Unable solve solution ” solver checks failed”

- November 21, 2019 at 10:35 am
  
  Hayati
  Subscriber
  
  I have a problem when solving the solution. the message appear after I solve the solution. I already change my end time to smaller values and change the no of points to 200. I also don't know where the log file.
- November 23, 2019 at 4:34 pm
  peteroznewman
  Subscriber
  RMB on the Solution branch and Open Solver Files Directory. In the Windows Explorer that opens, find Solve.out and open that with Notepad. In there you will see the following.
```
License acquired!

Checking model setup.....Please wait

ERROR! Number of elements exceeded for Academic Teaching version - elements limited to    32000.
```
  The number of nodes or elements must be < 32000 for the solver to run. Your mesh has 46,400 elements.
  
  There are several things wrong with this model.
  
  1) You should convert this thin-walled solid to a midsurface model using SpaceClaim. Then you will have shell elements with an assigned thickness covering surfaces that represent the car and the pole instead of solid bodies. Once you mesh with shell elements, you will easily stay below the Student license limit.
  
  2) You should move the car (or pole) until they are tangent (touching). The reason is that explicit dynamics must use very small time steps dictated by the smallest element in the model. You have about a 0.14 m gap between the car and the pole. At the velocity used of 11 m/s, it will take about 0.0125 seconds until impact. That is a lot of cycles to be waiting for the interesting part.
  
  3) You have correctly assigned an initial velocity to the car. Don't also assign a velocity boundary condition to the whole car. That turns the car into a rigid body. Similarly, don't apply displacement boundary conditions to the car. Once it is a surface model, you can pick a circular edge of a wheel well and create a remote displacement to set Y=0. Repeat four times so each wheel is independent.
- November 30, 2019 at 11:39 am
  
  Hayati
  Subscriber
  
  Okey. Noted. Thank you very much.
- November 30, 2019 at 11:42 am
  
  peteroznewman
  Subscriber
  
  Please mark this DIscussion as Solved by clicking the Is Solution link.