demanding from a memory perspective (the more nodes they are associated with, the more memory they require).

Some options:

  • Making the mesh coarser
  • Associating the remote force boundary condition against edges instead of faces, if possible
  • Or manually assigning a bigger machine (e.g. 32 cores) with a small number of parallel processes (e.g. 2) in the simulation control settings